. Calculate the concentration of H+ ions in 0.2 M
solution of CH2COOH. K, for CH2COOH = 1.8 x 10-5.
P
tion in 0.1 M
Answers
Answered by
1
Answer:
Explanation:
HCOOH →
HCOO
−
+
H
+
Initial concentration (M)
0.2
6.4×10
−3
6.4×10
−3
Equilibrium concentration (M)
0.2+x 1 6.4×10
−3
−x
K=
[HCOOH]
[HCOO
−
][H
+
]
=
0.2+x
6.4×10
−3
−x
=2.4×10
−4
⟹x=0.00635
[H
+
]=6.4×10
−3
−0.00635
=4.9×10
−5
pH=−log[H
+
]
=−log 4.9×10
−5
=4.305
Hence, the answer to the nearest integer is 4.
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