Civil Engineering - GATE Exam Questions - Discussion

45. 

Two samples of water A and B have pH values of 4.4 and 6.4 respectively. How many times more acidic sample A is than sample B ?

[A]. 0
[B]. 50
[C]. 100
[D]. 200

Answer: Option C

Explanation:

No answer description available for this question.

Sadashiva said: (Jan 14, 2017)  
10^-4.4/10^-6.4.
= 100.

Prakash said: (Aug 23, 2017)  
Please, explain the answer.

Naresharjun said: (Jan 4, 2021)  
PH of sample A = -log10(Ha+) = 10^-4.4,
PH of sample B = -log20(Hb+) = 10^-6.4,
PH A/PH B = 10^-4.4/10^-6.4 = 10^2 = 100.
PH A is 100 times acidic Than PH B.

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