Acids , Bases and pH Quiz

Which statement about bases is incorrect?

• Bases turn red litmus paper blue.

• Bases contain hydrogen ions.

• Bases taste bitter.

• Bases have a pH of 7.1-14.0.

Which of the following is a property of an acid?

• form hydroxide ions

• have a negative charge

• turn litmus paper blue

• have a pH of 0-6.9

The label on a bottle indicates that the substance inside has a pH of 13. Which of the following statements is an accurate description of the substance?

• It has a large concentration of hydrogen ions.

• It has a large concentration of hydroxide ions.

• It has a small concentration of hydroxide ions.

• It has no ions at all.

Litmus paper is made from water-soluble dyes which are extracted from lichens. This paper is used as an acid-base indicator. Which of these common household substances would turn blue litmus paper red?

• bleach

• lye

• ammonia

• vinegar

Which substance will cause litmus paper to turn red?

• Substance A

• Substance B

• Substance C

• Substance D

Which of the following is NOT a product of a neutralization reaction?

• gas

• water

• ammonia

• salt

Which statement is true of an aqueous solution of KOH?

• It’s a base.

• It’s an acid.

• It’s neutral.

Milk of magnesia is a common ingredient in many heartburn and stomach medications. How does milk of magnesia act to calm an upset stomach?

• Milk of magnesia is an acid that neutralizes stomach acid.

• Milk of magnesia is a base that neutralizes stomach acid.

• Milk of magnesia has a neutral nature which dilutes stomach acid.

• Milk of magnesia is a base that neutralizes bases in the stomach.

Linda tests an unknown solution in science class. She observes that the solution does not change the color of red or blue litmus paper. She further observes that the pH of the solution is 7.0. Which of the following statements best describes the unknown solution?

• It’s a base.

• It’s an acid.

• It’s neutral.

• It’s contaminated.

What can be said of the solution below?

• It’s an acid.

• It’s a base.

• It’s neutral.

• There is not enough information to tell.

Tags

NGSS.MS-PS1-2