Ka*Kb=Kw
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Re: Ka*Kb=Kw
It does not make a difference for calculations since 10^-14 and 1.0 x 10^-14 are the same thing but you should note that 1.0 x 10^-14 gives you two sig figs which would be useful to have the correct number of sig figs in your answer.
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Re: Ka*Kb=Kw
No, in calculation you should get the same thing since 1 times anything is still that value. Just make sure to keep sig. figs. in mind.
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Re: Ka*Kb=Kw
Kw= 10^-14 and Kw= 1.0 * 10 ^-14 are the same but I believe in the book they used 1.0 * 10 ^-14 because it helps keeping up with the sig figs. But remember that Kw=10 ^-14 ONLY at 25 degrees Celsius.
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