Sodium hydride reacts with excess water to produce aqueous sodium hydroxide and hydrogen gas: nah (s) h2o (l) → naoh (aq) h2 (g)a sample of nah weighing g will produce 982 ml of gas at 28.0 °c and 765 torr, when the hydrogen is collected over water. the vapor pressure of water at this temperature is 28 torr.
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