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Tentukanlah  dan  dalam larutan yang nilai pH-nya ...

Tentukanlah undefined dan undefined dalam larutan yang nilai pH-nya :

10,7 (diketahui begin mathsize 14px style log space 2 equals 0 comma 3 end style

Jawaban:

Penentuan undefined dan undefined berdasarkan hubungan terhadap pH dan undefined (pH = 10,7; undefined).

  • Penentuan undefined.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pH equals cell 10 comma 7 end cell row pH equals cell 11 minus sign 0 comma 3 end cell row pH equals cell 11 minus sign log space 2 end cell row blank blank blank row pH equals cell negative sign log space open square brackets H to the power of plus sign close square brackets end cell row cell 11 minus sign log space 2 end cell equals cell negative sign log space open square brackets H to the power of plus sign close square brackets end cell row cell space open square brackets H to the power of plus sign close square brackets end cell equals cell 2 cross times 10 to the power of negative sign 11 end exponent end cell end table end style    

 

  • Penentuan undefined.

   begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell K subscript italic w end cell equals cell open square brackets O H to the power of minus sign close square brackets cross times open square brackets H to the power of plus sign close square brackets end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell fraction numerator K subscript italic w over denominator open square brackets H to the power of plus sign close square brackets end fraction end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell fraction numerator 1 cross times 10 to the power of negative sign 14 end exponent over denominator 2 cross times 10 to the power of negative sign 11 end exponent end fraction end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell 0 comma 5 cross times 10 to the power of negative sign 3 end exponent end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell 5 cross times 10 to the power of negative sign 4 end exponent end cell end table end style 


Jadi, nilai undefined dan undefined berturut-turut adalah begin mathsize 14px style 2 cross times 10 to the power of negative sign 11 end exponent end style dan begin mathsize 14px style 5 cross times 10 to the power of negative sign 4 end exponent end style.

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