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Hitunglah nilai pH untuk larutan berikut : NH 3 ​ 0,02M ( 1 , 8 × 1 0 − 5 )

Hitunglah nilai pH untuk larutan berikut :

 0,02 M ()

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S. Lubis

Master Teacher

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pH larutan adalah 10 + log 6.

pH larutan begin mathsize 14px style N H subscript 3 end style adalah 10 + log 6.

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adalah basa lemah. Jadi, pH larutan adalah 10 + log 6.

begin mathsize 14px style N H subscript 3 end style adalah basa lemah.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of K subscript italic b cross times M end root end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of 1 comma 8 cross times 10 to the power of negative sign 5 end exponent cross times 0 comma 02 end root end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of 36 cross times 10 to the power of negative sign 8 end exponent end root end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell 6 cross times 10 to the power of negative sign 4 end exponent end cell row blank blank blank row pOH equals cell negative sign log space open square brackets O H to the power of minus sign close square brackets end cell row pOH equals cell negative sign log space 6 cross times 10 to the power of negative sign 4 end exponent end cell row pOH equals cell 4 minus sign log space 6 end cell row pH equals cell 14 minus sign pOH end cell row pH equals cell 14 minus sign left parenthesis 4 minus sign log space 6 right parenthesis end cell row pH equals cell 10 plus log space 6 end cell end table end style 

Jadi, pH larutan begin mathsize 14px style N H subscript 3 end style adalah 10 + log 6.

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