# 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?

1 g-atom of $\text{Ca}$ will produce 1 g-mol (74 g) of ${\text{Ca(OH)}}_{2}$.
But the solubility of ${\text{Ca(OH)}}_{2}$ in water at 20 °C is only 1.73 g/L.
Most of the ${\text{Ca(OH)}}_{2}$ will precipitate from the mixture.