Question 1

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct net ionic equation?

Accepted Answer

The net ionic equation shows only the species that are involved in the reaction, omitting spectator ions (ions that appear on both the reactant and product side, but do not participate in the reaction). In this reaction, the spectator ions are the nitrate ion (NO3-) from the lead nitrate and the potassium ion (K+) from the potassium iodide. Therefore, the net ionic equation is: Pb2+(aq) + 2I-(aq) → PbI2(s)

Question 2

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

Accepted Answer

All the statements provided are accurate descriptions of molecular, complete, and net ionic equations, as well as the role of spectator ions.

Question 3

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

Accepted Answer

(s) indicates that the product is a solid precipitate that forms during the reaction.

Question 4

The compound sodium sulfate is soluble in water.When this compound dissolves in water,which ion listed below would be present in solution?

Accepted Answer

When sodium sulfate dissolves in water, it dissociates into sodium ions (Na⁺) and sulfate ions (SO₄²⁻). Therefore, the sulfate ion (SO₄²⁻) would be present in the solution.

Question 5

Which of the following compounds is SOLUBLE?

Accepted Answer

Potassium carbonate is soluble in water because potassium ions (K+) form strong ion-dipole interactions with water molecules, allowing the compound to dissolve. Copper carbonate, calcium carbonate, and strontium carbonate are insoluble in water because the metal ions (Cu2+, Ca2+, Sr2+) form stronger bonds with the carbonate ion (CO32-) than with water molecules, resulting in a lack of solubility.

Question 6

If you had an aqueous mixture that contained Ag⁺,K⁺,and Pb⁺² cations,how many different solids could precipitate if a chloride solution was added?

Accepted Answer

The cations Ag+, K+, and Pb2+ can form insoluble chlorides, AgCl, KCl, and PbCl2, respectively. Therefore, two different solids can precipitate when a chloride solution is added. The other cation, ⁺, does not form an insoluble chloride, and hence will remain in solution. The ² cation also does not form an insoluble chloride because it has a higher charge and a larger size, hence will remain in solution.

Question 7

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of

Accepted Answer

When sodium sulfate is added to barium chloride, a precipitate of barium sulfate is formed. This is due to the formation of insoluble barium sulfate, which forms a solid precipitate. The other choices do not form insoluble compounds with sodium sulfate and therefore would not form a precipitate.

Question 8

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which ion(s)would NOT be spectator ions?

Accepted Answer

Pb²⁺ and I^- ions are not spectator ions because they form the precipitate PbI₂.

Question 9

Which is a spectator ion from the following complete ionic equation: Ag⁺(aq)+ NO₃^-(aq)+ K⁺ (aq)+ Br^-(aq)→ AgBr(s)+ K⁺(aq)+ NO₃^- (aq)

Accepted Answer

Spectator ions are ions that do not participate in the chemical reaction and appear unchanged on both the reactant and product sides of the equation. In this equation, $K^+$ is the only ion that appears in the same form on both sides of the equation, making it the spectator ion.

Question 10

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which ion(s)would NOT be present in the net ionic equation?

Accepted Answer

The answer of Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+...

Question 11

What would be the formula of the precipitate that forms when Pb(NO₃)₂ (aq)and K₂SO₄ (aq)are mixed?

Accepted Answer

The formula for the precipitate is determined by finding the combination of ions that will result in a compound with low solubility (i.e. a precipitate). From the reactants Pb2+ and SO42- combine to form PbSO4, which has low solubility and will precipitate out of solution. Neither K+ nor NO3- participate in the formation of the precipitate, so options A, C, D and E can be eliminated. Therefore, option B is the correct formula for the precipitate.

Question 12

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct complete ionic equation?

Accepted Answer

The correct way to write the complete ionic equation is to write each compound as ions. Thus, the correct equation is:
Pb2+(aq) + 2NO3-(aq) + 2K+(aq) + 2I-(aq) → PbI2(s) + 2K+(aq) + 2NO3-(aq)
In option C, the complete ionic equation correctly separates all of the ions in the reaction.

Question 13

Which of the following everyday substances does NOT typically contain an acid?

Accepted Answer

Soap is typically basic, not acidic. It has a high pH level and helps to neutralize acids on the skin.

Question 14

What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?

Accepted Answer

The answer of What type of a reaction occurs when...

Question 15

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which ion would NOT be present in the complete ionic equation?

Accepted Answer

All the ions listed are present in the complete ionic equation, as they are all part of the reactants or products in the reaction.

