An unknown solution produced the following results with dilute hydrochloric acid bubbles of gas were produced. the gas turned lime water milky. a) Identify the gas produced b) Name the anion present in the solution c) write one chemical test used to confirm the gas

Here's the solution to your chemistry question:

5. An unknown solution produced the following results:

• With dilute hydrochloric acid, bubbles of gas were produced.

• The gas turned lime water milky.

• a) Identify the gas produced: The gas that turns lime water milky is carbon dioxide.

  $$\boxed{\text{Carbon dioxide (CO}_2)}$$

• b) Name the anion present in the solution: Since carbon dioxide gas was produced upon adding dilute hydrochloric acid, the anion present in the original solution is a carbonate ion.

  $$\boxed{\text{Carbonate ion (CO}_3^{2-})}$$

• c) Write one chemical test used to confirm the gas:

  • Pass the gas through lime water (calcium hydroxide solution). If the gas is carbon dioxide, the lime water will turn milky due to the formation of insoluble calcium carbonate.