How can saline hydrides remove traces of water from organic compounds?

(N/A) Saline hydrides are ionic in nature. They react with water to form a metal hydroxide along with the liberation of hydrogen gas.
The reaction of saline hydrides with water can be represented as:
$AH_{(s)} + H_2O_{(l)} \to AOH_{(aq)} + H_{2(g)}$
(where,$A = Na, Ca, \dots$)
When added to an organic solvent,they react with water present in it. Hydrogen gas escapes into the atmosphere,leaving behind the metallic hydroxide. The dry organic solvent can then be distilled over.