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Pertanyaan

pH suatu larutan asam lemah, begin mathsize 14px style MOH end style 0,001 M sebesar 5-log 2, maka harga begin mathsize 14px style K subscript a end style asam tersebut adalah ...undefinedundefined 

  1. begin mathsize 14px style 10 to the power of negative sign 11 end exponent end style undefined 

  2. begin mathsize 14px style 10 to the power of negative sign 10 end exponent end style undefined 

  3. begin mathsize 14px style 10 to the power of negative sign 9 end exponent end style undefined 

  4. begin mathsize 14px style 10 to the power of negative sign 4 end exponent end style undefined 

  5. begin mathsize 14px style 10 to the power of negative sign 3 end exponent end style undefined 

N. Puspita

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban tidak ada di dalam opsi jawaban.

Pembahasan

Tahap 1. Menentukan nilai open square brackets H to the power of plus sign close square brackets

table attributes columnalign right center left columnspacing 0px end attributes row pH equals cell 5 minus sign log space 2 end cell row cell open square brackets H to the power of plus sign close square brackets end cell equals cell 2 cross times 10 to the power of negative sign 5 end exponent end cell end table

 

Tahap 2. Menentukan nilai K subscript a

table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets H to the power of plus sign close square brackets end cell equals cell square root of K subscript a cross times M end root end cell row cell 2 cross times 10 to the power of negative sign 5 end exponent end cell equals cell square root of K subscript a cross times 10 to the power of negative sign 3 end exponent end root end cell row cell left parenthesis 2 cross times 10 to the power of negative sign 5 end exponent right parenthesis squared end cell equals cell open parentheses square root of K subscript a cross times 10 to the power of negative sign 3 end exponent end root close parentheses squared end cell row cell 4 cross times 10 to the power of negative sign 10 end exponent end cell equals cell K subscript a cross times 10 to the power of negative sign 3 end exponent end cell row cell K subscript a end cell equals cell fraction numerator 4 cross times 10 to the power of negative sign 10 end exponent over denominator 10 to the power of negative sign 3 end exponent end fraction end cell row cell K subscript a end cell equals cell 4 cross times 10 to the power of negative sign 7 end exponent end cell row blank blank blank end table

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