Unit 4: Chemical Reactions Review

Which of the following is the correct balanced equation for Cu₂O₃ → Cu + O₂

• Cu₂O₂ → 2Cu + O₂
• 2Cu₂O₃ → 4Cu + 3O₂
• 3Cu₂O₃ → 6Cu + 3O₂
• 2Cu₂O₃ → 2Cu + 3O₂

Which of the following is the correct balanced equation for Mg + O₂ → MgO

• 2Mg + O₂ → 4MgO
• Mg + O₂ → 2MgO
• 2Mg + O₂ → 2MgO
• Mg + O₂ → MgO₂

Tags

NGSS.HS-PS1-7

Which of the following is the correct balanced equation for H₂S + KBrO₃ → K₂S + HBrO₃

• H₂S + KBrO₃ → K₂S + HBrO₃
• 2H₂S + 3KBrO₃ → K₂S + 2HBrO₃
• 3H₂S + KBrO₃ → 3K₂S + HBrO₃
• H₂S + 2KBrO₃ → K₂S + 2HBrO₃

Write the following chemical reactions:
Potassium reacts with nickel (III) chloride to yield potassium chloride plus nickel.

• K + NiCl₃ → KCl + Ni
• K + Ni₃Cl → K₇Cl + Ni
• K + Ni₃Cl → KCl + Ni
• K₂ + NiCl₃ → KCl + Ni₂

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Write the following chemical reactions:
Calcium oxide combines with water to form calcium hydroxide.

• Ca₂O₂ + H₂O → Ca(OH)₂
• CaO + H₂O → CaH₂
• Ca₂O₂ + H₂O → CaH₂
• CaO + H₂O → Ca(OH)₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Determine the type of reaction for the following: 
2 K + FeCl₂ → 2KCl + Fe

• Single Replacement
• Double Replacement
• Synthesis
• Combustion

Tags

NGSS.MS-PS1-2

Determine the type of reaction for the following: 
H₂ + 2O₂ → 2H₂O

• Single Replacement
• Double Replacement
• Synthesis
• Combustion

Determine the type of reaction for the following: 
2AgNO₃ + Ca(OH)₂→ Ca(NO₃)₂ + 2Ag₂O

• Single Replacement
• Double Replacement
• Synthesis
• Decomposition

Determine the type of reaction for the following: 
2CuI→ Cu + I₂

• Single Replacement
• Double Replacement
• Synthesis
• Decomposition

Determine the solubility for the following: CaCO₃

• Solid
• Aqueous
• Gas
• Liquid