Q: If lemon juice has $$[\mathrm{H_3O^+}] = 2.0 \times 10$$^{-3}$$\ \mathrm{M}$$, what is $$[\mathrm{OH^-}] in $$the solution? (Assume $$K_w = 1.0 \times 10$$^{-14}$$)

$$5.0 \times 10$$^{-11}$$\ \mathrm{M}$$

Q: What is the $$[\mathrm{H_3O^+}]$$ for a solution with pH = 3.42?

$$3.8 \times 10$$^{-4}$$\ \mathrm{M}$$

Q: Which of the following solutions is basic?

pancreatic fluid, $$[\mathrm{H_3O^+}] = 1 \times 10$$^{-8}$$\ \mathrm{M}$$

Question 1

Which of the following is the correct name for the acid with the formula $$\mathrm{HBr}$$?

Accepted Answer

hydrobromic acid

Question 2

Which compound is a strong base?

Accepted Answer

$$\mathrm{NaOH}$$

Question 3

Which of the following is a characteristic of a base?

Accepted Answer

has a chalky taste

Question 4

Given the reaction $$\mathrm{$$HNO_2$$} + \mathrm{H_2O} \rightarrow \mathrm{NO_2$^-} + \mathrm{H_3O^+}$$, which is the Brønsted–Lowry acid?

Accepted Answer

$$\mathrm{$$HNO_2$$}$$

Question 5

What is the conjugate base of $$\mathrm{H_2CO_3}$$?

Accepted Answer

$$\mathrm{$$HCO_3$$^-}$$

Question 6

Which of the following pairs is an acid–base conjugate pair?

Accepted Answer

$$\mathrm{$$HNO_2$$}$$ and $$\mathrm{NO_2$^-}$$

Question 7

Which acid is stronger: $$\mathrm{$$HNO_2$$} or$$ $$\mathrm{H_2S}$$?

Accepted Answer

$$\mathrm{$$HNO_2$$}$$

Question 8

What is the acid dissociation expression ($$K_a) $$for nitrous acid, $$\mathrm{$$HNO_2$$}$$?

Accepted Answer

$$K_a = \dfrac{[\mathrm{NO_2$^-}][\mathrm{H_3O^+}]}{[\mathrm{$$HNO_2$$}]}$$

Question 9

If lemon juice has $$[\mathrm{H_3O^+}] = 2.0 	imes 10$$^{-3}$$\ \mathrm{M}$$, what is $$[\mathrm{OH^-}] in $$the solution? (Assume $$K_w = 1.0 	imes 10$$^{-14}$$)

Accepted Answer

$$5.0 	imes 10$$^{-11}$$\ \mathrm{M}$$

Question 10

A solution has a $$[\mathrm{H_3O^+}] of$$ $$4.0 	imes 10$$^{-5}$$\ \mathrm{M}. $$What is its pH?

Accepted Answer

pH = 4.40

Question 11

What is the $$[\mathrm{H_3O^+}]$$ for a solution with pH = 3.42?

Accepted Answer

$$3.8 	imes 10$$^{-4}$$\ \mathrm{M}$$

Question 12

Which of the following solutions is basic?

Accepted Answer

pancreatic fluid, $$[\mathrm{H_3O^+}] = 1 	imes 10$$^{-8}$$\ \mathrm{M}$$

Question 13

Which of the following is the correct balanced equation for the reaction between $$\mathrm{Mg(OH)_2} (s) $$and $$\mathrm{HBr} (aq$$)?

Accepted Answer

$$\mathrm{Mg(OH)_2} + 2\mathrm{HBr} \rightarrow \mathrm{$$MgBr_2$$} + 2\mathrm{H_2O}$$

Question 14

Which set of coefficients correctly balances the neutralization reaction: $$\mathrm{HCl} + \mathrm{Al(OH)_3} \rightarrow \mathrm{$$AlCl_3$$} + \mathrm{H_2O}$$?

Accepted Answer

3, 1, 1, 3

Question 15

Which of the following is the correct conjugate acid of $$\mathrm{NO_2$^-}$$?

Accepted Answer

$$\mathrm{$$HNO_2$$}$$

Question 16

A patient is given a solution with $$[\mathrm{OH^-}] = 3 	imes 10$$^{-10}$$\ \mathrm{M}. Is $$the solution acidic, basic, or neutral?

Accepted Answer

Acidic

Question 17

Which of the following is a weak acid?

Accepted Answer

$$\mathrm{$$HNO_2$$}$$

Question 18

Which of the following is the correct acid dissociation expression for $$\mathrm{H_2CO_3}$$?

Accepted Answer

$$K_a = \dfrac{[\mathrm{$$HCO_3$$^-}][\mathrm{H_3O^+}]}{[\mathrm{H_2CO_3}]}$$

Question 19

Which of the following is the correct formula for calcium hydroxide?

Accepted Answer

$$\mathrm{Ca(OH)_2}$$

Acids and Bases: Step-by-Step Study Guidance (CHMY 121, Chapter 11)

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