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Asam asetat  adalah asam lemah dengan. Perbandinga...

Asam asetat begin mathsize 14px style open parentheses C H subscript 3 C O O H close parentheses end style adalah asam lemah denganbegin mathsize 14px style space K subscript a space equals space 10 to the power of negative sign 5 end exponent end style. Perbandingan begin mathsize 14px style fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end style dalam larutan begin mathsize 14px style C H subscript 3 C O O K end style pada pH = 8 adalah ...

Jawaban:

Larutan penyangga asam

Menentukan nilai begin mathsize 14px style open square brackets H to the power of plus sign close square brackets end style:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell italic p H space end cell equals cell space minus sign space log space open square brackets H to the power of plus sign close square brackets end cell row cell 8 space end cell equals cell space minus sign space log space open square brackets H to the power of plus sign close square brackets end cell row cell open square brackets H to the power of plus sign close square brackets space end cell equals cell space 10 to the power of negative sign 8 end exponent end cell end table end style   

Sehingga nilai perbandingan begin mathsize 14px style fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end style yaitu:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets H to the power of plus sign close square brackets space end cell equals cell space Ka space cross times space fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end cell row cell 10 to the power of negative sign 8 end exponent space end cell equals cell space 10 to the power of negative sign 5 end exponent space cross times space fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end cell row cell fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction space end cell equals cell space 10 to the power of negative sign 8 end exponent over 10 to the power of negative sign 5 end exponent end cell row cell fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction space end cell equals cell space 10 to the power of negative sign 3 end exponent end cell row cell fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end cell equals cell 1 over 10 cubed end cell row cell fraction numerator open square brackets C H subscript 3 C O O H close square brackets over denominator open square brackets C H subscript 3 C O O to the power of minus sign close square brackets end fraction end cell equals cell 1 over 1000 end cell row blank blank blank end table end style     

Jadi, jawaban yang benar adalah 1 : 1000.

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