Chemistry Acids and Bases Quiz

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Questions and Answers

What is the function of litmus in identifying solutions?

It neutralizes the solutions.

It increases the pH of basic solutions.

It measures the concentration of the solution.

It indicates whether a solution is acidic or basic. (correct)

What color does blue litmus paper turn when placed in an acidic solution?

Blue

Yellow

Red (correct)

Purple

A solution turns red litmus paper blue. Which of the following is true?

It is a neutral solution.

It is an acidic solution.

It has a pH of 7.

It is a basic solution. (correct)

What does a pH of 7 indicate about a solution?

It is neutral. (B) Signup and view all the answers

Which of the following pH values indicates the highest acidity?

1 (B) Signup and view all the answers

A substance has a pH of 2. Which of the following best describes it?

It is a very acidic substance (B) Signup and view all the answers

According to the provided content, which of the following statements is true, regarding using litmus paper?

Litmus paper is used to measure the concentration of solutions. (A) Signup and view all the answers

What is the pH of pure water?

7 (D) Signup and view all the answers

Which property is characteristic of solutions formed by acids?

Have a sour taste (A) Signup and view all the answers

A solution that can cause serious burns on skin is an indication of what property?

Can be either an acid or a base. (B) Signup and view all the answers

If a solution feels slippery to the touch, what property does it likely possess?

Basic (A) Signup and view all the answers

What type of reaction is associated with solutions of both acids and bases?

A reaction that can corrode (react with) metals. (B) Signup and view all the answers

Which of the following best describes the effect of acids on metals?

They tend to corrode or react with metals. (A) Signup and view all the answers

A solution that is safe enough to drink but still possesses acidic properties would likely be what?

Lemon juice (B) Signup and view all the answers

Which of these would likely react with (breakdown) fats and oils?

Basic solutions (A) Signup and view all the answers

What makes hydrochloric acid different from lemon juice?

Hydrochloric acid is much more potent and dangerous (A) Signup and view all the answers

Which of the following has the lowest pH value?

Lemon juice (A) Signup and view all the answers

A solution with a pH of 11.1 would be considered:

Slightly basic (B) Signup and view all the answers

Which of the following has a pH closest to neutral?

Human blood (A) Signup and view all the answers

Which of these is the correct order of pH, from lowest to highest?

Battery acid, Lemon juice, Normal rain, Milk (C) Signup and view all the answers

According to the figure, which of these is the most basic?

Drain cleaner (D) Signup and view all the answers

If a substance is measured to have a pH between 7 and 14 inclusive, that substance is a:

Basic solution (B) Signup and view all the answers

Based on the figure, what trend is observed in the pH values as we move from lemon juice to milk of magnesia?

The pH values increase. (D) Signup and view all the answers

Which substance on the list is most likely to neutralize an acid?

Milk of Magnesia (C) Signup and view all the answers

Study Notes

Measuring the Acidity of Solutions

Acids are compounds that form solutions with a sour taste, react with (corrode) metals, and can cause burns on skin. Some acids are harmless (e.g., lemon juice), while others are extremely dangerous (e.g., hydrochloric acid).
Bases are compounds that form solutions with a bitter taste, feel slippery, react with (break down) fats and oils, and can cause burns on skin. Some bases are harmless (e.g., baking soda solution), but others should be handled with extreme care (e.g., drain cleaner).

Identifying Acids and Bases

Litmus is a dye used to identify acids and bases. Acidic solutions turn blue litmus paper red, while basic solutions turn red litmus paper blue.

pH Scale

The pH scale measures the acidity or basicity of a solution. Numbers below 7 indicate acidity, with lower values meaning more acidic. Numbers above 7 indicate basicity, with higher values meaning more basic. A pH of 7 is neutral.
Examples of pH values are shown in Figure 4 (e.g., lemon juice has a pH of approximately 2.0, baking soda has a pH of approximately 8.2).

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Description

Test your understanding of the properties and identification of acids and bases, including their effects and the pH scale. This quiz covers key concepts related to the measurement of acidity and basicity in solutions.