CBSE Class 11-science Answered

1 M CUSO₄ solution means 1 mole of CuSO₄ in 1 liter of solution.

(1 liter = 1000 ml)

Therefore,  100 ml of 1 M CUSO4 solution contains 0.1 mole of CuSO4 in 100 ml of solution.

1 mole of CuSO₄ contains 1 mole of SO₄^-2 ions and 1 mole of Cu²⁺ ions.

So,  100 ml of 1 M CuSO₄ solution contains 0.1 mole of SO₄^-2 ions in 100 ml of solution.

1 mole of ion = 6.02 x 10²³ ions

0.1 moles  x 6.02 x 10²³ ions per mole = 6.02 x 10²² ions

100 ml of 1 M CuSO₄ solution contains 6.02 x 10²² sulphate ions.