Acid / Base Chemistry

A sugar solution has a pH of 7. This means the sugar solution is:

• acidic

• basic

• neutral

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

Four substances were tested for pH: lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Rank these 4 substances from most basic to most acidic?

• lemon juice, milk, baking soda, bleach

• bleach, baking soda, milk, lemon juice

• milk, lemon juice, baking soda, bleach

• baking soda, bleach, lemon juice, milk

A wasp sting injects an alkaline substance into your skin. What could you use to neutralize it?

• baking soda (pH = 8)

• vinegar (pH = 2.5)

• water (pH = 7)

Tags

NGSS.MS-PS1-2

Is HNO₃ an acid or base?

• Acid
• Base

KOH will release which ion?

• OH-
• H+
• OH+
• H-

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Tags

NGSS.HS-LS1-3

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

Equal amounts of an acid and a base are mixed in a beaker. When neutralization is complete, what is in the beaker besides salt?

• acid only

• base only

• water

Tags

NGSS.MS-PS1-5