Measures of Concentration: Molality and Other Calculations

Question 1

Consider this reaction: Which is the acid in this reaction?

Revolt · Accepted Answer

B: HBr

Question 2

Consider this reaction: Which is the base in this reaction?

Revolt · Accepted Answer

A: KOH

Question 3

Consider this reaction: Which statement is most likely true about KOH?

Revolt · Accepted Answer

B: It turns clear phenolphthalein pink.

Question 4

Question 4

Revolt · Accepted Answer

A

Question 5

A pool owner adds a compound containing chlorine to the pool to disinfect it. However, too much of the compound is added. As a result, the water becomes too acidic. What could the pool owner do to reduce the acidity of the pool?

Revolt · Accepted Answer

C: He could add a base to the pool to neutralize the acid.

Question 6

Question 6

Revolt · Accepted Answer

C

Question 7

A beaker contains a solution of calcium hydroxide (Ca(OH)2) in water. A student places a straw in the beaker and then breathes into the solution through the straw. As the student breathes into the solution, a white precipitate forms. What is the most likely composition of the precipitate?

Revolt · Accepted Answer

B: CaCO3

Question 8

Question 8

Revolt · Accepted Answer

A

Question 9

Identify two acids and two bases that you use or come into contact with in an average week. Identify uses for each substance.

Revolt · Accepted Answer

Two acids I encounter in an average week are vinegar (acetic acid), which is used for flavoring and preserving food, and citric acid found in lemon juice or soda, used for flavoring. Two bases I encounter are ammonia and bleach, which are used as household cleaning products for disinfecting and stain removal. I also encounter antacids like milk of magnesia to neutralize stomach acid.

Question 10

Which examples did your answer include?

Revolt · Accepted Answer

A: Examples of common acids include vinegar, lemon juice, and soda.; B: Examples of common bases include ammonia, bleach, and antacids.; C: Common uses of acids include flavoring and preserving foods, and they are found in cleaning products.; D: Common uses of bases include neutralizing acids, and they are found in cleaning products.

Measures of Concentration: Molality and Other Calculations Answers

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