Question

Solubility product of silver bromide is 5.0 x 10–13. The quantity of potassium bromide (molar mass taken as 120 g of mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is? (1) 1.2 x 10–10 g (2) 1.2 x 10–9 g (3) 6.2 x 10–5 g (4) 5.0 x 10–8 g

Answer 1

I donot have time to solve sorry

Answer 2

and the answer is 1.2*10^-9g that is option 2