How many moles of solute particles are present in one litre of ` 10^(-4 ) ` M potassium sulphate ?

Explanation

In `10 ^(-4)M K _(2) SO _(4)` solution, there are `10 ^(-4)` moles of potassium sulphate.
`K _(2)SO _(4)` molecule contains 3 ions `(2 K ^(+) and 1 SO _(4) ^(2-))`
1 mole of `K _(2) SO _(4)` contains `3 xx 6. 023 xx 10 ^(23)` ions
`10 ^(4) ` mole of `K _(2) SO _(4)` contaisn `3 xx 6.023 xx 10 ^(23) xx 10 ^(-4) ` ions `= 18.069 xx 10 ^(19)`