Unit 4: Chemical Reactions Review

What type of reaction is this?

2 H₂ + O₂ → 2 H₂O

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

hydrogen gas + oxygen gas → water

What type of reaction is this?

2 H₂O → 2 H₂ + O₂

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

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

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

Sodium + water → sodium hydroxide + hydrogen

What type of reaction is this?

3 FeCl₂ + Al₂O₃ → 2 AlCl₃ + 3 FeO

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

Calcium carbide + Oxygen → Calcium + Carbon dioxide

What type of reaction is this?

Zn + CuCl₂ → ZnCl₂ + Cu

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

Potassium iodide + chlorine → potassium chloride + iodine

Rewrite the following sentences as chemical word equations.

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