The gas obtained from the decomposition of sodium hydride with water was passed over red-hot copper (II) oxide.
| December 8, 2020 | education
The gas obtained from the decomposition of sodium hydride with water was passed over red-hot copper (II) oxide. Solid mass decreased by 4 g. Determine the mass of sodium hydride used
1 – NaH + H2O = NaOH + H2
2 – H2 + CuO = Cu + H2O
3 – n (O) = 4/16 = 0.25 mol.
4 – n (H2) = n (O) = 0.25 mol
5 -n (NaH) = n (H2) = 0.25 mol
6 – m (NaH) = n (NaH) * M (NaH) = 0.25 * 24 = 6 grams.
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