Acids and Bases #1

Which of the following is a property of acids?

• Bitter taste

• Slippery feel

• Sour taste

• Soapy texture

What is the pH of pure water?

• 1

• 4

• 7

• 1

Which of the following substances would likely turn red litmus paper blue?

• Lemon juice

• Vinegar

• Soap

• Cola

Peter compares two unknown solutions, Solution R and Solution S. He rubs a drop of each solution between his fingers (after confirming with the teacher that it is safe to do so) and records the observations. Solution | Texture Observation Solution R | Feels slippery Solution S | Feels normal Based on the observations, which statement best describes the properties of Solution R and Solution S?

• Solution R is an acid, and Solution S is a base.

• Solution R is a base, and Solution S is an acid.

• Both Solution R and Solution S are bases.

• Both Solution R and Solution S are acids.

A student wants to compare the acidity of two fruit juices, orange juice and apple juice. The student measures the pH of both juices using a pH meter and observes the following results: - The pH meter reads 3.5 when measuring the pH of orange juice. - The pH meter reads 4.0 when measuring the pH of apple juice. Based on the pH measurements, which statement best compares the acidity of the two juices?

• Orange juice is more acidic than apple juice.

• Apple juice is more acidic than orange juice.

• Both juices have the same acidity.

In a laboratory, which of the following might indicate that a solution is a strong acid? (Select all that apply).

• The solution has a pH of 1.

• The solution turns blue litmus paper red.

• The solution turns red litmus paper blue.

• The solution has a pH of 6.5.

• The solution is very corrosive to metals.

You are given a solution that is neither turning litmus paper red nor blue. What does this indicate about the solution's pH, and how could you further test it?

When comparing acids and bases, which of the following properties is unique to bases?

• They taste sour.

• They feel slippery to the touch.

• They turn blue litmus paper red.

• They have a pH less than 7.

John is testing the pH of various household substances. He finds that lemon juice has a pH of 2, distilled water has a pH of 7, and bleach has a pH of 12. Which of the following statements is true?

• Lemon juice is a base, and bleach is an acid.

• Distilled water is an acid, and lemon juice is a base.

• Bleach is a base, and lemon juice is an acid.

• Distilled water is a base, and bleach is an acid.

Sarah is experimenting to determine the pH of rainwater in her area. She collected rainwater samples for a week and found that the average pH was 5.8. What can Sarah conclude about the rainwater in her area?

• The rainwater is neutral.

• The rainwater is slightly acidic.

• The rainwater is slightly basic.

• The rainwater is strongly acidic.