Classifying Acids and Bases

Tammy wanted to test the pH of a liquid solution. She added three drops of Phenol Red to solution, after a few moments she noticed a bright yellowish cooler. What is most likely the pH of the solution?

• 6.8 or below

• 8.2 and above

• Neutral

• None of these because I do not have enough information.

All acids form ions when dissolved in water. Which ion makes the solution acidic?

• H⁺

• OH^-

• A^-

• B⁺

James spilled some HCl on the floor. What would be the best way for James to clean the floor?

• Call 911

• Clean it with water

• Neutralize it with a Strong base

• Neutralize it with a Strong Acid

• None of these, because I don't know if HCl is an acid or base

Of the following formulas which is a base?

• HBr

• Mg(OH)₂

• KCl

• CaCl₂

The pH of vinegar is 2.5.  Vinegar is a _____________.

• strong acid

• strong base

• weak base

• weak acid

Williams collected a rain sample and measured its pH to be 5.6.  What does this mean?

• the rain water is a weak base

• the rain water is neutral

• the rain water is a strong acid

• the rain water is a weak acid

Which of these pH values would indicate that a solution is a weak base?

• 4

• 5.6

• 8

• 13

Which of the following is an acid?

• shampoo

• baking soda

• orange juice

• water

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct