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Hitunglah massa CaCO 3 ​ ( M r ​ = 100 ) maksimum yang dapat larut di dalam 500 mL larutan Ca ( NO 3 ​ ) 2 ​ 0 , 050 M . Diketahui K sp ​ CaCO 3 ​ = 5 × 1 0 − 9 .

Hitunglah massa   maksimum yang dapat larut di dalam  larutan . Diketahui .

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Y. Rochmawatie

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massa maksimum yang dapat larut adalah

massa begin mathsize 14px style Ca C O subscript 3 end style maksimum yang dapat larut adalah begin mathsize 14px style 5 cross times 10 to the power of negative sign 6 end exponent space g end styleundefined

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Dengan demikian, massa maksimum yang dapat larut adalah

begin mathsize 14px style K subscript sp Ca C O subscript 3 equals open square brackets Ca to the power of 2 plus sign close square brackets open square brackets C O subscript 3 to the power of 2 minus sign close square brackets 5 cross times 10 to the power of negative sign 9 end exponent equals open parentheses 0 comma 050 close parentheses open square brackets C O subscript 3 to the power of 2 minus sign close square brackets open square brackets C O subscript 3 to the power of 2 minus sign close square brackets equals fraction numerator 5 cross times 10 to the power of negative sign 9 end exponent over denominator 5 cross times 10 to the power of negative sign 2 end exponent end fraction open square brackets C O subscript 3 to the power of 2 minus sign close square brackets equals 10 to the power of negative sign 7 end exponent space M   open square brackets C O subscript 3 to the power of 2 minus sign close square brackets equals open square brackets Ca C O subscript 3 close square brackets 10 to the power of negative sign 7 end exponent space M equals fraction numerator m subscript Ca C O subscript 3 end subscript over denominator Mr space Ca C O blank presubscript 3 end fraction cross times 1000 over V 10 to the power of negative sign 7 end exponent space M equals fraction numerator m subscript Ca C O subscript 3 end subscript over denominator 100 space g space mol to the power of negative sign 1 end exponent end fraction cross times fraction numerator 1000 over denominator 500 space mL end fraction m subscript Ca C O subscript 3 end subscript equals 5 cross times 10 to the power of negative sign 6 end exponent space g end style 


Dengan demikian, massa begin mathsize 14px style Ca C O subscript 3 end style maksimum yang dapat larut adalah begin mathsize 14px style 5 cross times 10 to the power of negative sign 6 end exponent space g end styleundefined

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