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Tentukan nilai pH larutan 0,001 M dengan !

Tentukan nilai pH larutan begin mathsize 14px style H subscript bold 2 S O subscript bold 3 end style 0,001 M dengan begin mathsize 14px style bold Ka bold equals bold 10 to the power of bold minus sign bold 5 end exponent end style!

Jawaban:

begin mathsize 14px style open square brackets H to the power of plus sign close square brackets equals square root of K subscript a space. space M end root open square brackets H to the power of plus sign close square brackets equals square root of 10 to the power of negative sign 5 end exponent space. space 10 to the power of negative sign 3 end exponent end root open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 4 end exponent space M  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 10 to the power of negative sign 4 end exponent pH equals 4 end style 
 

Jadi, pH larutan sebesar 4. 

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