Acids/ Bases pH: Notes & Review Questions

Multiple Choice

Which of the following statements about acids and bases is correct?

• Acids have a pH above 7 and bases have a pH below 7.

• Acids generally start with H in their chemical formula, while bases generally have OH on the right side of their formula.

• All acids and bases are poisonous and corrosive.

• The pH scale is not used to measure how acidic or basic a solution is.

Open Ended

Why is it important to understand acids, bases, and the pH scale in everyday life?

Multiple Choice

Which of the following is a property of acids?

• They have a bitter taste

• They are slippery to touch

• They have a sour taste

• They do not conduct electricity

Multiple Select

Which of the following substances are examples of strong acids?

• Citric acid

• Hydrochloric acid

• Acetic acid

• Sulphuric acid

Multiple Choice

What happens when the oxide of some non-metals dissolves in water?

• It forms a base

• It forms an acid

• It forms a salt

• It forms a neutral solution

Multiple Choice

Which of the following statements about acids is correct?

• Acids do not dissolve in water

• Acids are made of ions and can conduct electricity in water

• Acids are always weak

• Acids taste sweet

Open Ended

Explain how acids can be classified as strong or weak based on their ionization in water.

Multiple Choice

What is the exception to the general rule for writing the chemical formula of acids containing carbon?

• The hydrogen is written first

• The carbon is written first

• The hydrogen may be written on the right side

• The oxygen is written on the left side

Multiple Choice

Which acid is commonly found in automobile batteries?

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

• Ethanoic acid

Multiple Choice

Which of the following acids are present in vinegar and in your stomach?

• Hydrochloric acid and ethanoic acid

• Sulfuric acid and nitric acid

• Hydrochloric acid and sulfuric acid

• Nitric acid and ethanoic acid

Open Ended

How can you recognize an acid by its chemical formula?

Multiple Choice

Which of the following is a product when magnesium reacts with hydrochloric acid?

• Magnesium oxide

• Magnesium chloride

• Copper sulphate

• Water

Multiple Select

Which of the following statements about bases is/are correct?

• Bases usually have a bitter taste.

• All bases dissolve in water.

• Bases are always safe to touch.

• Bases conduct electricity.

Open Ended

Explain how bases are able to conduct electricity. Use the properties of bases to support your answer.

Open Ended

Name two strong bases commonly found in household cleaning products and one weak base.

Open Ended

How can you recognize a base by its formula?

Multiple Choice

Which type of ions do acids produce when dissolved in solution?

• Hydrogen ions (H+)

• Hydroxide ions (OH-)

• Sodium ions (Na+)

• Chloride ions (Cl-)

Multiple Select

Which of the following substances are considered neutral based on their pH values?

• Milk

• Pure water

• Blood

• Vinegar

Open Ended

Explain how the pH scale is used to determine whether a substance is acidic, neutral, or basic. Use examples from common substances.

Open Ended

What is the increase in acidity if the pH drops from pH 6 to pH 4?

Multiple Choice

Which of the following statements best describes the difference between acids and bases?

• Acids have a pH below 7 and usually start with H in their formula, while bases have a pH above 7 and usually have OH in their formula.

• Acids have a pH above 7 and usually have OH in their formula, while bases have a pH below 7 and usually start with H in their formula.

• Acids and bases both have a pH of 7 and do not contain H or OH in their formulas.

• Acids and bases cannot be identified by their pH values or chemical formulas.

Open Ended

Summarize what you have learned about acids, bases, and the pH scale. Why is it important to know whether a substance is acidic, basic, or neutral?