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What is pH of 2 x 10^(-8)molar HCI solution? Here log2 = 0.301 and log3 = 0.477 (A) 5.4 (B) 7.7 (C) 6.92 (D) 9.5​

What is pH of 2 x 10^(-8)molar HCIsolution? Here log2 = 0.301 and
log3 = 0.477
(A) 5.4
(B) 7.7
(C) 6.92
(D) 9.5​

Grade:11

1 Answers

abhay gupta
askIITians Faculty 199 Points
3 years ago
answers:

∴[H
+
]=[H
+
]
water
​
+[H
+
]
HCl
​


=10
−7
+2×10
−8
=12×10
−8


∴pH=−log[12×10
−18
]

=−log[2
2
×3×10
−8
]

=−[2 log(2)+ log(3)+ log(10
−8
)= 6.92.
Option A 5.4

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