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Suatu basa lemah 0,01 M mempunyai nilai pH=10+log ...

Suatu basa lemah begin mathsize 14px style B O H end style 0,01 M mempunyai nilai pH=10+log 2. Hitunglah nilai begin mathsize 14px style K subscript b end style basa tersebut !

Jawaban:

begin mathsize 14px style pH equals 10 plus log space 2 pH and pOH equals 14 space space space space space space space space pOH equals 14 minus sign left parenthesis 10 plus log space 2 right parenthesis space space space space space space space space space space space space space space space equals 4 minus sign log space 2 pOH equals minus sign log space open square brackets O H to the power of minus sign close square brackets 4 minus sign log space 2 equals minus sign log space open square brackets O H to the power of minus sign close square brackets space open square brackets O H to the power of minus sign close square brackets equals 2.10 to the power of negative sign 4 end exponent  open square brackets O H to the power of minus sign close square brackets equals square root of K subscript b cross times M end root 2.10 to the power of negative sign 4 end exponent equals square root of K subscript b cross times 10 to the power of negative sign 2 end exponent end root space K subscript b space space space equals 4.10 to the power of negative sign 6 end exponent space space space space space space space space end style

Jadi, begin mathsize 14px style K subscript b space pada space larutan space B O H equals 4.10 to the power of negative sign 6 end exponent end style.

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