Question

To make 0.01 mole, which of the following has maximum mass ? 1. NaHC03 2. Na2CO3 3. Na2SO4 4. Na2C204

Answer 1

Explanation:

Mass of 1 mol NaHCO

3

= 23+1+12+3×16 = 84 g.

Mass of 1 mol Na

2

CO

3

= 23×2+12+3×16 = 106 g.

Mass of 1 mol Na

2

SO

4

= 23×2+32+4×16 = 142 g.

Mass of 1 mol Na

2

C

2

O

4

= 23×2+12×2+4×16 = 134 g.

Now, Mass of 0.01 mol = 0.01×Mass of 1 mol

So, Na

2

SO

4

has the maximum mass.