pH

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

The table shows the pH of several solutions. Which solution is the most acidic?

• vinegar

• milk

• water

• bleach

Zn(OH)₂ is an example of a...

• acid

• base

• salt

• water

H₃PO₄ is an example of a ...

• acid

• base

• salt

• non-electrolyte

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

If a solution has a pH of 1.5, then litmus would turn

• red

• purple

• blue

• yellow

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

• acidic

• basic

• neutral

Which of these is a property of acidic solutions?

• they taste sour

• they feel slippery

• they are in many cleaning products

• they taste bitter

What is the formula of chlorous acid?

• HClO₃

• HClO₂

• HClO

• HCl

What is the formula for phosphorous acid?

• H₃PO₄
• H₂PO₄
• H₃P
• H₃PO₃