Question

25. a. If 2.50 mol of copper and 5.50 mol of silver nitrate are available to react by single replacement, identify the limiting reactant. b. Determine the amount in moles of excess reactant remaining. c. Determine the amount in moles of each product formed. d. Determine the mass of each product formed.

Answer 1

The limiting reagent is Copper (Cu)

First, balance the reaction before determining the limiting reactant.

Cu + 2Ag

Cu(NO3)2 + 2Ag from NO3

Take the beginning material amount and calculate the number of moles of one of the products to identify the limiting reactant. The limiting reactant is the one that produces a product with the fewest moles.

5.50×1.00/2.00=2.75

The limiting reactant is the one that is consumed first and sets a limit on the quantity of product(s) that can be produced. Calculate how many moles of each reactant are present and contrast this ratio with the mole ratio of the reactants in the balanced chemical equation to get the limiting reactant.

Copper is the limiting reactant since there are only 2.50 mol of it and only 2.50 mol of AgNO3 will result from the reaction.

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