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Hitunglah pH larutan basa lemah dengan valensi 3 y...

Hitunglah pH larutan basa lemah dengan valensi 3 yang memiliki derajat ionisasi 0,2% dan begin mathsize 14px style K subscript italic b equals 4 x 10 to the power of negative sign 9 end exponent end style  space 

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Jawaban:

Misalkan senyawa bervalensi 3, begin mathsize 14px style X open parentheses O H close parentheses subscript 3 end style , memiliki konsentrasi mula-mula sebesar a.

  

Error converting from MathML to accessible text.

-menentukan konsentrasi begin mathsize 14px style O H to the power of minus sign end style

begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets equals 6 x 10 to the power of negative sign 3 end exponent middle dot a open square brackets O H to the power of minus sign close square brackets equals 6 x 10 to the power of negative sign 3 end exponent middle dot 2 comma 1 open square brackets O H to the power of minus sign close square brackets equals 1 comma 26 x 10 to the power of negative sign 2 end exponent space M end style

-menentukan nilai begin mathsize 14px style pH end style

begin mathsize 14px style pOH equals minus sign log open square brackets O H to the power of minus sign close square brackets pOH equals minus sign log left parenthesis 1 comma 26 x 10 to the power of negative sign 2 end exponent right parenthesis pOH equals 2 minus sign log space 1 comma 26  pOH and pH double bond pKw left parenthesis 2 minus sign log space 1 comma 26 right parenthesis plus pH equals 14 pH equals 14 minus sign left parenthesis 2 minus sign log space 1 comma 26 right parenthesis pH equals 12 plus log space 1 comma 26 end style

 

 

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