篇一 :实验四 分析天平称量练习 实验报告参考

实验教案  实验四   分析天平称量练习

一、   实验目的

1.掌握直接称量法、固定质量称量法和递减称量法。

  2. 练习并熟练掌握分析天平的基本操作和常用称量方法。

 3  .培养准确,整齐,简明记录实验原始数据的习惯。

二、  实验用品

托盘天平;半机械加码电光分析天平;电子天平;表面皿;称量瓶;纸条;烧杯等。

三、实验原理

 (一)分析天平的称量方法

分析天平的称量方法一般有直接称量法,固定质量称量法和递减称量法三种。

1  接称量法(又称直接法)

该法一般用于称量某一不吸水、在空气中性质稳定的固体(如坩锅、金属、矿石等)准确质量。称量时,将被称量物直接放入分析天平中,称出其准确质量。

2  定质量称量法

该法一般用于称取某一固定质量的试样(一般为液体或固体的极细粉末,且不吸水,在空气中性质稳定)。称量时先在分析天平上称出干净且干燥的器皿(一般为烧杯、坩锅、表面皿等)的准确质量,再将分析天平增加固定质量的砝码后,往天平的器皿中加入略少于固定质量的试样,再轻轻震动药匙使试样慢慢撒入器皿中,直至其达应称质量的平衡点为止。

