Unit 2 AOS 2 - Precipitation Reactions Quiz

What are the solubility rules for common ionic compounds?

• Look for the solubility rules in a cookbook

• Ask your friends for the solubility rules

• Refer to chemistry reference books or online resources

• Check the weather forecast for solubility rules

Explain the concept of insoluble salts and how they form precipitates.

• Insoluble salts are formed when two solutions containing ions that form an insoluble compound are mixed. The insoluble compound then forms a precipitate, which is a solid that separates from the solution.

• Insoluble salts are formed when two solutions containing ions that form a soluble compound are mixed.

• Insoluble salts are formed when two gases are mixed together.

• Insoluble salts are formed when two solids are mixed together.

Write the net ionic equation for the reaction between silver nitrate and sodium chloride.

• Ag+ + Cl- -> Ag2Cl2

• AgNO3 + NaCl -> AgCl + NaNO3

• Ag+ + Cl- -> AgCl

• Ag+ + Na+ -> AgNa

How do you identify spectator ions in a chemical reaction?

• By tasting the solution

• By observing which ions are present on both sides of the chemical equation.

• By smelling the solution

• By observing the color of the solution

Predict the products and write the balanced chemical equation for the reaction between lead(II) nitrate and potassium iodide.

• Pb(NO3)2 + 2KI -> PbI + 2KNO3

• Pb(NO3)2 + KI -> PbI + KNO3

• Pb(NO3)2 + 2KI -> PbI2 + 2KNO2

• Pb(NO3)2 + 2KI -> PbI2 + 2KNO3

Explain the process of predicting products in precipitation reactions.

• Ask a friend to predict the products for you

• Write out the chemical equation and use solubility rules to determine if the products will form a precipitate.

• Use a magic 8-ball to determine the products

• Guess the products randomly without considering solubility rules

According to solubility rules, which common ions are usually soluble in water?

• Group 1 elements, ammonium ion, and nitrate ion

• Transition metals, hydroxide ion, and phosphate ion

• Alkali earth metals, chloride ion, and bromide ion

• Group 17 elements, sulfate ion, and carbonate ion

Describe the formation of precipitates in a chemical reaction.

• The precipitate will always dissolve in water

• The reaction will always produce a gas

• A solid substance may form if the product is insoluble in water.

• The formation of precipitates is not related to solubility

Write the net ionic equation for the reaction between barium nitrate and sodium sulfate.

• Ba(NO3)2 (aq) + Na2SO4 (aq) -> BaSO4 (s)

• Ba^2+ (aq) + 2Na^+ (aq) -> Ba(NO3)2 (s)

• Ba^2+ (aq) + SO4^2- (aq) -> BaSO4 (s)

• Ba^2+ (aq) + 2SO4^2- (aq) -> BaSO4 (s)

How can you determine the products of a precipitation reaction using solubility rules?

• By asking a magic eight ball

• By identifying which combinations of ions will form insoluble compounds

• By flipping a coin

• By guessing randomly