$$[H^+] = 1.0 \times 10$$^{-4}$$ M

$$[H^+] = 4.68 \times 10$$^{-3}$$ M

$$0.030 \times 0.03068 = 0.0009204$$ mol

Question 1

Which of the following best describes an Arrhenius acid?

Accepted Answer

A substance that increases the concentration of hydrogen ions ($$H^+) in $$water.

Question 2

What is the product when sulfuric acid ($$H_2SO_4) $$fully dissociates in water?

Accepted Answer

$$H_2SO_4 \rightarrow 2H^+ + SO_4$^{2-}$$

Question 3

Which of the following is a property of bases?

Accepted Answer

They feel slippery and turn litmus paper blue.

Question 4

What is the molecular formula for calcium hydroxide?

Accepted Answer

Ca(OH)_2

Question 5

What is the pH of a solution with $$[H^+] = 1.0 	imes 10$$^{-3}$$ M?

Accepted Answer

pH = 3

Question 6

If the pH of a solution is 4.0, what is the concentration of hydrogen ions?

Accepted Answer

$$[H^+] = 1.0 	imes 10$$^{-4}$$ M

Question 7

Which of the following statements about strong acids is TRUE?

Accepted Answer

Strong acids fully dissociate in water.

Question 8

A buffer solution is important in biological systems because:

Accepted Answer

It keeps the pH constant despite addition of acids or bases.

Question 9

What is the pOH of a solution with $$[OH^-] = 1.0 	imes 10$$^{-5}$$ M?

Accepted Answer

pOH = 5

Question 10

Which equation correctly relates pH and pOH in aqueous solution?

Accepted Answer

$$pH + pOH = 14$$

Question 11

A solution has a pH of 2.33. What is the concentration of hydronium ions?

Accepted Answer

$$[H^+] = 4.68 	imes 10$$^{-3}$$ M

Question 12

Which of the following is a weak acid?

Accepted Answer

CH_3COOH

Question 13

What happens to the pH when the concentration of hydrogen ions increases?

Accepted Answer

The pH decreases.

Question 14

Which of the following best describes water in acid-base reactions?

Accepted Answer

Water is amphoteric, acting as either an acid or a base.

Question 15

A titration curve shows a sharp increase in pH at the equivalence point. What does this indicate?

Accepted Answer

A strong acid is being titrated with a strong base.

Question 16

If 30.68 mL of 0.030 M HCl is required to reach the equivalence point in a titration with Fe(OH)_3, how many moles of $$H^+$$ were added?

Accepted Answer

$$0.030 	imes 0.03068 = 0.0009204$$ mol

Question 17

Which of the following is a diprotic acid?

Accepted Answer

H_2SO_4

Question 18

What is the correct balanced equation for the neutralization of $$HNO_3$$ with KOH?

Accepted Answer

$$HNO_3 + $$KOH \rightarrow $$KNO_3 + H_2O$

Question 19

Which of the following statements about buffers is TRUE?

Accepted Answer

A buffer resists changes in pH when small amounts of acid or base are added.

Question 20

If $$[OH^-] = 1.0 	imes 10$$^{-5}$$ M, what is the pH of the solution?

Accepted Answer

pH = 9

Acids, Bases, pH, and Titration Study Guide for GOB College Chemistry

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