Question

In each example, one of the reactants is in excess. Work out how many moles of the products are formed in each case.

CaO+H2O→Ca(OH)2
a) 2 mol
b) 3 mol
c) 5 mol
d) 0.50 mol

Answer 1

In the reaction between CaO and H2O, a 1:1 ratio exists, thus each mole of CaO yields one mole of Ca(OH)2. Regardless of which reactant is in excess, the number of moles of Ca(OH)2 produced is equivalent to the number of moles of CaO provided.

Step-by-step explanation:

The student in question is seeking to understand how to determine the number of moles of a product formed in a chemical reaction when one reactant is in excess. Specifically, the chemical reaction in question is the reaction between calcium oxide (CaO) and water (H2O) to form calcium hydroxide (Ca(OH)2). The balanced chemical equation for this reaction is CaO + H2O → Ca(OH)2.

For each given amount of reactants:

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Since the reaction is a 1:1 ratio, the number of moles of CaO directly corresponds to the number of moles of Ca(OH)2 produced.