Unit 4: Chemical Reactions Review

What type of reaction is this?

2 H₂ + O₂ → 2 H₂O

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Write and balance the skeleton equation for the following word equation (Remember: Diatomics come in pairs of two!):

hydrogen gas + oxygen gas → water

• 2 H + O → H₂O

• 4 H + O₂ → 2 H₂O

• 2 H₂ + O₂ → 2 H₂O

• 4 H + 2 O → 2 H₂O

Tags

NGSS.HS-PS1-7

What type of reaction is this?

2 H₂O → 2 H₂ + O₂

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Write and balance the skeleton equation for the following (Remember: Diatomics come in pairs of two!):

Iron (III) oxide + hydrogen gas → water + iron

• Fe₂O₃ + 6 H → 3 H₂O + 2 Fe

• FeO + H₂ → H₂O + Fe

• Fe₂O₃ + 3 H → 3 H₂O + 2 Fe

• Fe₂O₃ + 3H₂ → 3 H₂O + 2 Fe

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

Write and balance the skeleton equation for the following (Remember: Diatomics come in pairs of two!):

Sodium + water → sodium hydroxide + hydrogen

• Na + H₂O → NaOH + H

• 2 Na + 2 H₂O → 2 NaOH + H₂

• Na + 2 H₂O → 3 NaOH + H₂

• 2 Na + 4 H₂O → 2 NaOH + 2 H₂

Tags

NGSS.HS-PS1-7

What type of reaction is this?

3 FeCl₂ + Al₂O₃ → 2 AlCl₃ + 3 FeO

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Write and balance the skeleton equation for the following (Remember: Diatomics come in pairs of two!):

Calcium carbide + Oxygen → Calcium + Carbon dioxide

• Ca₂C + 2 O → 2 Ca + CO₂

• 2 Ca₂C + O → 3 Ca + CO₂

• Ca₂C + O₂ → 2 Ca + CO₂

• 4 Ca₂C + O → 3 Ca + CO₂

Tags

NGSS.HS-PS1-7

What type of reaction is this?

Zn + CuCl₂ → ZnCl₂ + Cu

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Write and balance the skeleton equation for the following (Remember: Diatomics come in pairs of two!):

Potassium iodide + chlorine → potassium chloride + iodine

• KI + Cl → KCl + I

• 2 KI + 2 Cl₂ → 2 KCl + I₂

• 2 KI + Cl₂ → 2 KCl + 3 I₂

• 2 KI + Cl₂ → 2 KCl + I₂

Rewrite the following sentences as chemical word equations.

Water reacts with powdered sodium oxide to produce a solution of sodium hydroxide.

• Water + Sodium + oxide → Sodium hydroxide

• Water + Sodium oxide → Sodium hydroxide

• Water + Sodium + oxide → Sodium + hydroxide

• Sodium oxide → Sodium hydroxide

Tags

NGSS.MS-PS1-1