# chemistry

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Processed cheese must be at a pH of 5.5 to 5.9 to prevent the growth of unwanted microorganisms. If sample of cheeese has an [OH^-]of 7.76*10^-9, what does it mean? Show calculation. I really need help with please. Kindly show me hoe to compute it thanks a lot.

• chemistry -

You're over thinking this problem.
(H^+)(OH^-) = Kw = 1E-14
Substitute OH and solve for H^+.
Then pH = -log(H^+) and compare with th range of 5.5 to 5.9

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