{"id":186568,"date":"2025-01-25T09:26:43","date_gmt":"2025-01-25T09:26:43","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=186568"},"modified":"2025-01-25T09:26:46","modified_gmt":"2025-01-25T09:26:46","slug":"in-an-arrhenius-acid-base-context-the-compounds-koh-h2so4-and-hno3-when-dissolved-in-water","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/25\/in-an-arrhenius-acid-base-context-the-compounds-koh-h2so4-and-hno3-when-dissolved-in-water\/","title":{"rendered":"In an Arrhenius acid-base context, the compounds KOH, H2SO4, and HNO3 when dissolved in water"},"content":{"rendered":"\n

14.1   Multiple Choice<\/p>\n\n\n\n

1) In an Arrhenius acid-base context, the compounds KOH, H2SO4, and HNO3 when dissolved in water, function respectively as a(n) ________.<\/p>\n\n\n\n

A) base, acid and acid<\/p>\n\n\n\n

B) acid, base and base<\/p>\n\n\n\n

C) base, acid and base<\/p>\n\n\n\n

D) base, base and acid<\/p>\n\n\n\n

2) Each of the following can act like a Bronsted-Lowry acid and Bronsted-Lowry base except<\/em>:<\/p>\n\n\n\n

A) NH4+<\/p>\n\n\n\n

B) H2PO4-<\/p>\n\n\n\n

C) HCO3-<\/p>\n\n\n\n

D) HS-<\/p>\n\n\n\n

3) A Bronsted-Lowry acid is defined as a substance that ________.<\/p>\n\n\n\n

A) increases the [H+] concentration when placed in water<\/p>\n\n\n\n

B) decreases the [H+] concentration when placed in water<\/p>\n\n\n\n

C) acts as a proton donor in any system<\/p>\n\n\n\n

D) acts as a proton acceptor in any system<\/p>\n\n\n\n

4) According to the Bronsted-Lowry theory, a base is ________.<\/p>\n\n\n\n

A) a hydronium ion donor<\/p>\n\n\n\n

B) a proton donor<\/p>\n\n\n\n

C) a proton acceptor<\/p>\n\n\n\n

D) a hydroxide ion acceptor<\/p>\n\n\n\n

5) Which of the following could not<\/em> be a Bronsted-Lowry acid?<\/p>\n\n\n\n

A) HF<\/p>\n\n\n\n

B) HC2H3O2<\/p>\n\n\n\n

C) CN\u2212<\/p>\n\n\n\n

D) HS\u2212<\/p>\n\n\n\n

6) The Bronsted-Lowry acid and base for the reaction<\/p>\n\n\n\n

NH4+ + CN\u2212 –> NH3 + HCN are, respectively, ________.<\/p>\n\n\n\n

A) NH3 and CN\u2212<\/p>\n\n\n\n

B) NH4+ and HCN<\/p>\n\n\n\n

C) CN\u2212 and HCN<\/p>\n\n\n\n

D) NH4+ and CN\u2212<\/p>\n\n\n\n

7) Which of the following is incorrectly <\/em>classified as an acid, a base, a salt, or an amphoteric species?<\/p>\n\n\n\n

A) H2Sacid<\/p>\n\n\n\n

B) NH4+base<\/p>\n\n\n\n

C) LiOHbase<\/p>\n\n\n\n

D) HS\u2212amphoteric<\/p>\n\n\n\n

8) Which of the following is not <\/em>a conjugate acid\/base pair?<\/p>\n\n\n\n

A) PH4+\/PH3<\/p>\n\n\n\n

B) H2O\/OH\u2212<\/p>\n\n\n\n

C) HSO4\u2212\/SO42\u2212<\/p>\n\n\n\n

D) S2\u2212\/H2S<\/p>\n\n\n\n

9) From the choices below, identify a conjugate acid-base pair. (The acid is listed first in the pair.)<\/p>\n\n\n\n

H2PO4\u2212 + S2\u2212 –> HS\u2212 + HPO42\u2212<\/p>\n\n\n\n

Acid     Conjugate Base<\/p>\n\n\n\n

A) S-2 HS-<\/p>\n\n\n\n

B) H2PO4-S-2<\/p>\n\n\n\n

C) H2PO4-HPO4-2<\/p>\n\n\n\n

D) HS-H2PO4-<\/p>\n\n\n\n

10) Which of the following pairs of acids and conjugate bases is incorrectly<\/em> labeled?<\/p>\n\n\n\n

Acid     Conjugate Base<\/p>\n\n\n\n

A) HSO4-SO4-2<\/p>\n\n\n\n

B) HFO2HFO3<\/p>\n\n\n\n

C) HSO3-SO3-2<\/p>\n\n\n\n

D) NH4+NH3<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

Here are the answers with brief explanations for each question:<\/p>\n\n\n\n

1) In an Arrhenius acid-base context, the compounds KOH, H2SO4, and HNO3 when dissolved in water, function respectively as a(n) ________.<\/strong><\/p>\n\n\n\n

Answer: A) base, acid, and acid<\/strong><\/p>\n\n\n\n

Explanation:<\/strong><\/p>\n\n\n\n