equal moles of water and NaCl are present in a solution hence molarity of NaCl solution is?

Asked by arup.isro | 4th Jun, 2018, 08:04: PM

Expert Answer:

Equal moles of water and NaCl are present in a solution,
 
So, 

Let apostrophe straight s space consider space bothe space have space apostrophe straight X apostrophe space moles

We space know comma

Molarity space equals space fraction numerator No. space of space mole space of space solute over denominator Volume space in space litr end fraction


Density space of space water space is space 1000 space straight g divided by straight l

Molecular space weight space of space straight H subscript 2 straight O space equals space 18

Density space equals space fraction numerator Mass space over denominator Volume end fraction

Volume space equals space Mass over Density

Mass space of space straight H subscript 2 straight O space space equals space space Moles space of space straight H subscript 2 straight O space cross times space Molar space mass space of space straight H subscript 2 straight O

space space space space space space space space space space Volume space equals fraction numerator space 18 space straight X over denominator 1000 end fraction

Molarity space equals space fraction numerator straight X over denominator begin display style bevelled fraction numerator 18 straight X over denominator 1000 end fraction end style end fraction

space space space space space space space space space space space space space equals space space 1000 over 18

space space space space space space space space space space space space space equals 55.55 space straight M
 

Answered by Varsha | 5th Jun, 2018, 10:15: AM