Question 1

Which of the following is the correct balanced equation for the neutralization of barium hydroxide with sulfuric acid?

Accepted Answer

The correct balanced equation is Ba(OH)₂ + H₂SO₄ → BaSO₄ + 2 H₂O. This equation shows that one molecule of barium hydroxide reacts with one molecule of sulfuric acid to produce one molecule of barium sulfate and two molecules of water.

Question 2

In the balanced chemical reaction for the neutralization of calcium hydroxide with sulfuric acid,H₂SO₄,the coefficient of water is

Accepted Answer

The balanced chemical equation is Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O, so the coefficient of water is 2.

Question 3

Hydrocyanic acid is classified as a weak acid in water.This means that it produces

Accepted Answer

A weak acid only partially ionizes in water, producing a relatively small fraction of the maximum number of possible hydronium ions. Therefore, option B is the correct answer. Options A, C, and D are incorrect because hydrocyanic acid does produce some hydronium ions, but not at the maximum possible concentration.

Question 4

The same number of moles of acetic acid and hydrogen chloride are placed in beakers containing water.After this addition,the beaker with the HCl has more hydronium ions than the beaker with added acetic acid.HCl is classified as

Accepted Answer

The beaker with hydrogen chloride has more hydronium ions because HCl is a stronger acid than acetic acid. The stronger the acid, the more it donates protons or H+ ions in water, leading to the formation of more hydronium ions. Therefore, option B is the best choice.

Question 5

In the balanced chemical reaction for the neutralization of sodium hydroxide with sulfuric acid,H₂SO₄,the coefficient of water is

Accepted Answer

The balanced chemical equation for the neutralization of sodium hydroxide (NaOH) with sulfuric acid (H₂SO₄) is: 2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O. The coefficient of water (H₂O) is 2.

Question 6

When a metal oxide is added to water,it will form a(n)

Accepted Answer

When a metal oxide is added to water, it will form a basic compound or a base. This is because metal oxides are the oxides of basic metals, and they react with water to form metal hydroxides, which are basic compounds. For example, when sodium oxide (Na2O) is added to water, it forms sodium hydroxide (NaOH), which is a strong base. Therefore, the correct answer is B) base.

Question 7

A nonmetal oxide is called a(n)

Accepted Answer

A nonmetal oxide reacts with water to form an acidic solution, making it an acidic anhydride. Basic anhydrides are metal oxides, neutral compounds do not exist as nonmetal oxides react with water, and salts require a reaction with an acid or a base.

Question 8

Hydroiodic acid is classified as a strong acid in water.This means that it produces

Accepted Answer

Hydroiodic acid is a strong acid, which means it completely dissociates in water, producing 100% of the maximum number of possible hydronium ions.

Question 9

All of the following are strong acids EXCEPT

Accepted Answer

Hydrocyanic acid is a weak acid, while the other three options (hydrochloric acid, perchloric acid, and hydroiodic acid) are all strong acids.

Question 10

Lithium hydroxide is classified as a strong base in water.This means that it produces

Accepted Answer

Lithium hydroxide is a strong base, which means it dissociates completely in water to produce 100% of the maximum number of possible hydroxide ions.

Question 11

A ruptured tank in Anywhere,USA spilled hydrochloric acid.Officials were reported to be "concerned that the acid might mix with sodium hydroxide - caustic soda - in a neighboring tank and form a toxic gas." What toxic gas would be formed?

Accepted Answer

The answer of A ruptured tank in Anywhere,USA spilled hydrochloric...

Question 12

A weak base

Accepted Answer

A weak base is a base that ionizes only slightly in solution, meaning it does not fully dissociate into ions. This is in contrast to a strong base, which ionizes completely in solution. Therefore, choices A and B are incorrect because they refer to the concentration of the base, which is not necessarily a defining characteristic of a weak base.

Question 13

Which of the following is the correct balanced equation for the neutralization of barium hydroxide with hydrochloric acid?

Accepted Answer

The balanced equation for the neutralization of barium hydroxide with hydrochloric acid is:
Ba(OH)₂ + 2 HCl → BaCl₂ + 2 H₂O
This equation shows that one mole of barium hydroxide (Ba(OH)₂) reacts with two moles of hydrochloric acid (HCl) to produce one mole of barium chloride (BaCl₂) and two moles of water (H₂O). Option A is the only choice that correctly balances the equation. Option B has an incorrect formula for barium hydroxide (should be Ba(OH)₂). Option C has the correct formula for barium hydroxide but is not balanced. Option D has incorrect formulas for both barium hydroxide and barium chloride.

Question 14

Which is a weak base in aqueous solution?

Accepted Answer

NH₃ (ammonia) is a weak base because it partially ionizes in water, unlike strong bases like NaOH and Ca(OH)₂ which fully dissociate. HF is a weak acid, not a base.

Question 15

In the balanced chemical reaction for the neutralization of calcium hydroxide with nitric acid,HNO₃,the coefficient of nitric acid is

Accepted Answer

The balanced chemical equation is Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O, so the coefficient of HNO₃ is 2.

Question 16

Give an example of an amphiprotic compound.

Accepted Answer

Amphiprotic compounds are those which can act as both a proton donor and acceptor. Water is an example of an amphiprotic compound as it can donate a proton to form an OH- ion (as in basic solutions) or accept a proton to form H3O+ (as in acidic solutions).

Question 17

When an aqueous solution containing hydrochloric acid is just neutralized with an aqueous solution containing sodium hydroxide,the solution would taste

Accepted Answer

When hydrochloric acid is neutralized with sodium hydroxide, the resulting product is sodium chloride and water. Sodium chloride is a salt, which has a salty taste. Therefore, the solution would taste salty.

Question 18

Citric acid is produced by oranges.When citric acid dissolves in water,it produces a relatively small number of hydronium ions.Citric acid is best described as a

Accepted Answer

Citric acid produces a relatively small number of hydronium ions when it dissolves in water, indicating that it is a weak acid.

Question 19

Ammonia is classified as a weak base in water.This means that it produces

Accepted Answer

A weak base partially ionizes in water, producing a relatively small fraction of the maximum number of possible hydroxide ions. Therefore, ammonia produces a relatively low concentration of hydroxide ions in water.

Question 20

An acid is strong if it

Accepted Answer

An acid is considered strong if it ionizes completely in water, meaning that all of its molecules dissociate into hydrogen ions (H+) and anions. This results in a high concentration of H+ ions in solution, which makes the acid highly reactive and able to easily donate protons to other substances. Strong acids are also able to rapidly change the color of acid-base indicators due to the high concentration of H+ ions present. Corrosion of metals is not a reliable indicator of acid strength, as some weaker acids can still cause corrosion depending on the specific metal and conditions. Concentration alone also does not determine acid strength, as a concentrated weak acid will not behave the same way as a dilute strong acid.

Quiz 7: Acids and Bases