91Ó°ÊÓ

Aqueous calcium chloride reacts with aqueous potassium carbonate in a double- displacement reaction. Write a halanced equation to describe this reaction.

What substance is always a reactant in a combustion reaction?

Write a formula for the product of the combustion reaction of the following elements with molecular oxygen. (a) \(\mathrm{Mg}\) (b) \(\mathrm{Fe}\) (c) Li (d) \(\mathrm{S}_{\mathrm{z}}\) (e) \(\mathrm{N}_{2}\)

Indicate whether each of the following substances is an electrolyte or a nonelectrolyte. (a) \(\mathrm{NaOH}(a q)\) (b) \(\mathrm{HCl}(a q)\) (c) \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}(a q)\) (sucrose solution)

In which type of equation-molecular, ionic, or net ionic-do we find spectator ions?

When aqueous solutions of potassium chromate and barium chloride mix, a yellow solid forms. (a) Identify the solid. (b) Write a balanced molecular equation for the reaction. (c) Write a balanced ionic equation for the reaction. (d) Identify any spectator ions in the reaction. (c) Write a balanced net ionic equation for the reaction.

Aqueous calcium chloride reacts with aqueous silver nitrate to form a precipitate of silver chloride and a solution of calcium nitrate. Write a net ionic equation for this reaction.

Aqueous chromium(III) sulfate reacts with aqueous sodium hydroxide to form a precipitate of chromium(III) hydroxide and a solution of sodium sulfate. Write a net ionic equation for this reaction.

Heating causes the copper mineral malachite, \(\mathrm{CuCO}_{3}-\mathrm{Cu}(\mathrm{OH})_{2}\), wo decompose. Write a balanced equation for the reaction.

A solution contains cobalt(II) chloride. Identify three metals that could be placed in the solution to cause the cobalt to be plated out as a metal.