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Which of the following pairs of reactants will react together to produce water (H2O) as one of the products? NaOH and H3PO4 MgO and Ca(OH)2 HBr and NaNO3O CaO and H2O
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Which of the following pairs of reactants will react together to produce water (H2O) as one of the products?

NaOH and H3PO4

MgO and Ca(OH)2

HBr and NaNO3O

CaO and H2O

User Dubucha
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1 Answer

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The first option. NaOH and H3PO4. This is an hydroxide and one acid. The [OH] from NaOH and the [H] from the H3PO4 will form water, while PO4 and Na combine to form Na3PO4, as per this reaction:

3 NaOH + H3PO4 = 3 H2O + Na3PO4



User Piotrsz
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