Acid and Base Using pH Scale

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

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

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

Which is the stronger acid?

• pH 1
• pH 4
• pH 8
• pH 13

Which has a pH above 7?

• Acid
• Base

Which has a pH below 7?

• Acid
• Base

What methods can you use to measure the pH of a solution?

• Observing color or clarity
• Measuring mass or volume
• Measuring density or electrical conductivity
• Using acid base-indicators or pH meters

Which of the following is most likely to be basic:

• Lemon juice
• Vinegar
• Laundry detergent
• Coke

Which of these pH values would indicate that a solution is a weak base?

• 4
• 5.6
• 8
• 13

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions