Qhov sib txawv tseem ceeb ntawm kev tsim thiab molarity yog qhov kev ua tsis zoo tsis xav txog qhov tshwm sim rau cov khoom tom qab nws yaj hauv cov kuab tshuaj thaum xam tus nqi, qhov molarity yuav siv sij hawm rau hauv tus account yuav ua li cas tshwm sim rau tus solute thaum nws yaj thaum noj qhov ntsuas.
Formality yog tag nrho cov concentration ntawm cov tshuaj nyob rau hauv ib tug tov yam tsis hais txog nws cov tshuaj tshwj xeeb. Molarity, ntawm qhov tod tes, yog molar concentration.
Formality yog dab tsi?
Formality yog tag nrho cov concentration ntawm cov tshuaj nyob rau hauv ib tug tov yam tsis hais txog nws cov tshuaj tshwj xeeb. Nyob rau hauv lwm yam lus, formality yog tus naj npawb ntawm formula masses ntawm lub solute muab faib los ntawm lub ntim ntawm tov nyob rau hauv liters. Piv txwv li, yog tias peb yaj sodium chloride 0.1 mol hauv ib liter dej, nws muab peb cov tshuaj uas muaj 0.1 mol sodium cations thiab 0.1 mol chloride anions.
Lub cim rau cov ntawv luv ntawm kev ua haujlwm yog "F." Formality tuaj yeem piav qhia yooj yim raws li ib txoj hauv kev qhia txog qhov concentration ntawm ib qho kev sib xyaw hauv kev daws teeb meem. Qee zaum, formality zoo ib yam li molarity thaum tsis muaj kev sib cais rau hauv ions tshwm sim. Qhov no yog vim qhov kev ntsuas formality tsis coj mus rau hauv tus account yuav ua li cas tshwm sim rau ib tug tshuaj compound thaum nws yog yaj nyob rau hauv cov kuab tshuaj. Yog li ntawd, txawm tias nws yog ib qho electrolyte lossis tsis yog electrolyte, tus qauv yuav yog tus nqi tib yam.
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, moldm-3). Ntxiv mus, peb tuaj yeem qhia lub chav ua M.
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 lub xam ntawm pH, dissociation constants / equilibrium constants, thiab lwm yam. Ntxiv mus, peb yuav tsum tau ua lub conversion 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 peb 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 Kev Ua Haujlwm thiab Molarity yog dab tsi?
Kev ua tau zoo thiab molarity yog qhov tseem ceeb analytical tsis. Qhov sib txawv tseem ceeb ntawm formality thiab molarity yog tias formality tsis xav txog dab tsi tshwm sim rau cov khoom tom qab nws yaj nyob rau hauv ib tug hnyav thaum xam tus nqi, whereas molarity yuav siv sij hawm mus rau hauv tus account dab tsi tshwm sim rau lub solute thaum nws yog yaj thaum noj qhov ntsuas.
Cov hauv qab no qhia txog qhov sib txawv ntawm cov qauv thiab molarity hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Formality vs Molarity
Formality yog tag nrho cov concentration ntawm cov tshuaj nyob rau hauv ib tug tov yam tsis hais txog nws cov tshuaj tshwj xeeb. Molarity yog molar concentration. Qhov sib txawv tseem ceeb ntawm formality thiab molarity yog tias formality tsis xav txog dab tsi tshwm sim rau cov khoom tom qab nws yaj nyob rau hauv ib tug hnyav thaum xam tus nqi, whereas molarity yuav siv sij hawm mus rau hauv tus account dab tsi tshwm sim rau lub solute thaum nws yog yaj thaum noj qhov ntsuas. Nyob rau hauv lwm yam lus, formality tsis nyob ntawm seb lub dissociation ntawm solute tom qab dissolving, thaum molarity nyob ntawm dissociation ntawm solute tom qab dissolving
