The pH scale

What does the pH scale measure?

• The temperature of a solution

• The concentration of hydrogen ions in a solution

• The amount of dissolved oxygen in a solution

• • The salinity of a solution

What is the pH of a neutral solution?

• 0

• 7

• 14

• 5

A pH value of 4 is considered acidic.

• False

• True

Which of the following substances is basic?

• Lemon juice

• Vinegar

• Baking soda solution

• Orange juice

The pH scale is logarithmic, meaning each whole number change represents a tenfold change in hydrogen ion concentration.

• False

• True

Which tool provides precise pH measurements electronically?

• Universal pH paper

• Litmus paper

• pH meter

• Test strips

Adding an acid to a solution will increase its pH value.

• True

• False

What happens to the pH of a solution if you add a base to it?

• The pH decreases

• The pH remains the same

• The pH increases

• The pH becomes neutral

pH paper can be used to determine whether a solution is acidic or basic, but it does not provide an exact pH value.

• True

• False

What is the pH range for basic (alkaline) solutions?

• 0 to 6

• 7

• 8 to 14

• 4 to 7