AP Chemistry Acid-Base Basics

The _____ scale measures the acidity of substances.

Which of these is a property of acidic solutions?

• they taste sour

• they feel slippery

• they are in many cleaning products

• they taste bitter

An unknown substance was tested and found to have an extremely high concentration of hydroxide ions, OH^-. and very low concentration of hydronium ions, H₃O⁺. Which pH would make the most sense?

• pH = 2

• pH = 6

• pH = 8

• pH = 12

What does pH measure?

• strength of an acid

• strength of a base

• strength of both acids and bases

• concentration of H+ ions

What is the main difference between acids and bases in terms of pH value?

• Acids have a pH value below 7, while bases have a pH value above 7.

• Acids have a pH value above 7, while bases have a pH value below 7.

• Both acids and bases have a pH value of 7.

• Acids and bases do not have pH values.

Which of the following is a base?

• Vinegar

• Lemon Juice

• Baking Soda

• Tomato Juice

Click on the substance that is the strongest base.

Which of the following is NOT a characteristic of acids?

• They turn litmus paper red

• They have a sour taste

• They turn litmus paper blue

• They react with metals to produce hydrogen gas

Tags

DOK Level 1: Recall

As the pH of a solution gets lower, the solution becomes more _____.

• acidic

• basic (or alkaline)

• neutral

• ionic

Which terms refer to how well an acid or base ionizes in a solution?

• strong or weak

• concentrated or dilute

• neutral or charged

• acid or base