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Kelarutan SrSO 4 ​ dalam H 2 ​ SO 4 ​ adalah 7 x 1 0 − 5 . Jika molaritas ion SO 4 2 − ​ dari diabaikan, pH H 2 ​ SO 4 ​ tersebut adalah ... ( K s p ​ SrSO 4 ​ = 2 , 8 x 1 0 − 7 )

Kelarutan dalam adalah  . Jika molaritas ion   dari undefined diabaikan, pH tersebut adalah ...  

  1. 3 - log 2space space 

  2. 3 - log 4space space 

  3. 3 - log 8space space 

  4. 2 - log 4space space 

  5. 2 - log 8space space 

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Y. Rochmawatie

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Jawaban

jawaban yang benar adalah C.

jawaban yang benar adalah C.

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Jadi, jawaban yang benar adalah C.

 begin mathsize 14px style Keduanya space mempunyai space ion space yang space sama space yaitu comma space ion space S O subscript 4 to the power of 2 minus sign space end exponent. Kelarutan space Sr S O subscript 4 space dalam space H subscript 2 S O subscript 4 space adalah space 7 cross times 10 to the power of negative sign 5 end exponent comma space maka colon  Sr S O subscript 4 space left parenthesis italic s right parenthesis equilibrium Sr to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus S O subscript 4 to the power of 2 minus sign end exponent left parenthesis italic a italic q right parenthesis 7 cross times 10 to the power of negative sign 5 end exponent space space space space space space 7 cross times 10 to the power of negative sign 5 end exponent space space space space space 7 cross times 10 to the power of negative sign 5 end exponent H subscript 2 S O subscript 4 left parenthesis italic a italic q right parenthesis yields H to the power of plus sign left parenthesis italic a italic q right parenthesis plus S O subscript 4 to the power of 2 minus sign end exponent left parenthesis italic a italic q right parenthesis end style

 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell K subscript italic s italic p end subscript space Sr S O subscript 4 space end cell equals cell space open square brackets Sr to the power of 2 plus sign close square brackets left square bracket S O subscript 4 to the power of 2 minus sign end exponent right square bracket end cell row cell K subscript italic s italic p end subscript space Sr S O subscript 4 space end cell equals cell left parenthesis 7 cross times 10 to the power of negative sign 5 end exponent right parenthesis middle dot left square bracket S O subscript 4 to the power of 2 minus sign end exponent right square bracket end cell row cell 2 comma 8 space x space 10 to the power of negative sign 7 end exponent end cell equals cell left parenthesis 7 cross times 10 to the power of negative sign 5 end exponent right parenthesis middle dot left square bracket S O subscript 4 to the power of 2 minus sign end exponent right square bracket end cell row cell left square bracket S O subscript 4 to the power of 2 minus sign end exponent right square bracket space end cell equals cell space fraction numerator 2 comma 8 cross times 10 to the power of negative sign 7 end exponent over denominator 7 cross times 10 to the power of negative sign 5 end exponent end fraction end cell row cell left square bracket S O subscript 4 to the power of 2 minus sign end exponent right square bracket space end cell equals cell space 4 cross times 10 to the power of negative sign 3 end exponent space mol forward slash L end cell end table end style

 begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell molaritas space ion space S O subscript 4 to the power of 2 minus sign end exponent space dari space Sr S O subscript 4 space diabaikan space maka comma space end cell row blank blank blank row cell H subscript 2 S O subscript 4 left parenthesis italic a italic q right parenthesis end cell rightwards arrow cell 2 H to the power of plus sign left parenthesis italic a italic q right parenthesis plus S O subscript 4 to the power of 2 minus sign end exponent left parenthesis italic a italic q right parenthesis end cell row blank blank cell 4 cross times 10 to the power of negative sign 3 end exponent space space space space space space space space 8 cross times 10 to the power of negative sign 3 end exponent space space space 4 cross times 10 to the power of negative sign 3 end exponent end cell row blank blank blank row cell open square brackets H to the power of plus sign close square brackets space end cell equals cell 8 cross times 10 to the power of negative sign 3 end exponent end cell row pH equals cell negative sign log open square brackets H to the power of plus sign close square brackets end cell row bold pH bold equals cell bold space bold 3 bold minus sign bold log bold space bold 8 end cell end table end style
 

Jadi, jawaban yang benar adalah C.

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