Question 1

Which statement best describes a Bronsted-Lowry acid?

Accepted Answer

A substance that donates a proton ($$H^+) in a $$chemical reaction.

Question 2

Which of the following is a characteristic property of bases?

Accepted Answer

They feel slippery and turn phenolphthalein pink.

Question 3

What is the conjugate base of $$HCO_3$$^-$$?

Accepted Answer

$$CO_3$$^{2-}$$

Question 4

In the reaction $$NH_3 + H_2O$$ \rightarrow $$NH_4^+ + OH$$^-$$, which species acts as the Bronsted-Lowry base?

Accepted Answer

$$NH_3$$

Question 5

Which of the following statements about acids and bases is TRUE?

Accepted Answer

Acids are electrolytes because they produce $$H^+$$ ions in water.

Question 6

A solution turns blue litmus paper red and has a sour taste. Which of the following is most likely present?

Accepted Answer

An acid

Question 7

Which of the following is the correct definition of a conjugate acid-base pair?

Accepted Answer

Two species that differ by one proton ($$H^+).$$

Question 8

If $$HNO_3$$ donates a proton to $$NH_3 in a $$reaction, what are the conjugate acid-base pairs?

Accepted Answer

$$HNO_3$$ and $$NO_3$$^-$$; NH_3$ and NH_4$^+$$

Question 9

Which of the following is NOT a property of acids?

Accepted Answer

They turn litmus paper blue.

Question 10

A student mixes $$NaOH$$ with water. What ions are produced in the solution?

Accepted Answer

$$Na^+$$ and OH^-$

Question 11

Which of the following best explains why acids and bases are electrolytes?

Accepted Answer

They produce ions in water that allow electrical current to flow.

Question 12

In the reaction $$HCl + H_2O \rightarrow Cl^- + H_3O^+$$, what is the conjugate base?

Accepted Answer

$$Cl^-$$

Question 13

Which of the following is the correct formula for Avogadro's number?

Accepted Answer

$$6.022 	imes 10$$^{23}$$

Question 14

A solution contains $$NH_4$$^+$$ and OH$$^-$$. Which of the following reactions could have produced this solution?

Accepted Answer

$$NH_3 + H_2O$$ \rightarrow $$NH_4^+ + OH$$^-$$

Question 15

Which of the following is a real-world example of an acid?

Accepted Answer

Citric acid in lemons

Question 16

Which of the following pairs are NOT conjugate acid-base pairs?

Accepted Answer

$$Na^+$$ and $$Na$$

Question 17

Which of the following best describes the role of water in the reaction $$HCl + H_2O \rightarrow Cl^- + H_3O^+$$?

Accepted Answer

Water acts as a Bronsted-Lowry base.

Question 18

Which of the following is the correct relationship between protons, neutrons, and atomic mass?

Accepted Answer

Atomic mass equals the number of protons plus neutrons.

Question 19

A patient accidentally ingests a strong base. Which of the following symptoms is most likely to occur?

Accepted Answer

A soapy, slippery feeling in the mouth.

Acids and Bases: Foundations for GOB Chemistry (CHE 1120)

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