Q: Which of the following statements best describes a Brønsted-Lowry acid?

It is a substance that donates an H\textsuperscript{+} ion in water.

Q: Given the equilibrium: \newline $$\mathrm{N}_2(g) + 3\mathrm{H}_2(g) \rightleftharpoons 2\mathrm{NH}_3(g)$$ \newline What will happen if more NH\textsubscript{3} is added to the system?

The equilibrium will shift to the left, producing more N\textsubscript{2} and H\textsubscript{2}.

Question 1

Which of the following statements best describes a Brønsted-Lowry acid?

Accepted Answer

It is a substance that donates an H	extsuperscript{+} ion in water.

Question 2

Which of the following is a strong acid?

Accepted Answer

HCl

Question 3

Which compound is a strong base?

Accepted Answer

NaOH

Question 4

Consider the reaction: 
ewline $$\mathrm{HCl}(aq) + \mathrm{CaCO}_3(s) ightarrow \mathrm{CaCl}_2(aq) + \mathrm{CO}_2(g) + \mathrm{H}_2O(l)$$ 
ewline Which type of reaction is this?

Accepted Answer

Acid-carbonate reaction

Question 5

Which of the following will increase the rate of a chemical reaction according to collision theory?

Accepted Answer

Increasing reactant concentration

Question 6

Given the equilibrium: 
ewline $$\mathrm{N}_2(g) + 3\mathrm{H}_2(g) ightleftharpoons 2\mathrm{NH}_3(g)$$ 
ewline What will happen if more NH	extsubscript{3} is added to the system?

Accepted Answer

The equilibrium will shift to the left, producing more N	extsubscript{2} and H	extsubscript{2}.

Question 7

Which equation correctly expresses the equilibrium constant $$K_c$$ for the reaction: 
ewline $$\mathrm{2SO}_2(g) + \mathrm{O}_2(g) ightleftharpoons \mathrm{2SO}_3(g)$$?

Accepted Answer

$$K_c = \dfrac{[SO_3$]^2}{[SO_2$]^2[O_2$]}$$

Question 8

A solution has $$[H^+] = 1 	imes 10$$^{-5}$$ M. What is the pH of the solution?

Accepted Answer

pH = 5

Question 9

Which of the following amino acids is classified as basic?

Accepted Answer

Lysine

Question 10

Which type of bond is formed during the condensation reaction that links amino acids together?

Accepted Answer

Peptide bond

Question 11

Which structural level of proteins is primarily stabilized by hydrogen bonds between backbone atoms?

Accepted Answer

Secondary structure

Question 12

Which of the following changes will increase the solubility of a gas in a liquid?

Accepted Answer

Increasing the pressure

Question 13

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes lower the activation energy and increase reaction rate.

Question 14

Which of the following is true about the tertiary structure of proteins?

Accepted Answer

It involves interactions between R groups of amino acids.

Question 15

A buffer solution is made by mixing acetic acid and sodium acetate. What happens when a small amount of HCl is added?

Accepted Answer

The pH changes only slightly.

Question 16

Which of the following is a correct formula for calculating pOH?

Accepted Answer

$$\mathrm{pOH} = -\log[OH^-]$$

Question 17

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storing genetic information

Question 18

Which intermolecular force is most important in stabilizing the alpha-helix structure of proteins?

Accepted Answer

Hydrogen bonds

Question 19

Which of the following statements about essential amino acids is correct?

Accepted Answer

They must be obtained from the diet.

Question 20

A patient is experiencing metabolic acidosis. Which of the following could be a possible cause?

Accepted Answer

Uncontrolled diabetes mellitus

Acids, Bases, and Proteins: Study Guide for GOB Chemistry

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