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10 mL larutan  dengan pH = 3 ditambahkan air hingg...

10 mL larutan begin mathsize 14px style H subscript 2 S O subscript 4 end style dengan pH = 3 ditambahkan air hingga volume larutan menjadi 1 Liter. Harga pH larutan yang terjadi adalah ...

  1. 1      space 

  2. 4      space 

  3. 5      space 

  4. 6      space 

  5. 9    space 

Jawaban:

begin mathsize 14px style pH equals 3 minus sign log space open square brackets H to the power of plus sign close square brackets equals 3 open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 3 end exponent  open square brackets H to the power of plus sign close square brackets double bond a cross times M subscript 1 10 to the power of negative sign 3 end exponent equals 2 cross times M subscript 1 M subscript 1 equals 5 cross times 10 to the power of negative sign 4 end exponent end style 

begin mathsize 14px style M subscript 1 cross times V subscript 1 double bond M subscript 2 cross times V subscript 2 5 cross times 10 to the power of negative sign 4 end exponent cross times 10 equals M subscript 2 cross times 1000 M subscript 2 equals 5 cross times 10 to the power of negative sign 6 end exponent  open square brackets H to the power of plus sign close square brackets double bond a cross times M subscript 2 open square brackets H to the power of plus sign close square brackets equals 2 cross times 5 cross times 10 to the power of negative sign 6 end exponent open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 5 end exponent  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 5 end exponent pH equals 5 end style  
  

Jadi, jawaban yang sesuai adalah C.space  

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