Question

For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °C. One significant figure is sufficient in each answer.

Answer 1

assume salt is Pb(NO3)2

solubility of Pb(NO3)2 at 40C⁰ = 75gm in 100ml of water

                                                  = 750 gm in 1000ml or 1L of water

The remaining amount of undissolved Pb(NO3)2 is zero