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Tentukan pH larutan jika diketahui konsentrasi ion...

Tentukan pH larutan jika diketahui konsentrasi ion begin mathsize 14px style H to the power of bold plus sign end style suatu larutan adalah:

  • begin mathsize 14px style 1 cross times 10 to the power of negative sign 3 end exponent end style 
  • begin mathsize 14px style 5 cross times 10 to the power of negative sign 6 end exponent end style 

Diketahui begin mathsize 14px style left parenthesis log space 2 equals 0 comma 3 right parenthesis end style undefined 

Jawaban:

Dari pertanyaan di atas dapat diketahui bahwa asam tersebut merupakan asam kuat karena tidak memiliki begin mathsize 14px style K subscript a end style.

A. pH untuk begin mathsize 14px style bold open square brackets H to the power of bold plus sign bold close square brackets bold equals bold 1 bold cross times bold 10 to the power of bold minus sign bold 3 end exponent end style  

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pH equals cell negative sign log open square brackets H to the power of plus sign close square brackets end cell row pH equals cell negative sign log left square bracket 10 to the power of negative sign 3 end exponent right square bracket end cell row pH equals 3 row blank blank blank row blank blank blank end table end style 

Jadi pHnya adalah 3.
 

B. pH untuk begin mathsize 14px style bold open square brackets H to the power of bold plus sign bold close square brackets bold equals bold 5 bold cross times bold 10 to the power of bold minus sign bold 6 end exponent end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pH equals cell negative sign log open square brackets H to the power of plus sign close square brackets end cell row pH equals cell negative sign log left square bracket 5 cross times 10 to the power of negative sign 6 end exponent right square bracket end cell row pH equals cell 6 minus sign log space 5 end cell row blank blank blank end table end style 

Jadi pHnya adalah begin mathsize 14px style bold 6 bold minus sign bold log bold space bold 5 end style.

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