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Hitunglah pH dan konsentrasi ion H + , jika : α = 0,04 dan konsentrasi 0,03M

Hitunglah pH dan konsentrasi ion , jika :

 = 0,04 dan konsentrasi 0,03 M 

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Menentukan tetapan ionisasi asam lemah ( Ka) Menentukan konsentrasi ion Menentukan pH Jadi, nilai

Menentukan tetapan ionisasi asam lemah ( Ka)

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

open square brackets H to the power of plus sign close square brackets equals space square root of Ka space x space end root M open square brackets H to the power of plus sign close square brackets equals space square root of left parenthesis 48 space x space 10 to the power of negative sign 6 end exponent right parenthesis space left parenthesis space end root 3 space x space 10 to the power of negative sign 2 end exponent right parenthesis open square brackets H to the power of plus sign close square brackets equals square root of 144 space x space 10 to the power of negative sign 8 end exponent end root open square brackets H to the power of plus sign close square brackets equals 12 space x space 10 to the power of negative sign 4 end exponent

 

Menentukan pH 

pH equals minus sign log space open square brackets H to the power of plus sign close square brackets pH equals minus sign log space left square bracket 12 cross times 10 to the power of negative sign 4 end exponent right square bracket pH equals minus sign log space open square brackets 1 comma 2 cross times 10 to the power of 1 cross times 10 to the power of negative sign 4 end exponent close square brackets pH equals minus sign log space open square brackets 1 comma 2 cross times 10 to the power of negative sign 3 end exponent close square brackets pH equals 3 minus sign log space 1 comma 2

Jadi, nilai  open square brackets H to the power of plus sign close square brackets space equals space 12 space x space 10 to the power of negative sign 4 end exponent space dan space pH space equals 3 space minus sign space log space 1 comma 2

 

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