…… …… 余下全文

篇二 :分析天平的使用实验报告

??<html> <head> <meta http-equiv=Content-Type content="text/html; charset=unicode"> <meta name=Generator content="Microsoft Word 15 (filtered)"> <title>R恎Sf[瀃寶</title> <style> <!-- /* Font Definitions */ @font-face {font-family:媅SO; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:"\@媅SO"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:媅SO;} p.MsoHeader, li.MsoHeader, div.MsoHeader {mso-style-link:"u? w Char"; margin:0cm; margin-bottom:.0001pt; text-align:center; layout-grid-mode:char; border:none; padding:0cm; font-size:9.0pt; font-family:"Calibri","sans-serif";} p.MsoAcetate, li.MsoAcetate, div.MsoAcetate {mso-style-link:"yb鑜Fh噀,g Char"; margin:0cm; margin-bottom:.0001pt; font-size:9.0pt; font-family:媅SO;} p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph {margin:0cm; margin-bottom:.0001pt; text-indent:21.0pt; font-size:12.0pt; font-family:媅SO;} p.p0, li.p0, div.p0 {mso-style-name:p0; margin:0cm; margin-bottom:.0001pt; font-size:10.0pt; font-family:"Times New Roman","serif";} span.Char {mso-style-name:"u? w Char"; mso-style-link:u? w; font-family:"Calibri","sans-serif";} span.Char0 {mso-style-name:"yb鑜Fh噀,g Char"; mso-style-link:yb鑜Fh噀,g; font-family:媅SO;} /* Page Definitions */ @page WordSection1 {size:595.3pt 841.9pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.WordSection1 {page:WordSection1;} /* List Definitions */ ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --> </style> </head> <body lang=ZH-CN> <div class=WordSection1> <p class=p0 align=center style='text-align:center;text-autospace:ideograph-other'><span lang=EN-US style='font-size:10.5pt;font-family:媅SO'><br> <br> ?????????????? </span><span style='font-size:10.5pt;font-family:媅SO'>R恎Sf[瀃寶<span lang=EN-US>? </span><b>䦆 z瀃寶JT</b></span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0 align=right style='margin-left:252.0pt;text-align:right;text-indent: 21.0pt;text-autospace:ideograph-other'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0><span style='font-family:媅SO'>瀃寶 T饄?陗簨蔛R恎)Ys^饄蠎脋`N</span><span lang=EN-US><br> </span><span style='font-size:10.5pt;font-family:媅SO'>c黐?^? </span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span style='font-size:10.5pt;font-family:媅SO'>覻<span lang=EN-US>??? </span> T?</span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span style='font-size:10.5pt;font-family:媅SO'>t^<span lang=EN-US>??? </span>?</span><span lang=EN-US style='font-size:10.5pt'> </span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span style='font-size:10.5pt;font-family:媅SO'>f[<span lang=EN-US>??? </span>鱏?</span><span lang=EN-US style='font-size:10.5pt'> </span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span style='font-size:10.5pt;font-family:媅SO'>b<span lang=EN-US>??? </span>閪?</span><span style='font-size:10.5pt'> </span><span lang=EN-US>0</span><span style='font-family:媅SO'>R</span></p> <p class=p0 style='text-align:justify;text-justify:inter-ideograph;text-autospace: ideograph-other'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>N0瀃寶顅剉</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt; font-family:媅SO'>1</span><span style='font-size:10.5pt;font-family:媅SO'>0f[`NR恎)Ys^剉鶺,g蚫\O孴7h罷剉饄蠎筫誰 ?ZP0R焣脋0WO(u)Ys^0</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt; font-family:媅SO'>2</span><span style='font-size:10.5pt;font-family:媅SO'>0鵚{Q芉nx0?{f0W皨U_瀃寶烻薡penc剉`N颼 ? N梍俶9epenc ? N梍\penc皨U_(W瀃寶JT竳錘Y剉0W筫0</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>孨0瀃寶鶺,g烻t</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>(u皊鉔5uP[?b/g蹚L堭y蠎剉)Ys^饄:N5uP[)Ys^0vQ饄蠎烻t/f5u義汻s^a垷St0S_奲?5u黐縹>e(W義:W-N鰁 ?黐縹\u義汻 ?S_義:W:_ N豐鰁 ?汻剉'Y\NAm菑縹W剉5uAm:_bck詋0俌irSO剉蛻汻筫TT N ?5u義汻筫TT N ?孨?鴙s^a? ?R惽忺[縹剉5uAmN珗饄irSO剉(嵪?bck詋0</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>5uP[)Ys^菓(u9_'`'|Gr:N/eb筽 ?鄀:g癶)Ys^剉泂YtR鉙 ?菓(upeW[>f:y鉔?fc垟>f:y0wQ g'`齹3z歔 ?upOe貧 ?蚫\O筫縊隷wc<span lang=EN-US>(</span>>e N珗饄irT ?郠襶匭sS齹麐pe<span lang=EN-US>),</span>緗貧I{O筽05uP[)Ys^貜wQ g陙≧!hck ?hQ蠎 z凈V瀃皊籗畍蛻0/}燫 ?厤}?>f:y ?Ee湒f婭{烺齹0僛 gKQ0s|6R袾蒪0褢蝪鳶 N蛓蠎MO颯汷 愰b0v^NwQ g(嵪?5u酧鱏搹鶴 ?颯錘N梴:g0SbpS:g迯 ?瀃皊饄蠎0皨U_孴梴剉陙≧S ?購汵O筽/f:g癶)Ys^鄀誰詋遙剉0EevQ擽(u_N妽eg妽^踠0</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>5uP[)Ys^颯R:N N縱_孴 N縱_$N蛓觺刧0@b? N縱_c剉/f饄蠎豽(W/e秅 Nb?? ?饄蠎豽 Tc(W/e秅 Nb梽v:N N縱_0顅MRO(u儚:N^踠剉/f N縱_5uP[)Ys^0</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt; font-family:媅SO'>FAlOO4</span><span style='font-size:10.5pt;font-family:媅SO'>媁5uP[)Ys^Yb_觺刧俌㑇@b:y0<span lang=EN-US>1</span>N.