Qhov sib txawv tseem ceeb ntawm gram sib npaug thiab qhov hnyav sib npaug yog qhov sib npaug gram piav qhia tias qhov loj ntawm ib qho sib npaug yog muab rau hauv chav tsev ntawm gram whereas qhov hnyav sib npaug piav qhia qhov hnyav ntawm ib qho sib npaug hauv ib chav ntsuas.
Gram sib npaug thiab qhov hnyav sib npaug yog ob nqe lus uas siv dav hauv chemistry rau kev suav tshuaj. Cov ntsiab lus no kuj muaj siv nyob rau hauv analytical chemistry (nyob rau hauv volumetric thiab gravimetric tsom xam) thiab nyob rau hauv polymer chemistry.
Gram sib npaug yog dab tsi?
Gram sib npaug yog qhov loj ntawm qhov sib npaug hauv chav tsev ntawm grams. Nws piav qhia qhov loj hauv grams ntawm ib lub caij, pab pawg, lossis ib qho sib xyaw. Txawm li cas los xij, lub sij hawm no txawv ntawm lub sij hawm sib npaug qhov hnyav raws li qhov ntsuas ntsuas. Qhov no yog vim hais tias qhov loj tuaj yeem ntsuas nyob rau hauv cov chav sib txawv thiab qhov sib npaug txhais tau tias yog ib feem ntawm cov khoom siv. Tom qab ntawd qhov loj ntawm qhov ntawd tau qhia hauv chav ntsuas rau qhov loj ntawm cov khoom tshwj xeeb.
Qhov hnyav sib npaug yog dab tsi?
Qhov hnyav sib npaug yog hais txog qhov loj ntawm ib qho sib npaug ntawm cov khoom uas suav tias yog. Nws tuaj yeem siv nrog cov khoom, ib pawg ntawm cov ntsiab lus lossis cov khoom sib xyaw. Tsis tas li ntawd, lo lus no tuaj yeem txhais tau tias yog qhov loj ntawm cov khoom paub uas tuaj yeem ua ke lossis hloov pauv qhov ntau ntawm lwm yam khoom. Piv txwv li, qhov sib npaug ntawm qhov hnyav ntawm ib lub caij yog qhov loj uas ua ke nrog lossis hloov chaw 1.008 grams hydrogen, 8.0 grams oxygen lossis 35.5 grams chlorine. Cov txiaj ntsig no tau los ntawm kev faib cov atomic loj los ntawm cov nqi valence feem ntau; e.g. Qhov hnyav sib npaug ntawm cov pa oxygen tau txais los ntawm 16gmol-1/2=8.0g.
Txawm li cas los xij, rau cov tshuaj tiv thaiv acid-puag, qhov hnyav sib npaug yog hais txog qhov loj uas tshwm sim nrog mole ntawm hydrogen ions. Chav tsev ntawm qhov hnyav sib npaug yog qhov hnyav. Yog li ntawd, qhov no tsis yog ib tug dimensionless tus nqi. Feem ntau, gram yog chav tsev siv los ntsuas qhov hnyav sib npaug. Keeb kwm, tus nqi ntawm qhov sib npaug qhov hnyav yog txiav txim siab sim. Tab sis, peb tuaj yeem suav nws siv cov molar pawg ib yam. Piv txwv li, qhov sib npaug qhov hnyav tuaj yeem xam los ntawm kev faib cov molar loj los ntawm qhov zoo lossis qhov tsis zoo ntawm cov hluav taws xob hluav taws xob tsim los ntawm kev sib cais ntawm qhov sib xyaw.
Daim duab 1: Acid-Base titration (cov kev suav hauv cov txheej txheem titration no siv qhov sib npaug ntawm cov kua qaub thiab cov hauv paus kom tsis txhob muaj teeb meem hauv kev suav)
Hauv kev suav tshuaj lom neeg, peb tuaj yeem txiav txim siab qhov hnyav sib npaug los ntawm kev faib cov molar pawg ntawm cov khoom xav tau los ntawm cov lej ntawm cov moles ntawm hydrogen ions uas tsim los ntawm cov khoom sib xyaw no thaum tawg hauv dej. Piv txwv li, molar loj ntawm sulfuric acid yog 98 g / mol. Nws tsim ob moles ntawm hydrogen ions thaum tawg. Yog li ntawd, qhov sib npaug hnyav yog 98/2=49geq-1
Qhov txawv ntawm Gram sib npaug thiab qhov hnyav npaum li cas?
Gram sib npaug thiab qhov hnyav sib npaug yog cov ntsiab lus tseem ceeb uas peb siv hauv kev suav tshuaj. Qhov sib txawv tseem ceeb ntawm gram sib npaug thiab qhov hnyav sib npaug yog qhov sib npaug gram piav qhia tias qhov loj ntawm ib qho sib npaug yog muab rau hauv chav tsev ntawm gram whereas qhov hnyav sib npaug piav qhia qhov loj ntawm ib qho sib npaug hauv ib chav ntsuas.
Cov lus qhia hauv qab no qhia txog qhov sib txawv ntawm gram sib npaug thiab qhov hnyav sib npaug.
Summary – Gram sib npaug vs Qhov hnyav sib npaug
Gram sib npaug thiab qhov hnyav sib npaug yog cov ntsiab lus tseem ceeb uas peb siv hauv kev suav tshuaj. Qhov sib txawv tseem ceeb ntawm gram sib npaug thiab qhov hnyav sib npaug yog qhov sib npaug gram piav qhia tias qhov loj ntawm ib qho sib npaug yog muab rau hauv chav tsev ntawm gram whereas qhov hnyav sib npaug piav qhia qhov loj ntawm ib qho sib npaug hauv ib chav ntsuas.
