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100
Pickles and lemons have a sour taste. What types of substances are in pickles to give them this sour taste? a) acids b) bases c) salts
What is a) acids
100
Which of the following is a hydronium ion? a) H3O+ b) H+ c) H2O d) OH
What is a) H3O+
100
Which type of substance is an electron-pair acceptor? a) Lewis acid b) Brønsted-Lowry base c) Brønsted-Lowry acid d) Lewis base
What is a) Lewis acid
200
What happens when an acid reacts with a metal such as magnesium? a) A chemical reaction occurs. b) The acid is converted to a base. c) The temperature decreases. d) The metal becomes polished and shiny.
What is a) A chemical reaction occurs.
200
According to the Brønsted-Lowry definition, which of the following is formed when a base dissociates in water? a) a salt b) a conjugate acid c) a conjugate base d) a stronger acid
What is b) a conjugate acid
200
What is true of acids? a) They have a pH above 9. b) They have a pH below 7. c) They are poor electrolytes. d) They have a strong affinity for H+ ions.
What is b) They have a pH below 7.
300
Which type of reaction occurs between an acid and a base and results in the formation of a salt and water? a) neutralization reaction b) base-dissociation reaction c) acid-dissociation reaction d) strong acid-weak base reaction
What is a) neutralization reaction
300
Which of the following formulas is used to determine the pH of a solution? a) pH = [OH ] b) pH = log[H+] c) pH = log[OH ] d) pH = log[H+]
What is b) pH = log[H+]
300
What is the [H+] of a solution with a pH of 5.6? Use a scientific calculator. a) 5.0 × 10 5 b) 8.3 × 10 6 c) 2.5 × 10 6 d) 7.7 × 10 5
What is c) 2.5 × 10 6
400
Which of the following is the Brønsted-Lowry definition of an acid? a) a substance that dissociates in water to produce hydroxide ions (OH ) b) a substance that dissociates in water to produce hydrogen ions (H+) c) any substance that can donate hydrogen ions (H+) d) any substance that can accept hydrogen ions(H+)
What is c) any substance that can donate hydrogen ions (H+)
400
A solution of wheat flour and water has a [H+] of 1 × 10 8 M. Which of the following describes what type of solution this is? a) acidic b) basic c) neutral
What is b) basic
400
What is the pH of pure water? a) 7 b) 10 c) 12 d) 13
What is a) 7
500
Which of the following is a Brønsted-Lowry base but not an Arrhenius base? a) NH3 b) NaOH c) KOH d) Ca(OH)2
What is a) NH3
500
Brønsted and Lowry defined an acid as which of the following? a) substance that donates H+ ions b) substance that accepts H+ ions c) substance that accepts a pair of electrons to form a covalent bond d) substance that donates a pair of electrons to form a covalent bond
What is a) substance that donates H+ ions
500
Which of the following [H+] values describes the most acidic solution? a) 10 1 M b) 10 7 M c) 10 12 M d) 10 14 M
What is a) 10 1 M
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