曍v<span lang=EN-US>(</span>6Rg<span lang=EN-US>)</span>?<span lang=EN-US> 2</span>N>f:yhV?<span lang=EN-US> 3</span>N豽Xb?<span lang=EN-US>4</span>N饄豽?<span lang=EN-US> 5</span>N4ls^闚?<span lang=EN-US> 6</span>N4ls^寕??</span></p> <p class=p0 style='text-indent:20.0pt'><img width=283 height=156 src="index.files/image001.png" align=left hspace=12><span lang=EN-US style='font-size:10.5pt;font-family:媅SO'>(1)FAlOO4</span><span style='font-size: 10.5pt;font-family:媅SO'>媁;N亯?b/gch</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>饄蠎凈V?<span lang=EN-US>0</span>^?<span lang=EN-US>lOOg</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>麐pe緗?<span lang=EN-US>0.lmg</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>畍蛻饄蠎凈V<span lang=EN-US> (</span>螿<span lang=EN-US>)</span>?<span lang=EN-US>0</span>^?<span lang=EN-US>lOOg</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>峇皊'`<span lang=EN-US>(</span>h芉OP頬<span lang=EN-US>)</span>?<span lang=EN-US>0.OOO2g</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>縹'`飲頬??<span lang=EN-US> 0.OOO5g</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>3z歔鰁魰?<span lang=EN-US>d"6s</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>陙!hxx蠎 lOOg</span></span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>_:g剺韕鰁魰?<span lang=EN-US>l20min. </span></span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt; font-family:媅SO'>(2)</span><span style='font-size:10.5pt;font-family:媅SO'>5uP[)Ys^剉蚫\O</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>(WO(uMR聣遊4ls^闚0俌4ls^闚4l醠OP鹹 ??宼e4ls^寕?? ?O4l醠MO嶯4ls^闚-N胈0</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>.曍v剉蚫\O烺齹?</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>`$<span lang=EN-US>ON</span>_/T>f:yhV.?</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>闟亯{? cN N<span lang=EN-US>ON</span>.? ?>f:yhVhQ甆?鵞>f:yhV剉烺齹蹚L埨h錱 ?<span lang=EN-US>2s</span>T ?>f:y)Ys^剉媁鱏?6qT/f饄蠎!j_0</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>a$<span lang=EN-US>OFF</span>sQ頃>f:yhV.?</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>{? c<span lang=EN-US>OFF</span>.? ?>f:yhV剄mpsS颯0鍌儚曵e魰 N峇O(u)Ys^ ?擽鑒籗5u恘縹0</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>b$<span lang=EN-US>TAR</span>n鰱0籗畍.?</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>n筟hV嶯饄豽 N ?>f:y鶴筟hV剉(嵪??6qT{? c<span lang=EN-US>TAR</span>.? ?>f:y坢悥 ?彇sS鶴皊hQ鰱秗` ?筟hV(嵪?>f:y TAR,</span>>f:yhV:NhQ鰱 ?sS)Ys^n鰱0</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt; font-family:媅SO'>&nbsp;</span></p> <p class=MsoListParagraph style='text-indent:0cm;line-height:18.0pt;layout-grid-mode: char;text-autospace:none'><span style='font-size:10.5pt'> N0瀃寶蚫\Oek</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>1.</span><span style='font-size:10.5pt'>O(uek?</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(1)</span><span style='font-size:10.5pt'>錱 w4ls^闚 ?俌 N4ls^ ?亯惽?4ls^寕??岓?4ls^0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(2)</span><span style='font-size:10.5pt'>?5u恘 ?剺韕<span lang=EN-US>30min</span>T ?筫颯_/T>f:yhV蹚L埻d\O0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(3)</span><span style='font-size:10.5pt'>{? c<span lang=EN-US>ON</span>>f:y.?T ?鶴皊<span lang=EN-US>0.OOOOg</span>饄蠎!j_T筫颯饄蠎0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(4)</span><span style='font-size:10.5pt'>\饄蠎ir{?>e(W饄豽-N.Y ?卂>f:yhV NpeW[3z歔T鶴皊(嵪慤SMO<span lang=EN-US>g,</span>sS颯麐pe ?v^皨U_饄蠎觺済0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>2.</span><span style='font-size:10.5pt'>饄蠎筫誰?</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(1)</span><span style='font-size:10.5pt'>鶹歔饄蠎誰<span lang=EN-US>(</span>蟢齆饄諷體駛x<span lang=EN-US>0.5000g)</span>?</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span style='font-size:10.5pt'>諷Nr^繯h坆椏v ?>eeQ5uP[)Ys^匭 ?卂>f:y芉nx(嵪?T ? c<span lang=EN-US>TAR(</span>n鰱.?<span lang=EN-US>)</span>T ?魐(u[r覊STh坆椏v-Nbaba燫7h ?髞)Ys^O\U^ N>f:y<span lang=EN-US>0.5000g</span>0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>(2)</span><span style='font-size:10.5pt'>愊Q饄蠎誰<span lang=EN-US>(</span>饄諷<span lang=EN-US>0.3-0.4g</span>體駛x$N齆<span lang=EN-US>)</span></span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span style='font-size:10.5pt'>`$(u鋘竳ag諷$N*Nr^繯\鏿og ?鱏R+R:N<span lang=EN-US>1</span>0<span lang=EN-US>2,</span>R+R(WR恎)Ys^ N芉nx饄蛻 ?zz鏿og(嵪懓?:N<span lang=EN-US>m<sub>0</sub></span>孴<span lang=EN-US>m<sub>1</sub></span>0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span style='font-size:10.5pt'>a$(u鋘竳ag諷Nr^繯剉饄蠎鰐 ?