ACID & BASE

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to 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

Which of these is a property of acidic solutions?

• they taste sour

• they feel slippery

• they are in many cleaning products

• they taste bitter

Acids are substances that release positively charges _________ ions in water

Bases turn red litmus paper _________.

The _______ scale measures the strength of acids and bases.

Black coffee has a pH of 5. It is a ________ ____________

• Weak

• Strong

• Acid

• Base

pH 3

• Weak

• Strong

• Acid

• Base

pH 14

• Weak

• Strong

• Acid

• Base

pH 9

• Weak

• Strong

• Acid

• Base

A sugar solution does not change the color of both blue and red litmus paper. This means the sugar solution is a ________.

• acid

• base

• neutral