Question

1 g-atom of `Ca` was burnt in excess of oxygen & the oxide was dissolved in water to make up a one liter of solution. What is the normality of the alkaline solution?

Answer 1

This is a physically impossible situation.

Explanation:

1 g-atom of `"Ca"` will produce 1 g-mol (74 g) of `"Ca(OH)"_2`.

But the solubility of `"Ca(OH)"_2` in water at 20 °C is only 1.73 g/L.

Most of the `"Ca(OH)"_2` will precipitate from the mixture.