Limiting Reactants Worksheet
Explore the concept of limiting reactants in chemical reactions with this Grade 9 science worksheet, featuring multiple choice, fill-in-the-blanks, and short answer questions.
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Limiting Reactants Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. What is a limiting reactant in a chemical reaction?
The reactant that is present in the largest amount.
The reactant that determines the amount of product formed.
The reactant that is left over after the reaction is complete.
The reactant that has the highest molar mass.
2. In the reaction 2H₂ + O₂ → 2H₂O, if you have 4 moles of H₂ and 1 mole of O₂, which is the limiting reactant?
H₂
O₂
H₂O
Neither, both will react completely.
3. The reactant that is completely consumed in a chemical reaction is called the reactant.
4. The amount of product formed in a reaction is limited by the reactant.
5. Excess reactant is the reactant that is after the reaction is complete.
6. Explain the importance of identifying the limiting reactant in a chemical synthesis process.
7. Consider the reaction: N₂ + 3H₂ → 2NH₃. If you have 5 moles of N₂ and 9 moles of H₂, identify the limiting reactant and explain your reasoning.
8. The limiting reactant is always the reactant with the smallest initial mass.
True
False
9. If all reactants are consumed simultaneously in a reaction, there is no limiting reactant.
True
False
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