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Question

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Answer 1

You should learn that pH + pOH = 14

Also you should learn that [H+] x [OH-] = 1x10^-14

And also know that pH = -log [H+] and pOH = -log [OH-]

 

[OH-] = 4.8x10^-7

Thus pOH = 6.23 (7 and subtract the log of 4.8)

pH + pOH = 14 

pH = `14 - pOH

pH = 14 - 6.23

pH = 7.68