Question

what type of reaction is the following: ca²⁺ + co₃²⁻ → caco₃
acid - base reaction
redox reaction
precipitation reaction

Explanation:

• Acid - base reaction: Involves transfer of protons (H+). Here, no proton transfer.
• Redox reaction: Requires change in oxidation states. Oxidation states of Ca ( + 2), C ( + 4) and O ( - 2) remain same.
• Precipitation reaction: Forms an insoluble solid (precipitate). \(CaCO_3\) is insoluble.

Answer:

precipitation reaction