Expressing Concentration Of Solutions

Key Idea: First write balanced chemical reaction and then find the answer.

BaC%7B%7Bl%7D_%7B2%7D%7D%2B%7B%7BH%7D_%7B2%7D%7DS%5Cxrightarrow%7B%7B%7D%7DBaS%2B2HCl

Molecular mass of

%7B%7BH%7D_%7B2%7D%7DS%3D1%5Ctimes%202%2B32%3D34

Molecular mass of

BaS%3D137%2B32%3D169

Given mass of

BaS%3D1.69%5C%2Cg

According to reaction.

%5Cbecause

169%5C%2Cg

%5Ctext%7BBaS%7D

is obtained by

%5Ctext%7B%3D%7D%5C%2C%5Ctext%7B34%7D%5C%2C%5Ctext%7Bg%7D%5C%2C

%7B%7BH%7D_%7B2%7D%7DS

%5Ctherefore

1.69 g of

%5Ctext%7BBaS%7D

is obtained by

%3D%5Cfrac%7B34%7D%7B169%7D%5Ctimes%201.69

%3D0.34%5C%2Cg%5C%2C%5Ctext%7Bof%7D%5C%2C%7B%7B%5Ctext%7BH%7D%7D_%7B%5Ctext%7B2%7D%7D%7D%5Ctext%7BS%7D

Chapter Questions
1 MCQs