A student added some copper(II) carbonate powder to a boiling tube containing dilute hydrochloric acid. She observed fizzing and the formation of a blue solution, Y.
Identify the gas that causes the fizzing and describe a test for it.
Gas: Test:
Solution Y contains chloride ions.
The student confirmed this by adding some silver nitrate solution. She observed a white precipitate of silver chloride.
Give the formula of the white precipitate, and name the other solution she should have added before the silver nitrate solution.
Formula of white precipitate: Other solution:
Complete the word equation for the reaction in this test.
copper chloride+silver nitrate→silver chloride+—————————————\text{copper chloride} + \text{silver nitrate} \rightarrow \text{silver chloride} + \text{—————————————}copper chloride+silver nitrate→silver chloride+—————————————
Solution Y contains metal ions. The student wanted to confirm whether the ions were Cu2+\text{Cu}^{2+}Cu2+ or Fe2+\text{Fe}^{2+}Fe2+.
What reagent should she add to decide whether solution Y contains Cu2+\text{Cu}^{2+}Cu2+ or Fe2+\text{Fe}^{2+}Fe2+ ions? State the result of the test in each case.
Reagent: Result with Cu2+\text{Cu}^{2+}Cu2+ ions: Result with Fe2+\text{Fe}^{2+}Fe2+ ions:
