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Diketahui suatu larutan X mempunyai [H+]=10−5M, bila harga Kw=1×10−14 Maka konsentrasi OH− dalam larutan itu adalah . . . .

Pertanyaan

Diketahui suatu larutan X mempunyai begin mathsize 14px style open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 5 end exponent M end style, bila harga begin mathsize 14px style Kw equals 1 cross times 10 to the power of negative sign 14 end exponent end style Maka konsentrasi begin mathsize 14px style O H to the power of minus sign end style dalam larutan itu adalah . . . .

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

  2. begin mathsize 14px style 10 to the power of negative sign 6 end exponent end style 

  3. begin mathsize 14px style 10 to the power of negative sign 7 end exponent end style 

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

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

N. Puspita

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah D.

Pembahasan

Kw atau konstanta ionisasi air merupakan perkalian antara open square brackets H to the power of plus sign close square brackets dengan open square brackets O H to the power of minus sign close square brackets

table attributes columnalign right center left columnspacing 0px end attributes row cell K subscript w end cell equals cell open square brackets H to the power of plus sign close square brackets cross times open square brackets O H to the power of minus sign close square brackets end cell row cell 1 cross times 10 to the power of negative sign 14 end exponent end cell equals cell 10 to the power of negative sign 5 end exponent cross times open square brackets O H to the power of minus sign close square brackets end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell fraction numerator 1 cross times 10 to the power of negative sign 14 end exponent over denominator 10 to the power of negative sign 5 end exponent end fraction end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell 10 to the power of negative sign 9 end exponent end cell end table 

Maka, konsentrasi ion O H to the power of minus sign dalam larutan tersebut adalah 10 to the power of negative sign 9 end exponent.

Jadi, jawaban yang tepat adalah D.

116

5.0 (2 rating)

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