Question 1

Which is a spectator ion from the following complete ionic equation: H⁺(aq)+ Br^-(aq)+ K⁺ (aq)+ OH^-(aq)→ H₂O(l)+ K⁺(aq)+ Br^- (aq)

Accepted Answer

The answer of Which is a spectator ion from the...

Question 2

What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

Accepted Answer

The net ionic equation for the reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) involves the hydrogen ion (H+) from the acid reacting with the hydroxide ion (OH-) from the base to form water (H2O), which is represented in choice C.

Question 3

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq)+ K₂CO₃(aq)→ H₂O(l)+ CO₂(g)+ 2KCl(aq) 2.CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(l) 3.2HCl(aq)+ K₂S(aq)→ H₂S(g)+ 2KCl(aq)

Accepted Answer

A gas evolution reaction is a reaction where gas is produced as a product. In reaction 1, CO gas is produced, in reaction 2, CO gas is consumed while HS2 gas is produced, and in reaction 3, H2S gas is produced. Therefore, only reaction 1 and 3 are gas evolution reactions. Hence, the answer is B.

Question 4

Identify the oxidation-reduction reactions among the following: 1.Zn(s)+ Cu²⁺(aq)→ Zn²⁺(aq)+ Cu(s) 2.2 Na(s)+ Cl₂(aq)→ 2NaCl(s) 3.2 Mg(s)+ O₂(g)→ 2 MgO

Accepted Answer

All the reactions involve transfer of electrons from one species to another, indicating they are oxidation-reduction reactions. In reaction 1, Zn is oxidized and Cu2+ is reduced. In reaction 2, Na is oxidized and Cl2 is reduced. In reaction 3, Mg is oxidized and O2 is reduced.

Question 5

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

Accepted Answer

When hydrochloric acid is reacted with ammonium carbonate, the products formed are ammonium chloride, water and carbon dioxide gas. Therefore, the gas produced in the reaction is carbon dioxide (option D).

Question 6

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 7

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 complete ionic equation for the given precipitation reaction would include all soluble ions written as their separate ions and all insoluble or weak electrolytes written as their molecular formulas. Thus, the correct complete ionic equation would be:
Pb2+(aq) + 2NO3-(aq) + 2K+(aq) + 2I-(aq) → PbI2(s) + 2K+(aq) + 2NO3-(aq)
Option C is the closest to this equation, although it includes incorrect subscripts for the nitrate ion (NO3 instead of NO3-). All other options are incorrect in various ways.

Question 8

What type of a reaction occurs when potassium metal reacts with fluorine gas?

Accepted Answer

When potassium metal reacts with fluorine gas, an oxidation-reduction reaction occurs. Potassium is oxidized while fluorine is reduced. This reaction results in the formation of potassium fluoride, a salt.

Question 9

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

Accepted Answer

Soap is typically a basic substance, not an acidic substance.

Question 10

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

Accepted Answer

Sodium hydroxide (NaOH) is a strong base and acetic acid (CH3COOH) is a weak acid. When NaOH is added to CH3COOH, an acid-base neutralization reaction occurs where the OH- ions from NaOH react with H+ ions from CH3COOH to form water (H2O) and sodium acetate (NaCH3COO). This is a type of double displacement reaction. The reaction can be represented by the equation: CH3COOH + NaOH → NaCH3COO + H2O.

Question 11

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

Accepted Answer

The answer of What is the complete ionic equation for...

Question 12

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

Accepted Answer

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

Question 13

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

Accepted Answer

All the statements accurately describe the characteristics of molecular, complete ionic, and net ionic equations, as well as the role of spectator ions in these equations.

Question 14

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

Accepted Answer

Hydroxides do not undergo gas evolution reactions when acid is added. Sulfides may produce hydrogen sulfide gas (H2S), carbonates produce carbon dioxide gas (CO2), and bisulfites produce sulfur dioxide gas (SO2) when reacted with acid.

Question 15

When a solution of MgCl₂ and one of AgNO₃ are mixed,the net ionic equation is:

Accepted Answer

The net ionic equation for the reaction between MgCl2 and AgNO3 involves the precipitation of AgCl, where the chloride ions (Cl-) from MgCl2 react with the silver ions (Ag+) from AgNO3 to form solid silver chloride (AgCl). Mg2+ and NO3- ions are spectator ions and do not participate directly in the reaction, hence they are not included in the net ionic equation.

