Question

balance the chemical equation. NaOH +AI -------- NaAIO2 +H2​

Answer 1

Answer:

2Al + 6NaOH. 2NaAlO2 + 3H2 + 2Na2O

Aluminum react with sodium hydroxide to produce sodium aluminate, hydrogen and sodium oxide. This reaction takes place at a temperature near 450°C.

Explanation:

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Answer 2

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☞You cannot balance Al + NaOH = NaAlO2 + H2 because that reaction will not run. You can never get 2 oxygen atoms on the right hand side of the equation without also getting 2 Na atoms there. This equation will never balance.

☞What you need is to assume that the NaOH is aqueous, so there is water present. Then:

☞Al + NaOH + H2O = NaAlO2 + 1.5H2(g)

☞ΔG(20C) = -455.5kJ (negative, so the reaction runs)

☞ΔH(20C) = -474.9kJ (negative, so the reaction is exothermic)