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06/14 Chemical Reactions and Stoichiometry Online Quiz Questions

Use this free practice quiz with 20 questions to review 06/14 Chemical Reactions and Stoichiometry, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

In a chemical equation, which substances are written to the left of the reaction arrow?

  1. A

    Reactants

  2. B

    Products

  3. C

    State symbols

  4. D

    Coefficients

02
True or false
1 point

True or false: A net ionic equation removes spectator ions from an ionic reaction.

  1. A

    True

  2. B

    False

03
Choose one
1 point

In the balanced equation for methane combustion, CH4 + O2 -> CO2 + H2O, what coefficient must be placed before O2?

  1. A

    1

  2. B

    2

  3. C

    3

  4. D

    4

04
Choose one
1 point

How should the reaction Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g) be classified by its reaction pattern?

  1. A

    Single-displacement

  2. B

    Synthesis

  3. C

    Decomposition

  4. D

    Double-displacement

05
Choose all
1 point

Which practices are part of the recommended strategy for balancing a chemical equation? Select all correct choices.

  1. A

    Count each element on both sides

  2. B

    Change subscripts to make atom counts match

  3. C

    Balance hydrogen and oxygen last when they occur in several compounds

  4. D

    Reduce coefficients to the smallest whole-number ratio

  5. E

    Ignore state symbols when checking the final equation

06
Fill in the blank
1 point

When balancing an equation, may be changed, but must not be changed.

07
True or false
1 point

True or false: The limiting reactant is the reactant consumed first and therefore determines the maximum possible amount of product.

  1. A

    True

  2. B

    False

08
Choose all
1 point

Which factors can cause the actual yield of a product to be lower than its theoretical yield? Select all correct choices.

  1. A

    Incomplete reaction

  2. B

    Product loss during transfer or purification

  3. C

    A balanced equation conserving atoms

  4. D

    Side reactions

  5. E

    Using the correct mole ratio

09
Written response
1 point

An experiment produces 0.392 g of copper when the theoretical yield is 0.507 g. What is the percent yield? Enter the percentage-point value to the nearest tenth.

10
Written response
1 point

What type of equation removes spectator ions and shows only the species directly involved in an ionic reaction?

11
Fill in the blank
1 point

The maximum product amount predicted by stoichiometry is the , whereas the amount obtained experimentally is the .

12
Open ended
1 point

In a titration, 25.00 mL of HCl requires 23.40 mL of 0.1000 M NaOH. Using HCl + NaOH -> NaCl + H2O, calculate the molarity of the HCl solution and show the essential stoichiometric steps.

13
Choose one
1 point

For complete combustion of a hydrocarbon, which pair of products is expected?

  1. A

    A metal and a nonmetal salt

  2. B

    Two simpler substances from one compound

  3. C

    An acid and a base

  4. D

    Carbon dioxide and water

14
True or false
1 point

True or false: A reported percent yield above 100% usually signals contamination, retained solvent or water, measurement error, or an incorrect theoretical calculation.

  1. A

    True

  2. B

    False

15
Choose one
1 point

Which equation is the correctly balanced equation for the complete combustion of methane?

  1. A

    CH4 + O2 -> CO2 + H2O

  2. B

    CH4 + 2 O2 -> CO2 + 2 H2O

  3. C

    2 CH4 + O2 -> 2 CO2 + H2O

  4. D

    CH4 + 2 O2 -> 2 CO2 + H2O

16
Choose one
1 point

How should the reaction BaCl2(aq) + Na2SO4(aq) -> BaSO4(s) + 2 NaCl(aq) be classified?

  1. A

    Synthesis

  2. B

    Decomposition

  3. C

    Double displacement

  4. D

    Combustion

17
Choose one
1 point

Which statement correctly distinguishes theoretical yield from actual yield?

  1. A

    Theoretical yield is calculated; actual yield is measured.

  2. B

    Theoretical yield is measured; actual yield is calculated.

  3. C

    Both theoretical and actual yields are measured experimentally.

  4. D

    Both theoretical and actual yields are calculated from the balanced equation.

18
Choose one
1 point

Which net ionic equation represents the precipitation that occurs when AgNO3(aq) reacts with NaCl(aq)?

  1. A

    Na+(aq) + NO3-(aq) -> NaNO3(aq)

  2. B

    AgNO3(aq) + NaCl(aq) -> AgCl(s) + NaNO3(aq)

  3. C

    Ag+(aq) + NO3-(aq) -> AgNO3(aq)

  4. D

    Ag+(aq) + Cl-(aq) -> AgCl(s)

19
Written response
1 point

In the reaction HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l), 25.00 mL of HCl requires 23.40 mL of 0.1000 M NaOH. What is the HCl concentration? Report your answer in molarity to four significant figures.

20
Written response
1 point

Using 2 H2(g) + O2(g) -> 2 H2O(l), what mass of water can form from 5.00 g of H2 when O2 is in excess?