conjugate acids and bases, pH and pOH

An Arrhenius acid must contain ___ and ionize to produce ___.

• hydrogen ions; a solution with a pH greater than 7
• hydrogen; hydrogen ions
• hydroxide ion; hydroxide ions
• hydroxide ion; a solution with a pH greater than 7

Tags

NGSS.HS-PS1-1

According to Brønsted-Lowry theory of acids and bases, a base is ___.

• a proton acceptor
• a proton donor
• a compound that dissolves in water to produce OH^-
• an electron donor

The conjugate base of H₂SO₄ is ___.

• H₂SO₃

• HSO₄^-

• H₃SO₄⁺

• SO₄^-2

In the reaction represented by  $H_2C_2O_4+CH_3NH_2\ \ \rightarrow\ \ HC_2O_4^-+CH_3NH_3^+,$   Which of these is a conjugate acid to the base  $CH_3NH_2$ ?

• None

•  $H_2C_2O_4$  

•  $CH_2NH_3^+$  

•  $HC_2O_4^-$  

What is the conjugate acid of water?

• $OH^-$

• $H_3O^+$

• $H_2O_2$

• $HOH$

The value of Kw at 25 ^oC is always _____________

• 1.0 x 10^-11

• 1.0 x 10^-12

• 1.0 x 10^-13

• 1.0 x 10^-14

What are the highest concentrations of Hydronium (H₃O⁺) and Hydroxide (OH^-) ions that can coexist in a water solution

• 1.0 x 10 ^-14 each

• 1.0 x 10⁰ and 1.0 x 10^-14

• 1.0 x 10^-7 each

A strong base in a water solution

• is a weak electrolyte

• produces many H⁺ ions

• will not dissolve

• completely dissociates into ions.

Which of the following substances has the highest concentration of hydrogen ions in solution?

• bleach (pH = 11-13)
• water (pH = 7)
• tomato juice (pH = 4-5)
• vinegar (pH = 3-4)

What is the pH of a solution with a hydrogen ion concentration of 1.0 x 10^-8 M?

(HINT...pH = -log [H⁺] )

• -8

• 6

• 8

• 14