Qhov sib txawv tseem ceeb ntawm qhov concentration thiab molarity yog qhov concentration yog cov ntsiab lus ntawm cov kuab tshuaj nyob rau hauv ib qho kev daws whereas lub molarity yog txoj kev qhia cov concentration ntawm ib tug tov.
Kev sib xyaw thiab molarity yog ob qhov tshwm sim tseem ceeb hauv chemistry. Peb siv ob lo lus no los qhia qhov ntsuas qhov ntau ntawm cov khoom. Yog tias koj xav txiav txim siab tus nqi ntawm tooj liab ions hauv kev daws teeb meem, peb tuaj yeem muab nws raws li kev ntsuas ntsuas. Ib yam li ntawd, txhawm rau txiav txim siab qhov concentration, peb yuav tsum muaj cov khoom sib xyaw ua ke. Tsis tas li ntawd, txhawm rau xam qhov concentration ntawm txhua qhov kev sib xyaw ua ke, peb yuav tsum paub txog cov txheeb ze uas tau yaj hauv cov tshuaj. Concentration yog lo lus uas peb siv dav; Txawm li cas los xij, molarity kuj yog ib hom kev ntsuas concentration.
Kev Cuam Tshuam yog dab tsi?
Muaj ntau txoj hauv kev los ntsuas qhov concentration. Lawv yog cov concentration, naj npawb concentration, molar concentration, thiab ntim concentration. Peb muab tag nrho cov no raws li qhov sib piv, qhov twg tus lej yog sawv cev tus nqi ntawm cov kuab tshuaj, thiab tus denominator yog sawv cev tus nqi hnyav. Txoj kev ntawm kev nthuav tawm cov lus sib txawv ntawm txhua txoj kev no.
Daim duab 01: Dilute thiab Concentrated Solutions
Txawm li cas los xij, tus denominator yeej ib txwm yog qhov ntim ntawm cov kuab tshuaj. Nyob rau hauv huab hwm coj concentration, peb muab qhov loj ntawm cov yaj solute nyob rau hauv ib liter ntawm cov kuab tshuaj. Ib yam li ntawd, nyob rau hauv tus naj npawb concentration, peb muab tus naj npawb ntawm solutes, thiab nyob rau hauv molar concentration, moles ntawm solute. Ntxiv mus, nyob rau hauv ntim concentration, peb siv lub ntim ntawm lub solute.
Lwm yam tshaj li qhov no, peb tuaj yeem muab cov concentrations li mole feem uas peb muab cov moles ntawm cov kuab tshuaj nyob rau hauv kev sib raug zoo rau tag nrho cov khoom nyob rau hauv qhov sib tov. Ib yam li ntawd, peb tuaj yeem siv qhov piv ntawm mole, pawg pawg, thiab qhov sib piv loj los qhia qhov concentration. Tsis tas li ntawd, peb tuaj yeem qhia qhov no raws li tus nqi feem pua. Raws li kev xav tau, peb yuav tsum xaiv txoj hauv kev qhia qhov concentration.
Molarity yog dab tsi?
Molarity yog molar concentration. Qhov no yog qhov piv ntawm tus naj npawb ntawm moles ntawm ib yam khoom hauv ib lub ntim ntawm cov kuab tshuaj. Conventionally, qhov hnyav ntim yog muab nyob rau hauv cubic meters. Txawm li cas los xij, rau peb txoj kev yooj yim, peb feem ntau siv litres lossis cubic decimeters. Yog li, chav tsev ntawm molarity yog mol ib litre / cubic decimeter (molL-1, pwm-3). Ntxiv mus, peb tuaj yeem qhia lub chav ua M.
Video 01: Molarity Explained
Piv txwv li, kev daws ntawm 1 mol ntawm sodium chloride yaj hauv dej muaj molarity ntawm 1 M. Molarity yog txoj kev siv ntau tshaj plaws. Piv txwv li, peb siv nws nyob rau hauv xam pH, dissociation constants/equilibrium constants thiab lwm yam. Tsis tas li ntawd, peb yuav tsum tau hloov dua siab tshiab ntawm ib pawg ntawm ib tug muab solute rau nws molar tooj thiaj li yuav muab cov molar concentration. Txhawm rau ua qhov no, peb yuav tsum faib cov huab hwm coj los ntawm qhov hnyav molecular ntawm cov kuab tshuaj. Piv txwv li, yog hais tias xav npaj ib 1 M ntawm poov tshuaj sulfate tov, 174.26 g mol-1 (1 mol) ntawm poov tshuaj sulfate yuav tsum tau yaj nyob rau hauv ib liter dej..
Qhov txawv ntawm Concentration thiab Molarity yog dab tsi?
Molarity yog ib txoj hauv kev qhia txog qhov concentration ntawm cov tshuaj. Yog li ntawd, qhov sib txawv tseem ceeb ntawm cov concentration thiab molarity yog tias cov concentration yog cov ntsiab lus ntawm cov kuab tshuaj nyob rau hauv ib qho kev daws teeb meem whereas lub molarity yog txoj kev qhia cov concentration ntawm cov tshuaj. Ntxiv mus, peb tuaj yeem txiav txim siab qhov concentration li huab hwm coj concentration, tus lej concentration, molar concentration, thiab ntim concentration. Tab sis peb tuaj yeem txiav txim siab qhov molarity li molar concentration xwb. Tsis tas li ntawd, chav ntsuas kev ntsuas ntawm qhov concentration yog raws li txoj kev peb siv los txiav txim siab qhov concentration whereas chav ntsuas ntawm molarity yog mol / L.
Summary – Concentration vs Molarity
Molarity yog ib txoj hauv kev qhia qhov concentration. Qhov sib txawv tseem ceeb ntawm qhov concentration thiab molarity yog qhov concentration yog cov ntsiab lus ntawm cov kuab tshuaj nyob rau hauv ib qho kev daws whereas lub molarity yog txoj kev qhia cov concentration ntawm ib tug tov.
