What is produced when an acid reacts with a metal oxide?

A. Salt and water

B. Carbon dioxide and water

C. Oxygen gas and water

D. Hydrogen gas and water

Answer Explanation:

A) Salt and water (Correct Answer): When an acid reacts with a metal oxide, a salt and water are typically produced. The metal in the metal oxide combines with the acid to form a salt, and water is produced as a byproduct of the reaction.

B) Carbon dioxide and water: This reaction occurs when an acid reacts with a metal carbonate, not a metal oxide. When carbonates react with acids, carbon dioxide gas is produced along with water and a salt.

C) Oxygen gas and water: This reaction is not typical when an acid reacts with a metal oxide. Metal oxides generally do not produce oxygen gas when reacting with acids.

D) Hydrogen gas and water: This reaction occurs when an acid reacts with a metal, not a metal oxide. When metals react with acids, hydrogen gas is typically produced along with water and a salt.

Therefore, the Correct Answer is A.

Q #1: Strong bases are:

A. Strong electrolytes

B. Weak electrolytes

C. Nonelectrolytes

D. Also strong acids

Answer Explanation

a. Strong electrolytes (Correct Answer): Strong bases completely dissociate into ions in solution, making them strong electrolytes. They conduct electricity well due to the presence of a high concentration of ions.

b. Weak electrolytes: Strong bases, unlike weak bases, completely dissociate in solution, resulting in a high concentration of ions. Therefore, they are considered strong electrolytes, not weak electrolytes.

c. Nonelectrolytes: Nonelectrolytes do not ionize in solution and do not conduct electricity. Strong bases, however, ionize completely in solution, making them strong electrolytes.

d. Also strong acids: Strong bases and strong acids are two distinct types of compounds. Strong bases ionize completely in solution to produce hydroxide ions, while strong acids ionize completely to produce hydrogen ions (H+). They are not the same.
Q #2: What ions make ammonia solution alkaline?

A. Cl- ions

B. H+ ions

C. Na+ ions

D. OH- ions

Answer Explanation

A) Cl- ions: Chloride ions (Cl-) are typically found in salts and do not contribute directly to the alkalinity of ammonia solution.

B) H+ ions: Hydrogen ions (H+) typically characterize acidic solutions, not alkaline solutions. Ammonia solution doesn't contain H+ ions.

C) Na+ ions: Sodium ions (Na+) are typically found in salts and do not contribute directly to the alkalinity of ammonia solution.

D) OH- ions (Correct Answer): Ammonia solution becomes alkaline due to the presence of hydroxide ions (OH-). Ammonia (NH3) reacts with water to form ammonium ions (NH4+) and hydroxide ions (OH-), increasing the concentration of OH- ions and making the solution alkaline.
Q #3: Suggest a pH value for ammonia solution.

A. 7-8

B. 9-10

C. 10-13

D. 13-14

Answer Explanation

A) 7-8: This pH range suggests a neutral to slightly basic solution. Ammonia solution is typically more alkaline than this range.

B) 9-10: This pH range suggests a slightly basic solution. Ammonia solution is generally more alkaline than this range.

C) 10-13 (Correct Answer): Ammonia solution is typically alkaline and falls within the pH range of 10-13. Ammonia reacts with water to produce hydroxide ions (OH-), resulting in an alkaline solution.

D) 13-14: This pH range suggests a highly basic solution, which may be too high for typical ammonia solutions. Ammonia solutions are usually within the pH range of 10-13.

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What is produced when an acid reacts with a metal oxide?

More Questions on TEAS 7 Science

Q #1: Strong bases are:

Answer Explanation

Q #2: What ions make ammonia solution alkaline?

Answer Explanation

Q #3: Suggest a pH value for ammonia solution.

Answer Explanation

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