Question

A copper sulphate solution contains 1.595% of CuSO4 by weight. Its density is 1.2g/ml , what is its molarity?

Answer 1

given  1.595% of CuSO4.
density  1.2g/ml.
Molecular mass of CuSO4 = 63+32+(4*16) = 159g/mole.
Hence , molarity = moles of CuSO4 in the solution /  Volume = mass of CuSO4 in the solution / molecular mass of CuSO4 * Density
= (1.595*1.2*1000)/(100*159)
= 0.12

Answer 2

Answer:

0.12M

Explanation:

1. Given:

• 1.595% of CuSO4

• Density of CuSO4 is 1.2 gm/ml

2. To find:

• Molarity

3. Solution:

Molecular mass of CuSO4 = 63×32+(14+16)

= 159gm/mol

Hence, Molarity = Mole(solute) /Volume

(solution)

= Mass / Molecular mass × Density

= 1.595 × 1.2× 1000/100×59

= 0.12 M