Carbonates

• describe the test for carbonates

  put a sample in the test tube

  Add a couple of drops of dilute acid with a dropping pipette

  connect test tube to a test tube of limewater
• what is the result?

  limewater turns cloudy as carbon dioxide bubbles through
• what are carbonates?

  substances that contain (CO3)2- ions
• equation for the dilute acid and carbonate reaction. (think of sodium carbonate and hydrochloric acid)

  Na2CO3 + 2HCl ——> CO2 + 2NaCl + H2O