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Konsentrasi ion  dalam larutan asam sianida  mol/L. Apabila harga  asam sianida , konsentrasi molar larutan asam tersebut adalah .... M.

Pertanyaan

Konsentrasi ion begin mathsize 14px style H to the power of plus sign end style dalam larutan asam sianida begin mathsize 14px style open parentheses H C N close parentheses space 8 cross times 10 to the power of negative sign 4 end exponent end style mol/L. Apabila harga begin mathsize 14px style K subscript a end style asam sianida begin mathsize 14px style 1 comma 6 cross times 10 to the power of negative sign 5 end exponent end style, konsentrasi molar larutan asam tersebut adalah .... M.

  1. 0,20undefined 

  2. 0,02undefined 

  3. 0,40undefined 

  4. 0,04undefined 

  5. 0,80undefined 

Pembahasan Soal:

begin mathsize 14px style 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 8 cross times 10 to the power of negative sign 4 end exponent end cell equals cell square root of 1 comma 6 cross times 10 to the power of negative sign 5 end exponent cross times M end root end cell row cell open parentheses 8 cross times 10 to the power of negative sign 4 end exponent close parentheses squared end cell equals cell 1 comma 6 cross times 10 to the power of negative sign 5 end exponent cross times M end cell row cell 64 cross times 10 to the power of negative sign 8 end exponent end cell equals cell 1 comma 6 cross times 10 to the power of negative sign 5 end exponent cross times M end cell row M equals cell fraction numerator 64 cross times 10 to the power of negative sign 8 end exponent over denominator 1 comma 6 cross times 10 to the power of negative sign 5 end exponent end fraction end cell row blank equals cell 40 cross times 10 to the power of negative sign 3 end exponent end cell row blank equals cell 0 comma 04 space M end cell end table end style  


Jadi, jawaban yang tepat adalah D.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 01 April 2021

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