Question

What is the molarity of a solution of 10% by mass cadmium sulfate, CdSO4 (molar mass = 208.46 g/mol) by mass? The density of the solution is 1.10 g/mL.

a) 0.528 M
b) 0.436 M
c) 0.479 M
d) 0.048 M
e) 22.9 M

Answer 1

a. 0.528 M ..

Step-by-step explanation:

Hello!

In this case, since the given by-mass percent can be written as:

`(10gCdSO_4)/(100g\ sol)`

By using the density and molar mass of the solute, cadmium sulfate, we can compute the molarity, by also making sure we convert from mL to L of solution:

`M=(10gCdSO_4)/(100g\ sol)*(1molCdSO_4)/(208.46gCdSO_4) *(1.10g\ sol)/(1mL\ sol) *(1000mL\ sol)/(1L\ sol) \\\\M=0.528M`

Thereby, the answer is a. 0.528 M .

Best regards.