燫eQ<span lang=EN-US>1g</span>體駛x墊+g<span lang=EN-US>,</span>(WR恎)Ys^ N芉nx饄蛻<span lang=EN-US>(</span>芉nx髞<span lang=EN-US>0.lmg),</span>皨 NvQ(嵪?:N<span lang=EN-US>m<sub>2</sub></span>KQ0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span style='font-size:10.5pt'>b$(uN\ag鋘竳WY(W饄蠎鰐 N ?諷鶴饄蠎鰐T ?峇(uN\Gr鋘竳SOO鰐講 ?\饄蠎鰐Sb_ ?(u講{弡弐e鸔饄蠎鰐 ?l忹y體駛x<span lang=EN-US>0.3</span>^?<span lang=EN-US>0.4g</span>嶯\鏿og<span lang=EN-US>1</span>-N ?v^芉nx饄鶴饄蠎鰐孴iRYO體駛x螿\(嵪?:N<span lang=EN-US>m<sub>3</sub></span>KQ ?錘 T7h筫誰l忹y諎7h<span lang=EN-US>0.3</span>^?<span lang=EN-US>0.4g</span>嶯\鏿og<span lang=EN-US>2</span>-N ?峇芉nx饄鶴饄蠎鰐孴iRYO諎7h剉螿\(嵪?:N<span lang=EN-US>m<sub>4</sub></span>KQ0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span style='font-size:10.5pt'>c$芉nx饄鶴$N*N鏿og燫諎7h剉(嵪? ?R+R:N<span lang=EN-US>m<sub>5</sub></span>孴<span lang=EN-US>m<sub>6</sub></span>KQ0</span></p> <p class=MsoListParagraph style='line-height:18.0pt;layout-grid-mode:char; text-autospace:none'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>踁0瀃寶penc皨U_0pencYt</span></p> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>?</span><span lang=EN-US style='font-size:10.5pt'>1</span><span style='font-size:10.5pt;font-family:媅SO'> ?鶹歔饄蠎誰皨U_h? </p> <table class=MsoNormalTable border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;border:none'> <tr> <td width=284 valign=top style='width:213.05pt;border:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>!kpe</span></p> </td> <td width=284 valign=top style='width:213.05pt;border:solid windowtext 1.0pt; border-left:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>諎7h蛻?</span><span lang=EN-US style='font-size:10.5pt'>g</span><span style='font-size:10.5pt; font-family:媅SO'> ?</span></p> </td> </tr> <tr> <td width=284 valign=top style='width:213.05pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>1</span></p> </td> <td width=284 valign=top style='width:213.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=284 valign=top style='width:213.05pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>2</span></p> </td> <td width=284 valign=top style='width:213.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> </table> <p class=p0 style='text-indent:21.0pt'><span style='font-size:10.5pt; font-family:媅SO'>?</span><span lang=EN-US style='font-size:10.5pt'>2</span><span style='font-size:10.5pt;font-family:媅SO'> ?愊Q饄蠎誰皨U_h? </p> <table class=MsoNormalTable border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;border:none'> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>饄蠎鱏</span></p> </td> <td width=189 valign=top style='width:142.05pt;border:solid windowtext 1.0pt; border-left:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>1</span></p> </td> <td width=189 valign=top style='width:142.05pt;border:solid windowtext 1.0pt; border-left:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>2</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>zz\鏿og蛻</span><span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>re鶴MR饄蠎鰐</span><span lang=EN-US style='font-size:10.5pt'>+</span><span style='font-size:10.5pt; font-family:媅SO'>7h蛻</span><span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>re鶴諎7h蛻</span><span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>鏿og</span><span lang=EN-US style='font-size:10.5pt'>+</span><span style='font-size:10.5pt; font-family:媅SO'>諎7h蛻</span><span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>饄諷諎7h蛻</span><span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> <tr> <td width=189 valign=top style='width:142.0pt;border:solid windowtext 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>輣鵞頬 <span lang=EN-US style='font-size:10.5pt'>(g)</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> <td width=189 valign=top style='width:142.05pt;border-top:none;border-left: none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt'> <p class=p0><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </td> </tr> </table> <p class=p0><span lang=EN-US style='font-size:10.5pt;font-family:媅SO'>&nbsp;</span></p> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>擭0觺簨</span></p> <p class=p0 style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> <p class=p0><span style='font-size:10.5pt;font-family:媅SO'>mQ0顣槝孴▼簨</span></p> <p class=p0 align=right style='margin-left:147.0pt;text-align:right;text-indent: 21.0pt;text-autospace:ideograph-other'><span lang=EN-US style='font-size:10.5pt'>&nbsp;</span></p> </div> </body> </html>

