Acids, Bases And Preparation Of Salts
Through out our experiments in the past classes we have discovered that once you mix an acid with a base what you normally get is a salt. Test out your understanding of this topic by taking this review questions and tackle them with your fellow classmates. There will be a test to see if you took up this challenge.
- 1.
Which of the following methods cannot be used to prepare a sample of zinc sulfate?
- A.
Adding zinc to sulfuric acid
- B.
Adding zinc carbonate to sulfuric acid
- C.
Adding zinc oxide to sulfuric acid
- D.
Adding aqueous zinc nitrate to aqueous sodium sulfate
Correct Answer
D. Adding aqueous zinc nitrate to aqueous sodium sulfateExplanation
Adding aqueous zinc nitrate to aqueous sodium sulfate cannot be used to prepare a sample of zinc sulfate because this reaction would result in the formation of zinc nitrate and sodium sulfate, not zinc sulfate.Rate this question:
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- 2.
A student adds Universal Indicator to 2 test tubes containing unknown solutions. If the solution in test tube 1 turns purple and the solution in test tube 2 turns green. what are the two solutions likely to be?
- A.
Sulfuric acid / sodium hydroxide
- B.
Sodium hydroxide / nitric acid
- C.
Sodium chloride / water
- D.
Potassium hydroxide / sodium chloride
Correct Answer
D. Potassium hydroxide / sodium chlorideExplanation
The Universal Indicator changes color based on the pH of a solution. Purple indicates a high pH, while green indicates a neutral pH. Therefore, the solution in test tube 1 is likely to be potassium hydroxide, which is a strong base, while the solution in test tube 2 is likely to be sodium chloride, which is a neutral salt.Rate this question:
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- 3.
Dilute sulfuric acid reacts with magnesium oxide and magnesium carbonate. How are these two reactions alike?
- A.
Water is produced.
- B.
Carbon dioxide is produced.
- C.
A solid is produced.
- D.
There are two products in the reaction.
Correct Answer
A. Water is produced.Explanation
Both reactions involving dilute sulfuric acid and magnesium oxide/magnesium carbonate produce water as a product.Rate this question:
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- 4.
Which of the following is a basic oxide?
- A.
Carbon monoxide
- B.
Sodium oxide
- C.
Zinc Oxide
- D.
Sulfur dioxide
Correct Answer
B. Sodium oxideExplanation
Sodium oxide is a basic oxide because it reacts with water to form a strong base, sodium hydroxide. Basic oxides are typically metal oxides that react with water to form a base, while acidic oxides react with water to form an acid. Carbon monoxide, zinc oxide, and sulfur dioxide are not basic oxides.Rate this question:
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- 5.
Which of the following does produces hydrogen ions in aqueous solutions?
- A.
Hydrogen Chloride
- B.
Magnesium chloride
- C.
Ethanol
- D.
Potassium Hydroxide
Correct Answer
A. Hydrogen ChlorideExplanation
Hydrogen chloride (HCl) is a strong acid that dissociates in water to produce hydrogen ions (H+) and chloride ions (Cl-). In aqueous solutions, HCl donates a proton to water to form hydronium ions (H3O+), which are equivalent to hydrogen ions. Therefore, hydrogen chloride is the compound that produces hydrogen ions in aqueous solutions.Rate this question:
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- 6.
Which of the following is not a property of an aqueous solution of calcium hydroxide?
- A.
It turns red litmus to blue.
- B.
It produces hydroxide ions.
- C.
It reacts with magnesium to produce hydrogen.
- D.
It liberates ammonia from ammonium chloride
Correct Answer
C. It reacts with magnesium to produce hydrogen.Explanation
An aqueous solution of calcium hydroxide does not react with magnesium to produce hydrogen. This is because calcium hydroxide is a strong base, while magnesium is a less reactive metal. In general, less reactive metals do not readily react with strong bases to produce hydrogen gas. Therefore, this property is not observed in an aqueous solution of calcium hydroxide.Rate this question:
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- 7.
Which of the following is the least soluble in water?
- A.
Ammonium sulfate
- B.
Barium sulfate
- C.
Copper (II) sulfate
- D.
Magnesium sulfate
Correct Answer
B. Barium sulfateExplanation
Barium sulfate is the least soluble in water compared to the other compounds listed. This is because barium sulfate has a low solubility product constant (Ksp), indicating that it does not readily dissociate into its ions in water. As a result, it remains mostly undissolved as a solid in water, making it the least soluble compound among the options given.Rate this question:
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- 8.
Which salt is best prepared by a titration method?
- A.
Copper (II) sulfate
- B.
Lead (II) sulfate
- C.
Sodium nitrate
- D.
Zinc nitrate
Correct Answer
C. Sodium nitrateExplanation
Sodium nitrate is best prepared by a titration method because it is a strong oxidizing agent and can react with other substances in a controlled manner. Titration allows for precise measurement of the amount of sodium nitrate needed to react with a specific substance, ensuring accurate and consistent results. Additionally, sodium nitrate is commonly used in titration experiments due to its stability and solubility in water, making it an ideal choice for this method.Rate this question:
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- 9.
Which of the following salts cannot be prepared by a reaction between a dilute acid and a metal?
- A.
Calcium chloride
- B.
Iron (II) chloride
- C.
Zinc sulfate
- D.
Copper (II) chloride
Correct Answer
D. Copper (II) chlorideExplanation
Copper (II) chloride cannot be prepared by a reaction between a dilute acid and a metal because copper is less reactive than hydrogen. In a reaction between a dilute acid and a metal, hydrogen gas is produced and the metal reacts with the acid to form a salt. However, copper is less reactive than hydrogen, so it does not displace hydrogen from the acid and therefore cannot form copper (II) chloride through this reaction.Rate this question:
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- 10.
Which of the following compounds is a soluble base?
- A.
Aluminium oxide
- B.
Copper (II) oxide
- C.
Copper (II) sulfate
- D.
Sodium oxide
Correct Answer
D. Sodium oxideExplanation
Sodium oxide is a soluble base because it dissolves in water to form sodium hydroxide, which is a strong base.Rate this question:
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