Limiting Reagent Calculations (HSC SSCE Chemistry): Quizzes

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Limiting Reagent Calculations
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What is the limiting reagent in a chemical reaction?

The reactant completely consumed

What does the limiting reagent determine?

Maximum amount of product formed

What happens to the excess reagent in a chemical reaction?

Some of it remains unreacted

Which reagent should you use to calculate the amount of product formed?

Only the limiting reagent

What is the first step when solving limiting reagent problems?

Write the balanced chemical equation

Which formula converts mass to moles when given masses of reactants?

n=mMn = \frac{m}{M}

How do you identify which reactant is limiting?

The one that runs out first

If 66 mol H2SO4\text{H}_2\text{SO}_4 reacts with 55 mol Al(OH)3\text{Al(OH)}_3 (ratio 3:23:2), which is limiting?

H2SO4\text{H}_2\text{SO}_4

In the reaction with 66 mol H2SO4\text{H}_2\text{SO}_4 (limiting), how many mol Al2(SO4)3\text{Al}_2(\text{SO}_4)_3 form (ratio 3:13:1)?

22 mol

If 0.02470.0247 mol KI and 0.01450.0145 mol Pb(NO3)2\text{Pb(NO}_3)_2 react (ratio 2:12:1), which is limiting?

KI

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