Identifying Acids and Bases

Many cleaning solutions are bases. Which of the following is a property of most bases?

• feels slippery

• white color

• can only be liquid

• tastes sour

Which of the following is an acid?

• shampoo

• baking soda

• orange juice

• water

Of the following which is NOT a pH indicator?

• Phenol Red

• Cabbage Juice

• Phenolphtalein

• Phenol Purple

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3

• 9

• 7

• 5

Pure water has a pH of 7. Pure water _______.

• is a base

• is a neutral substance

• could be either an acid or a base

• is an acid

Which of the following is a basic solution?

• Household ammonia

• HCl dissolved in water

• Vinegar

• Pure water

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.

• Red litmus paper turns blue when placed in a base.

• Blue litmus paper stays blue when placed in an acid.

• Red litmus paper stays red when placed in a base.

Which of the following chemical formulas can be identified as an Acid?

• NHCL

• HNO₃

• NaOH

• Na₂SO₄

An acid has a pH...

• from 0 to 6

• from 8 to 14

• from 5 to 10

• between 6 & 7

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.