AP Chemistry Unit 4 Review
Authored by Susan Harvey
Chemistry
12th Grade
NGSS covered
Used 312+ times
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This AP Chemistry Unit 4 Review covers stoichiometry, chemical reactions, and oxidation-reduction concepts appropriate for grade 12 students in an Advanced Placement chemistry course. The quiz comprehensively assesses students' mastery of quantitative chemistry, including mole-to-mole conversions using balanced equations, limiting reactant identification, percent yield calculations, and mass-to-mass stoichiometric problems. Students need a solid foundation in balancing chemical equations, understanding molar relationships, applying stoichiometric ratios, and performing multi-step calculations involving molar masses. The questions also evaluate understanding of precipitation reactions, net ionic equations, spectator ion identification, and oxidation number assignments. Students must demonstrate proficiency in recognizing reaction types, predicting products, and applying solubility rules to determine which compounds will precipitate from aqueous solutions. Created by Susan Harvey, a Chemistry teacher in US who teaches grade 12. This quiz serves as an excellent comprehensive review tool for students preparing for AP Chemistry assessments on chemical reactions and stoichiometry. Teachers can deploy this quiz as a pre-unit diagnostic to identify knowledge gaps, use individual sections for targeted practice on specific concepts like limiting reactants or oxidation numbers, or assign it as homework to reinforce classroom instruction. The variety of question formats makes it ideal for formative assessment, allowing educators to gauge student understanding before high-stakes testing. This assessment aligns with AP Chemistry Learning Objectives related to chemical reactions (LO 3.8, 3.9) and quantitative chemistry (LO 3.4, 3.5), specifically addressing Big Idea 3 concerning chemical reactions and their representation through balanced equations and stoichiometric relationships.
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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?
13.8 g
3.86 g
124 g
198.3 g
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the percent yield of the following reaction if 145g of P2O5 reacts with 40 grams of water, but you only collect 112 grams of phosphoric acid?
3 H2O + P2O5 -> 2H3PO4
80%
85%
77%
58%
Tags
NGSS.HS-PS1-7
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Balance the reaction: _AlBr3 + _K2SO4 → _KBr + _Al2(SO4)3
6 AlBr3 + 1 K2SO4 → 6 KBr + 1 Al2(SO4)3
2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3
1 AlBr3 + 1 K2SO4 → 2 KBr + 3 Al2(SO4)3
2 AlBr3 + 3 K2SO4 → 1 KBr + 2 Al2(SO4)3
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4NH3+ 6NO --> 5N2 + 6H2O
NH3
NO
N2
water
Tags
NGSS.HS-PS1-7
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