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Harga . Jika konsentrasi ion  saat tepat jenuh ada...

Harga begin mathsize 14px style K subscript italic s italic p end subscript space Mg F subscript 2 space adalah space 1 cross times 10 to the power of negative sign 7 end exponent end style. Jika konsentrasi ion begin mathsize 14px style F to the power of minus sign end style saat tepat jenuh adalah begin mathsize 14px style 2 cross times 10 to the power of negative sign 3 end exponent space M end style,  konsentrasi ion begin mathsize 14px style Mg to the power of 2 plus sign end style adalah ...undefined 

  1. begin mathsize 14px style 0 comma 02 end style undefined 

  2. begin mathsize 14px style 0 comma 025 end style undefined 

  3. begin mathsize 14px style 0 comma 030 end style undefined 

  4. begin mathsize 14px style 0 comma 035 end style undefined 

  5. begin mathsize 14px style 0 comma 04 end style undefined 

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell K subscript sp space Mg F subscript 2 end cell equals cell open square brackets Mg to the power of 2 plus sign close square brackets open square brackets F to the power of minus sign close square brackets squared end cell row cell 10 to the power of negative sign 7 end exponent end cell equals cell open square brackets Mg to the power of 2 plus sign close square brackets open square brackets 2 cross times 10 to the power of negative sign 3 end exponent space M close square brackets squared end cell row cell 10 to the power of negative sign 7 end exponent end cell equals cell open square brackets Mg to the power of 2 plus sign close square brackets open square brackets 4 cross times 10 to the power of negative sign 6 end exponent space M close square brackets end cell row cell open square brackets Mg to the power of 2 plus sign close square brackets end cell equals cell fraction numerator 10 to the power of negative sign 7 end exponent space over denominator 4 cross times 10 to the power of negative sign 6 end exponent space end fraction end cell row cell open square brackets Mg to the power of 2 plus sign close square brackets end cell equals cell 0 comma 025 space M end cell end table end style 

Jadi konstentrasi ion magnesium adalah 0,025 M.

Oleh karena itu, jawaban yang benar adalah B.undefined 

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