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Larutan HA 0,1 M mempunyai pH = 3 . Hitunglah nilai K a ​ dan derajat ionisasi ( α ) asam tersebut.

Larutan HA 0,1 M mempunyai  .Hitunglah nilai  dan derajat ionisasi  asam tersebut.

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Y. Rochmawatie

Master Teacher

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nilai dan asam HA berturut-turut sebesar dan

nilai undefined dan begin mathsize 14px style italic alpha end style asam HA berturut-turut sebesar begin mathsize 14px style bold 10 to the power of bold minus sign bold 5 end exponent end style dan 

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menentukan menentukan nilai derajat ionisasi Jadi, nilai dan asam HA berturut-turut sebesar dan

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

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell M subscript a end cell equals cell 0 comma 1 space M end cell row blank equals cell 10 to the power of negative sign 1 end exponent space M end cell end table end style

  • menentukan begin mathsize 14px style K subscript a end style

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 middle dot M subscript a end root end cell row cell 10 to the power of negative sign 3 end exponent end cell equals cell square root of K subscript a middle dot 10 to the power of negative sign 1 end exponent end root end cell row cell open parentheses 10 to the power of negative sign 3 end exponent close parentheses squared end cell equals cell open parentheses square root of K subscript a middle dot 10 to the power of negative sign 1 end exponent end root close parentheses squared end cell row cell 10 to the power of negative sign 6 end exponent end cell equals cell K subscript a middle dot 10 to the power of negative sign 1 end exponent end cell row cell K subscript a end cell equals cell 10 to the power of negative sign 6 end exponent over 10 to the power of negative sign 1 end exponent end cell row cell K subscript a end cell equals cell 10 to the power of negative sign 5 end exponent end cell end table end style

  • menentukan nilai derajat ionisasi

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row alpha equals cell square root of K subscript a over M subscript a end root end cell row blank equals cell square root of 10 to the power of negative sign 5 end exponent over 10 to the power of negative sign 1 end exponent end root end cell row blank equals cell square root of 10 to the power of negative sign 4 end exponent end root end cell row blank equals cell 10 to the power of negative sign 2 end exponent end cell end table end style

Jadi, nilai undefined dan begin mathsize 14px style italic alpha end style asam HA berturut-turut sebesar begin mathsize 14px style bold 10 to the power of bold minus sign bold 5 end exponent end style dan 

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