Unit 4 Exam Review

Which list includes three types of chemical reactions?

• decomposition, single replacement, and solidification

• decomposition, single replacement, and double replacement

  
  

• solidification, double replacement, and decomposition

• composting, double replacement, and single replacement

Which is the correct equation?

Solid Copper (I)  carbonate decomposes to form solid copper (I) oxide and carbon dioxide gas.

• C2​CO3​→2C2​O+O2​
  

• Cu​CO3​→CuO+CO2

• 2Cu2​CO3​→

  2Cu2​O+3CO2

• Cu2​CO3​→2Cu2​O+CO2

When the following reaction is balanced, the coefficient for the Mg(PO₄)₂  would be:

  ___Al(NO₃)₃+ ___ Mg₃(PO₄)₂ --> ____AlPO₄ +____Mg(NO₃)₂

• 2

• 3

• 4

• 1

___ C₃H₈ + ___ O₂ --> ___ CO₂ + ___ H₂O .  

When this reaction is balanced, the coefficient in front of the water is

_____________.

Write the following equation (not balanced)

A solution of aluminum hydroxide reacts with solid  sodium to form a solution of  sodium hydroxide and solid aluminum.

Based on the written equation, what are the coefficients?

A solution of aluminum hydroxide reacts with solid  sodium to form a solution of  sodium hydroxide and solid aluminum.

• 2,6,2,2,3

• 1,3,2,2,1

• 1,3,1,1,1

• 2,6,2,3,2

For the reaction ___AlBr₃+ ___ Na₂SO₄ -->   ____Al₂(SO₄)₃ + ____NaBr   

What are the reactants?

• aluminum sulfate and sodium bromide

• aluminum bromide and sodium sulfate

• aluminum bromine and sodium sulfide

• aluminum sulfide and sodium bromine

Write the following equation (unbalanced)

Hexane (C6H14) reacts with oxygen and combusts.

What are the coefficients for the following equation.

Hexane (C6H14) reacts with oxygen and combusts.

• 1,10,3,7

• 2,28,6,14

• 2,19,12,14

• 1,9,6,7

What type of reaction is the following:

CaCO3 🡪 CaO + CO2

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion