Precipitation Reactions TEST

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1. Two solutions were mixed and a solid product was formed. Which one of the following is the name and formula representing the solid product?
A) Potassium chloride (KCl) B) Ammonium carbonate (NH4CO3) C) Calcium nitrate (CaN) D) Sodium hydroxide (NaOH) E) Aluminium hydroxide (Al(OH)3)

2. Solutions of silver nitrate and sodium carbonate were mixed as shown on the video on the right. The balanced overall equation for this reaction is
A) 2AgNO3(aq) + Na2CO3(aq) => 2Ag2CO3(aq) + NaNO3(aq) B) 2AgNO3(aq) + Na2CO3(aq) => Ag2CO3(aq) + 2NaNO3(s) C) AgNO3(aq) + Na2CO3(aq) => Ag2CO3(aq) + NaNO3(s) D) AgNO3(aq) + Na2CO3(aq) => Ag2CO3(s) + NaNO3(aq) E) 2AgNO3(aq) + Na2CO3(aq) => Ag2CO3(s) + 2NaNO3(aq)

3. A solution of calcium nitrate is mixed with a solution of sodium carbonate. A solid is formed. Which one of the following statements is correct?

A) The reaction can be represented by the equation below. calcium nitrate + sodium carbonate => calcium carbonate + sodium nitrate. Where calcium carbonate is an insoluble solid. B) The reaction can be represented by the equation below. calcium nitrate + sodium carbonate => calcium nitrate + carbonate nitrate. Where carbonate nitrate is an insoluble solid. C) The reaction can be represented by the equation below. calcium nitrate + sodium carbonate => calcium carbonate + sodium nitrate. Where sodium nitrate is an insoluble solid. D) The reaction can be represented by the equation below. calcium nitrate + sodium carbonate => calcium sodium + carbonate nitrate. Where calcium sodium is an insoluble solid. E) The reaction can be represented by the equation below. calcium nitrate + sodium carbonate => calcium carbonate + sodium nitrate. Where both sodium nitrate and calcium carbonate are insoluble solids.

4. A silver nitrate solution reacts with a solution of sodium carbonate and a solid is observed to form. Which one of the following statements is correct? Silver = Ag+ Sodium = Na + Carbonate = CO3-2 Nitrate = NO3-
A) The solid is sodium nitrate with the formula Na4NO3. B) The solid is sodium nitrate with the formula Na2NO3. C) The solid is sodium nitrate with the formula NaNO3. D) The solid is silver carbonate with the formula Ag2CO3. E) The solid is silver carbonate with the formula Ag(CO3)3.

5. Solutions of ammonium sulfate and barium chloride were mixed together to form a precipitate. Which one statement below is correct?
A) One of the products is solid ammonium barium. B) Ammonium sulfate is an insoluble compound. C) Barium chloride is an insoluble compound. D) One of the products formed is soluble ammonium chloride. E) One of the products formed is soluble barium sulfate.

6. Solutions of copper sulfate(CuSO4) and potassium chromate(K2CrO4) are mixed together. When writing chemical equations it is important to show the state of the reactants and products. Which one comment below is true?

A) The precipitate formed is copper chromate and the balanced equation for the reaction is CuSO4(s) + K2CrO4(s) => CuCrO4(s) + 2K2SO4(aq) B) The precipitate formed is copper chromate and the balanced equation for the reaction is CuSO4(aq) + K2CrO4(aq) => CuCrO4(s) + K2SO4(aq) C) The precipitate formed is potassium sulfate and the balanced equation for the reaction is CuSO4(aq) + K2CrO4(aq) => CuCrO4(aq) + K2SO4(s) D) The precipitate formed is potassium sulfate and the balanced equation for the reaction is CuSO4(aq) + 2K2CrO4(aq) => CuCrO4(aq) + K2SO4(s) E) The precipitate formed is copper chromate and the balanced equation for the reaction is CuCrO4(s) + K2SO4(s) => CuSO4(s) + KCrO4(s)

7. Solutions of lead nitrate and potassium iodide were mixed as shown on the video on the right. The balanced overall equation for this reaction is
A) Pb(NO3)2(aq) + 2KI(aq) => 2KNO3(aq) + PbI2(s) B) Pb(NO3)2(aq) + KI2(aq) => 2KNO3(aq) + PbI2(aq) C) Pb(NO3)2(s) + 2KI(s) => 2KNO3(s) + PbI2(s) D) Pb(NO3)(aq) + KI(aq) => KNO3(aq) + PbI(s) E) Pb(NO3)2(aq) + K2I(aq) => 2KNO3(aq) + PbI2(s)

8. Solutions of iron(II) sulfate and sodium carbonate are mixed as shown on the right. A dark green precipitate is formed. The balanced overall equation for this reaction is:
A) FeSO4(aq) + Na2CO3(aq) => FeCO3(s) + Na2SO4(aq) B) 2Fe2(SO4)3(aq) + Na2CO3(aq) => FeCO3(s) + Na2SO4(aq) C) FeSO4(aq) + Na2CO3(aq) => FeCO3(aq) + Na2SO4(s) D) FeSO4(aq) + Na2CO3(aq) => FeCO3(s) + 2Na2SO4(aq) E) Fe(NO3)2(aq) + Na2CO3(aq) => FeCO3(s) + 2NaNO3(aq)

9. A solution of potassium chromate(K2CrO4) is reacted with a solution of barium nitrate (Ba(NO3)2). A milky white precipitate was formed as shown on the right. Which one of the following options represents the balanced overall equation for this reaction.
A) 2K2CrO4(aq) + Ba(NO3)2(aq) => BaCrO4(s) + 4KNO3(aq) B) K2CrO4(aq) + Ba(NO3)2(s) => BaCrO4(aq) + 2KNO3(aq) C) K2CrO4(aq) + Ba(NO3)2(aq) => 2BaCrO4(aq) + KNO3(aq) D) K2CrO4(aq) + Ba(NO3)2(aq) => BaCrO4(s) + KNO3(s) E) K2CrO4(aq) + Ba(NO3)2(aq) => BaCrO4(s) + 2KNO3(aq)

10. A precipitation reaction is one which two soluble reactants form an insoluble solid which usually sinks to the bottom of the test tube. The table on the right shows the solubility of some of the products formed when certain chemicals react. Which one of the following represents a precipitation reaction.

A) sodium nitrate + barium chloride -> sodium chloride + barium nitrate. B) mercury sulfate + potassium nitrate -> mercury nitrate + potassium sulfate. C) potassium sulfate + barium hydroxide -> potassium hydroxide + barium sulfate. D) potassium chloride + sodium hydroxide -> potassium hydroxide + sodium chloride. E) potassium carbonate + sodium hydroxide -> potassium hydroxide + sodium carbonate.