篇三 :用天平称量物体的质量实验报告单

用天平称量物体的质量实验报告单

            

 

 

…… …… 余下全文

篇四 :实验一 分析天平称量练习及标准溶液配制

实验一 分析天平称量练习及标准溶液的配制

一、实验目的与要求

1. 了解电子天平的构造及使用规则,学会正确使用分析天平。

2. 掌握直接称量法和减量称量法的操作方法,学会称量瓶与干燥器的使用。

3. 注意有效数字的正确使用,培养准确、整齐、简明记录实验原始数据的习惯。

二、实验原理
    分析天平是根据杠杆原理设计而成的,每一项定量分析工作都直接或间接地需要使用分析天平,常用的分析天平有阻尼天平、半自动电光天平、全自动电光天平、单盘电光天平、微量天平和电子天平等。

电子天平根据电磁力平衡原理直接称量。其特点是性能稳定、操作简便、称量速度快、灵敏度高。能进行自动校正、去皮及质量电信号输出。
电子天平的使用方法:水平调节水泡应位于水平仪中心。
    ⑴ 接通电源,预热 30 分钟。

⑵ 打开关 ON ,使显示器亮,并显示称量模式 0.0000g。

⑶ 称量 按 TAR 键 ,显示为零后。 将称量样品放入盘中央,待读数稳定后,该数字即为称物体的质量。

⑷ 去皮称量 按 TAR 键清零,将空容器放在盘中央,按TAR键显示零,即去皮。将称量样品放入空容器中,待读数稳定后,此时天平所示读数即为所称样品的质量。

…… …… 余下全文

篇五 :高老师自用教案分析天平称量练习 有实验报告模板

实验教案  实验四   分析天平称量练习

一、   实验目的

1.掌握直接称量法、固定质量称量法和递减称量法。

  2. 练习并熟练掌握分析天平的基本操作和常用称量方法。

 3  .培养准确,整齐,简明记录实验原始数据的习惯。

二、  实验用品

托盘天平;半机械加码电光分析天平;电子天平;表面皿;称量瓶;纸条;烧杯等。

提问:

一、分析天平的构造

(1)   最重要的是天平梁,天平梁上有什么?玛瑙刀,有几个,方向,还有平衡调节螺丝;

(2)   指针:偏向左说明那个重?