Question 16

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

Accepted Answer

The correct formula for hydrochloric acid is HCl and the correct formula for potassium hydroxide is KOH. The products of the reaction are water (H2O) and potassium chloride (KCl). The balanced equation is: HCl + KOH → H2O + KCl. Choice D represents this equation.

Question 17

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 a sodium chloride solution, a precipitation reaction occurs. This is because silver ions from the silver nitrate solution and chloride ions from the sodium chloride solution combine to form solid silver chloride, which precipitates out of the solution.

Question 18

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

Accepted Answer

The answer of Which of the following would NOT be...

Question 19

Which of the following is NOT an acid?

Accepted Answer

All the options given represent acids when decoded from Unicode to chemical formulas: A) HClO (Hypochlorous acid), B) HNO (Nitroxyl), C) H2CO3 (Carbonic acid), D) H2SO4 (Sulfuric acid). Therefore, none of the options listed is NOT an acid.

Question 20

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 only includes the species that participate in the reaction and excludes spectator ions. In this case, Pb(NO₃)₂(aq) and KI(aq) dissociate in water to form Pb2+(aq), NO3-(aq), K+(aq), and I-(aq). Only Pb2+ and I- react to form the solid PbI2, so they are the only species included in the net ionic equation. Thus, the correct net ionic equation is: Pb2+(aq) + 2I-(aq) → PbI2(s)

Quiz 7: Chemical Reactions

Which is a spectator ion from the following complete ionic equation: H⁺(aq) + Br^-(aq) + K⁺ (aq) + OH^-(aq) → H₂O(l) + K⁺(aq) + Br^- (aq)

What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq) + K₂CO₃(aq) → H₂O(l) + CO₂(g) + 2KCl(aq) 2.CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) 3.2HCl(aq) + K₂S(aq) → H₂S(g) + 2KCl(aq)

Identify the oxidation-reduction reactions among the following: 1.Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s) 2.2 Na(s) + Cl₂(aq) → 2NaCl(s) 3.2 Mg(s) + O₂(g) → 2 MgO

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

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) What is the correct complete ionic equation?

What type of a reaction occurs when potassium metal reacts with fluorine gas?

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

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

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

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

When a solution of MgCl₂ and one of AgNO₃ are mixed,the net ionic equation is:

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

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

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

Which of the following is NOT an acid?

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

Quiz 7: Chemical Reactions

Which is a spectator ion from the following complete ionic equation: H+(aq) + Br-(aq) + K+ (aq) + OH-(aq) → H2O(l) + K+(aq) + Br- (aq)

What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq) + K2CO3(aq) → H2O(l) + CO2(g) + 2KCl(aq) 2.CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) 3.2HCl(aq) + K2S(aq) → H2S(g) + 2KCl(aq)

Identify the oxidation-reduction reactions among the following: 1.Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) 2.2 Na(s) + Cl2(aq) → 2NaCl(s) 3.2 Mg(s) + O2(g) → 2 MgO

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

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) What is the correct complete ionic equation?

What type of a reaction occurs when potassium metal reacts with fluorine gas?

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

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

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

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

When a solution of MgCl2 and one of AgNO3 are mixed,the net ionic equation is:

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

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

Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite?

Which of the following is NOT an acid?

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

Which is a spectator ion from the following complete ionic equation: H⁺(aq) + Br^-(aq) + K⁺ (aq) + OH^-(aq) → H₂O(l) + K⁺(aq) + Br^- (aq)

As defined in the text,identify the "gas evolution" reactions among the following: 1.2HCl(aq) + K₂CO₃(aq) → H₂O(l) + CO₂(g) + 2KCl(aq) 2.CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) 3.2HCl(aq) + K₂S(aq) → H₂S(g) + 2KCl(aq)

Identify the oxidation-reduction reactions among the following: 1.Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s) 2.2 Na(s) + Cl₂(aq) → 2NaCl(s) 3.2 Mg(s) + O₂(g) → 2 MgO

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) What is the correct complete ionic equation?

When a solution of MgCl₂ and one of AgNO₃ are mixed,the net ionic equation is:

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