Stoichiometry: Limiting Reactants and Percentage Yield (LC 2027) (Leaving Cert Chemistry): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the limiting reactant in a chemical reaction?
What is the limiting reactant in a chemical reaction?
Reactant used up first
What is the excess reactant?
What is the excess reactant?
Reactant not completely used up
In Fe + S → FeS with 4 Fe atoms and 6 S atoms, which is the limiting reactant?
In Fe + S → FeS with 4 Fe atoms and 6 S atoms, which is the limiting reactant?
Iron
How many FeS molecules form when 4 Fe atoms react with 6 S atoms?
How many FeS molecules form when 4 Fe atoms react with 6 S atoms?
4 molecules
In the Fe + S example with 4 Fe and 6 S atoms, how many S atoms remain unreacted?
In the Fe + S example with 4 Fe and 6 S atoms, how many S atoms remain unreacted?
2 atoms
What is the formula to convert mass to moles?
What is the formula to convert mass to moles?
What is the first step in identifying the limiting reactant?
What is the first step in identifying the limiting reactant?
Write balanced equation
With 10g Fe (0.18 mol) and 10g S (0.31 mol) in Fe + S → FeS, which is limiting?
With 10g Fe (0.18 mol) and 10g S (0.31 mol) in Fe + S → FeS, which is limiting?
Iron
What mass of FeS forms from 0.18 mol Fe in Fe + S → FeS? (FeS = 87.92 g/mol)
What mass of FeS forms from 0.18 mol Fe in Fe + S → FeS? (FeS = 87.92 g/mol)
15.83 g
What determines the maximum amount of product that can be formed?
What determines the maximum amount of product that can be formed?
Limiting reactant
What happens to the limiting reactant at the end of a reaction?
What happens to the limiting reactant at the end of a reaction?
It is completely consumed
With 10 bread slices and 3 cheese slices (2:1 ratio), how many sandwiches can you make?
With 10 bread slices and 3 cheese slices (2:1 ratio), how many sandwiches can you make?
3 sandwiches