Question 16

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

Accepted Answer

When a silver nitrate solution is mixed with sodium chloride solution, a precipitation reaction occurs. This is because silver chloride is insoluble in water and forms a white precipitate. The chemical equation for the reaction is: AgNO3 + NaCl → AgCl↓ + NaNO3.

Question 17

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) Which compound would not form ions in the complete ionic equation?

Accepted Answer

PbI2 is the compound that would not form ions in the complete ionic equation because it is a solid precipitate.

Question 18

When solid NaCl is stirred into water,which of the following is NOT true?

Accepted Answer

When solid NaCl is stirred into water, it will dissociate into individual sodium and chloride ions in solution, making statement D false. Therefore, the correct answer is D. Statements A, B, and C are all true.

Question 19

All of the following compounds are soluble in water EXCEPT

Accepted Answer

PbCl2 is the exception; it is only slightly soluble in water, unlike the other compounds listed which are generally considered soluble.

Question 20

Which of the following compounds is SOLUBLE?

Accepted Answer

Aluminum sulfate is a soluble compound, while aluminum hydroxide, aluminum sulfide, and aluminum carbonate are insoluble in water.

Quiz 7: Chemical Reactions

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) What is the correct net ionic equation?

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

The compound sodium sulfate is soluble in water.When this compound dissolves in water,which ion listed below would be present in solution?

Which of the following compounds is SOLUBLE?

If you had an aqueous mixture that contained Ag⁺,K⁺,and Pb⁺² cations,how many different solids could precipitate if a chloride solution was added?

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion(s) would NOT be spectator ions?

Which is a spectator ion from the following complete ionic equation: Ag⁺(aq) + NO₃^-(aq) + K⁺ (aq) + Br^-(aq) → AgBr(s) + K⁺(aq) + NO₃^- (aq)

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion(s) would NOT be present in the net ionic equation?

What would be the formula of the precipitate that forms when Pb(NO₃) ₂ (aq) and K₂SO₄ (aq) are mixed?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) What is the correct complete ionic equation?

Which of the following everyday substances does NOT typically contain an acid?

What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion would NOT be present in the complete ionic equation?

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which compound would not form ions in the complete ionic equation?

When solid NaCl is stirred into water,which of the following is NOT true?

All of the following compounds are soluble in water EXCEPT

Which of the following compounds is SOLUBLE?

Quiz 7: Chemical Reactions

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct net ionic equation?

Which of the following statements about writing molecular,complete and net ionic equations is FALSE?

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

The compound sodium sulfate is soluble in water.When this compound dissolves in water,which ion listed below would be present in solution?

Which of the following compounds is SOLUBLE?

If you had an aqueous mixture that contained Ag+,K+,and Pb+2 cations,how many different solids could precipitate if a chloride solution was added?

A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion(s) would NOT be spectator ions?

Which is a spectator ion from the following complete ionic equation: Ag+(aq) + NO3-(aq) + K+ (aq) + Br-(aq) → AgBr(s) + K+(aq) + NO3- (aq)

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion(s) would NOT be present in the net ionic equation?

What would be the formula of the precipitate that forms when Pb(NO3) 2 (aq) and K2SO4 (aq) are mixed?

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct complete ionic equation?

Which of the following everyday substances does NOT typically contain an acid?

What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion would NOT be present in the complete ionic equation?

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

Considering the following precipitation reaction: Pb(NO3) 2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which compound would not form ions in the complete ionic equation?

When solid NaCl is stirred into water,which of the following is NOT true?

All of the following compounds are soluble in water EXCEPT

Which of the following compounds is SOLUBLE?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) What is the correct net ionic equation?

If you had an aqueous mixture that contained Ag⁺,K⁺,and Pb⁺² cations,how many different solids could precipitate if a chloride solution was added?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion(s) would NOT be spectator ions?

Which is a spectator ion from the following complete ionic equation: Ag⁺(aq) + NO₃^-(aq) + K⁺ (aq) + Br^-(aq) → AgBr(s) + K⁺(aq) + NO₃^- (aq)

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion(s) would NOT be present in the net ionic equation?

What would be the formula of the precipitate that forms when Pb(NO₃) ₂ (aq) and K₂SO₄ (aq) are mixed?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) What is the correct complete ionic equation?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which ion would NOT be present in the complete ionic equation?

Considering the following precipitation reaction: Pb(NO₃) ₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq) Which compound would not form ions in the complete ionic equation?