Precipitation Reactions & Net Ionic Equations

Front

What is a precipitation reaction?

Back

A precipitation reaction is a chemical reaction in which two soluble salts react in solution to form an insoluble salt, known as a precipitate.

Front

What is a net ionic equation?

Back

A net ionic equation shows only the species that participate in a chemical reaction, omitting the spectator ions that do not change during the reaction.

Front

Which ions are considered spectator ions?

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged in the solution.

Front

What is the solubility rule for potassium compounds?

Back

Potassium compounds are generally soluble in water.

Front

What is the solubility rule for carbonates?

Back

Most carbonates are insoluble in water, except for those of alkali metals and ammonium.

Front

What happens when magnesium chloride reacts with sodium?

Back

Magnesium chloride reacts with sodium to produce sodium chloride and magnesium.

Front

Write the complete ionic equation for the reaction of lead(II) nitrate and potassium iodide.

Back

Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) becomes Pb^2+(aq) + 2NO3^-(aq) + 2K^+(aq) + 2I^-(aq) → PbI2(s) + 2K^+(aq) + 2NO3^-(aq).

Front

What is the precipitate formed in the reaction of lead(II) nitrate and potassium iodide?

Back

The precipitate formed is lead(II) iodide (PbI2), which is insoluble in water.

Front

Which of the following compounds is soluble: copper carbonate, calcium carbonate, potassium carbonate, or strontium carbonate?

Back

Potassium carbonate is soluble.

Front

In the reaction of sodium chloride with silver nitrate, which ions are the spectator ions?

Back

The spectator ions are sodium (Na^+) and nitrate (NO3^-).