Identifying Acids and Bases

Of the following formulas which is a base?

• HBr

• Mg(OH)₂

• KCl

• CaCl₂

Williams collected a rain sample and measured its pH to be 5.6.  What does this mean?

• the rain water is a weak base

• the rain water is neutral

• the rain water is a strong acid

• the rain water is a weak acid

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

• 4

• 5.6

• 8

• 13

James spilled some HCl on the floor. What would be the best way for James to clean the floor?

• Call 911

• Clean it with water

• Neutralize it with a Strong base

• Neutralize it with a Strong Acid

• None of these, because I don't know if HCl is an acid or base

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

If an acid is combined with a base of equal strength, the result will most likely be

• neutral solution.

• stronger acid.

• impossible to tell without testing the pH.

• stronger base

Tags

NGSS.MS-PS1-5

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Which of the following is an acid?

• vinegar

• bleach

• sugar in water

• starch in water

• toothpaste in water

Which of the following is a property of a base?

• bitter taste

• reacts with metals

• salty

• sour taste

Which of the following pH values represents a base?

• 2.1

• 4.6

• 6.8

• 8.1