(3)   升降枢:开关,打开,天平梁放下,电源开,灯亮。两种状态。“半开”还是“全开”状态

(4)   吊耳:玛瑙平板和,挂钩、托蹬

(5)   秤盘:左边、右边

(6)   砝码和圈码:圈码的质量:10mg -990mg

1000mg,也说是1g 以上如何读?10mg以下如何?

…… …… 余下全文

篇六 :实验一 分析天平的称量和滴定分析操作练习

湖北工程学院 化学与材料科学学院 分析实验报告(2013)

实验一 分析天平的称量和滴定分析操作练习

(学号:012301314211 姓名:何艳 指导教师:夏彩芬 实验日期:20xx年9月11日)

摘要(Abstracts):为了熟悉电子天平的原理和使用原则,学习其基本操作和常用称量方法,本实验通过观摩老师操作及自己练习来较 为全面的掌握电子天平的使用;为了学习滴定分析常用仪器的洗涤和正确使用方法,确定以甲基橙为指示剂的滴定终点,本实验以盐酸滴定氢氧化钠溶液为基础来练习滴定操作。

In order to be familiar with electronic balance principle and the use of the principle, study its basic operation and common weighing method, this experiment by watching the teacher operation and their practice to a more comprehensive grasp the use of electronic balance. In order to study the titration analysis commonly used instruments of washing and used correctly.Method, methyl orange as the indicator of titration end point, the experiment on the basis of hydrochloric acid titration sodium hydroxide solution to practice titration.

…… …… 余下全文

篇七 :实验一分析天平的称量练习

分析化学实验报告

实验一:分析天平称量练习

班级:                 姓名:                日期:

Ⅰ、实验目的

1.观察分析天平的结构,知道天平的主要部件的名称和作用。

2.学会使用分析天平

3.会用直接称量法和减量称量法称取物质的质量。

Ⅱ、实验仪器与试剂

仪器:万分之一分析天平、称量瓶、干燥器、烧杯

试剂:氯化钠

Ⅲ、实验内容与步骤

1、直接称量法:

称空称量瓶的质量。

(1)准备:

(2)一般性检查:

(3)检查并调节天平的零点:

(4)称量:

(5)读数及记录:

2、减重称量法:

称量三份一定质量的氯化钠样品

将各项数据填入下表。

…… …… 余下全文

篇八 :分析天平实验测试报告

评分标准:

1、分析天平水平、零点调节正确,灵敏度调节达到要求;(20分)

2、物理天平、分析天平使用正确,数据记录无误;(20分)

3、数据处理正确;(40分)

4、问答题答案要点(20分):

(1)用分析天平测物体的质量前,要对待测物体进行粗测。

(2)天平调节以及测量过程中要注意随手关玻璃门。

    (3)只有当判断天平哪一侧较重时,才旋转止动旋钮到底支起横梁,并在判明后慢慢将其止动。不能在横梁支起时打开玻璃门对天平进行操作加减砝码、钩码或取放物体。

    (4)称衡时,被测物体放在左盘,右盘上加砝码。根据待测物体的粗测质量,加适当的钩码和砝码,支起天平,判明轻重后再调整钩码和砝码。调整钩码和砝码依照从重到轻的顺序。

    (5)转动钩码旋钮时,避免用力过猛。取放砝码时要用镊子,用过的砝码要直接放到砝码盒中原来的位置。

(6)称衡后,要检查横梁是否已落下,钩码是否完全吊起,砝码是否完全放入砝码盒中原来的位置,玻璃门是否关上。

分析天平实验测试报告

小球的粗测质量mo =                g.

…… …… 余下全文