Chemical Reactions Quiz

Summarize the four types of reactions you've studied in this unit. Match each reaction type with its general form and description.

• A+B→AB
  

• Single Displacement Reaction

• A+BC→AC+B

• Synthesis (Composition) Reaction

• AB+CD→AD+CB

• Double Displacement Reaction

• AB→A+B

• Decomposition Reaction

Identify the equation that correctly shows the decomposition of hydrogen chloride gas, HCl.

• 2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g)

• HCl (g) → H2 (g) + Cl2 (g)

• CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)

• H2 (g) + Cl2 (g) → 2HCl (g)

When silver nitrate and lithium hydroxide solutions are mixed together, a double displacement reaction occurs. Determine the products.

• Silver nitrate

• Silver hydroxide

• Lithium carbonate

• Lithium nitrate

Determine the reaction type in the scenario where electricity is used to break water into hydrogen and oxygen.

The use of hydrogen as a fuel is one possible solution to help reduce climate change. Burning fossil fuels, like coal and oil, produces carbon

dioxide (CO2). This greenhouse gas is a major cause of climate change. In the search for alternatives, research into hydrogen fuel has grown in

recent years.

Determine the reaction type.

• Composition

• Single displacement

• Decomposition

Explain why electricity is needed for this reaction to occur.

One way to release the energy stored in hydrogen fuel is to reverse the reaction given above.

2H2 + O2 → 2H2O Determine the reaction type and explain why hydrogen fuel is a greener alternative to fossil fuels. Refer to the chemical equation in your response.

Define a precipitate.

• A compound containing nitrate ions

• A solid that settles out of solution

• A gas produced by a chemical reaction

• One of the reactants in a precipitation reaction

Identify whether the following statement is true or false: To predict if a precipitation reaction will occur, we need to see if one product will be insoluble.

• True

• False

Determine which of these equations describes a precipitation reaction.

• 2NaOH (aq) + MgBr2 (aq) → Mg(OH)2 (s) + 2NaBr (aq)

• CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

• 2Na (s) + 2HCl (aq) → 2NaCl (aq) + H2 (g)

• NiCl2 (aq) + Mg (s) → MgCl2 (aq) + Ni (s)