In a certain acidic solution at 25 degrees Celsius, [H+] is 100 times greater than [OH-]. What is the value for [OH-] for the solution ?

Answer 1

#["OH"^-]=1xx10^6# #"M"#

We have #["H"^+]=100["OH"^-]# at #25^@sf(C)#. We also know that, at #25^@sfC#, #"K"_"w"=1xx10^14# and that #"K"_"w"-=["H"^+]["OH"^-]#

#["H"^+]["OH"^-]=100["OH"^-]^2=1xx10^14# #"M"#

#["OH"^-]^2=1xx10^12# #"M"#

#["OH"^-]=1xx10^6# #"M"#

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Answer 2

Cooper Anderson

The value for [OH-] for the solution is 1.0 x 10^-12 M.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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