Question detail
A reaction between 2 moles of A and 3 moles of B produces 4 moles of C. If you start with 5 moles of A and 6 moles of B, which reactant is the limiting reactant?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
A reaction between 2 moles of A and 3 moles of B produces 4 moles of C. If you start with 5 moles of A and 6 moles of B, which reactant is the limiting reactant?
Answer
The limiting reactant is A.
Explanation
This question tests the understanding of limiting reactants by requiring the calculation of the available moles against the required moles based on the balanced equation. Since A is used up first, it limits the reaction.
Common mistake
Confusing Limiting Reactants
Students often confuse the limiting reactant with the reactant in excess, thinking that the limiting reactant is the one that is present in the smallest amount by mass rather than by moles.
To fix this, students should focus on calculating the number of moles of each reactant and identify which one will be completely consumed first in the reaction.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.