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CHM 142 EXAM 1 2024 QUESTIONS AND ANSWERS
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CHM 142 EXAM 1 2024 QUESTIONS AND ANSWERS
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CHM 142 EXAM 1 2024 QUESTIONS ANDANSWERS
Compounds that contain electron-rich ___ are weak bases
N
True or false: Amines such as CH3CH2NH2 are weak bases
True
Soluble hydroxides are _______ bases
strong
Which of the following is NOT a conjugate acid-base pair?
H2S/HS-
NH3/NH2-
H3PO4/H2PO4-
H2PO4-/PO4^3-
HCO3-/CO3^2-
H2PO4-/PO4^3-
,Which is a stronger acid? HF or HBr
HBr
Strong acids dissociate _________ into ions in water.
Completely
Large Ka value = _____ pKa value and vice versa
low
Ka * Kb =
Kw (1E-14)
The grater the value of Kb, the _____ the base.
Stronger
, A 0.015M solution of butanoic acid, CH3CH2CH2COOH, contains 1.51E-3M
H30+. What is the Ka of butanoic acid?
1.5E-5
True or false: A weak base is a weak electrolyte
FALSE (A weak acid is a weak electrolyte)
Calculate the pH and [H30+] or a 0.080M solution of NaOH
[H3O+]= 1.3E-13M
pH=12.90
In a Bronsted-Lowry acid-base reaction, the acid reacts to form its ________
____________ and the base will form its _________ _______.
Conjugate base; conjugate acid
A salt consisting of the _______ of a strong acid and the ________ of a strong base
yields a neutral solution.
a) anion, cation
b) anion, anion
c) cation, cation
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