Chemistry Question?

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73. What is the Ksp of a saturated solution of silver bromide, AgBr, when {Br-] = 7.1 x 10^-7M
a)5.0 x 10^-13
b) 7.1 x 10^-7
c) 1.4 x 10^-6
d) 8.4 x 10^-4

74. What is the pH of 0.010 M KOH solution?
a) 0.010
b) 2.00
c) 12.00
d) 13.99

76. Which represents the functional group for an organic acid?
a) -O-
b)-OH
c) -COO-
d)-COOH-

2007-08-23 03:33:40 · 2 answers · asked by ashley t 1 in Science & Mathematics ➔ Chemistry

2 answers

73.
AgBr <---> Ag+ + Br-
[Ag+] = [Br-]
Ksp = [Ag+] [ Br-] = (7.1 x 10^-7) ( 7.1 x 10^-7 ) = 5.0 x 10^-13

74.
KOH >> K+ + OH-
[OH-] = 0.010
pOH = - log 0.01 = 2.00
pH = 14 - pOH = 14 - 2.00 = 12.00

76.
d) - COOH
such as CH3COOH acetic acid

2007-08-23 03:50:02 · answer #1 · answered by Dr.A 7 · 0⤊ 0⤋

a , c and d

2007-08-23 11:02:59 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 1⤋