Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
When 100.0 mL of 0.100 M AgNO3 solution is mixed with 200.0 mL of 0.100 M NaBr solution in a coffee cup calorimeter, the temperature of the mixed solution rises from 23.48°C to 24.16°C. Ignore the heat absorbed by the calorimeter. Determine the limiting reactant.
A
AgNO3
B
Both AgNO3 and NaBr are limiting
C
Neither AgNO3 nor NaBr is limiting
D
NaBr
Verified step by step guidance
1
Start by writing the balanced chemical equation for the reaction between AgNO3 and NaBr: .
Calculate the moles of AgNO3 in the solution. Use the formula: . For AgNO3, the volume is 100.0 mL (or 0.100 L) and the molarity is 0.100 M.
Calculate the moles of NaBr in the solution using the same formula: . For NaBr, the volume is 200.0 mL (or 0.200 L) and the molarity is 0.100 M.
Compare the moles of AgNO3 and NaBr to determine the limiting reactant. The reactant with fewer moles will be the limiting reactant, as it will be completely consumed first in the reaction.
Consider the stoichiometry of the balanced equation. Since the reaction is 1:1, the reactant with fewer moles is the limiting reactant. Based on the calculations, identify which reactant has fewer moles and thus is the limiting reactant.