Question

1. A solution contains 7.05×10-3 M cobalt(II) nitrate and 9.62×10-3 M copper(II) acetate. Solid sodium sulfide is added slowly to this mixture.

a) What is the formula of the substance that precipitates first? b) What is the concentration of sulfide ion when this precipitation first begins? [S2-] =

2. A solution contains 1.43×10-2 M nickel(II) acetate and 5.04×10-3 M lead nitrate. Solid potassium carbonate is added slowly to this mixture.

a) What is the formula of the substance that precipitates first? b) What is the concentration of carbonate ion when this precipitation first begins? [CO32-] =

Answer 1

As per HomeworkLib rule i answered 1st question