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Pertanyaan

Jika hasil kali kelarutan CaCO 3 ​ = 2 , 5 × 1 0 − 9 dalam 250 mL air, massa CaCO 3 ​ yang melarut sebanyak ... ( A r ​ Ca = 40 , C = 12 , dan O = 16 )

Jika hasil kali kelarutan  dalam 250 mL air, massa  yang melarut sebanyak ... (space 

  1. 5 cross times 10 to the power of negative sign 5 end exponent space gspace 

  2. 0 comma 125 cross times 10 to the power of negative sign 3 end exponent space gspace 

  3. 1 comma 25 cross times 10 to the power of negative sign 3 end exponent space gspace 

  4. 2 comma 5 cross times 10 to the power of negative sign 3 end exponent space gspace 

  5. 5 cross times 10 to the power of negative sign 3 end exponent space gspace  

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L. Avicenna

Master Teacher

Mahasiswa/Alumni Institut Teknologi Bandung

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah C.

jawaban yang benar adalah C.space 

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Pembahasan

Menentukan kelarutan Misal kelarutan adalah s Menentukan massa Oleh karena itu, jawaban yang benar adalah C.

Menentukan kelarutan Ca C O subscript bold 3 

Misal kelarutan adalah s

table attributes columnalign right center left columnspacing 0px end attributes row cell Ca C O subscript 3 open parentheses italic s close parentheses end cell rightwards harpoon over leftwards harpoon cell Ca to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus C O subscript 3 to the power of 2 minus sign left parenthesis italic a italic q right parenthesis end cell row blank blank cell italic space italic space italic space italic space italic space italic space italic s italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic s italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic space italic s end cell row blank blank blank row cell K subscript sp end cell equals cell 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 end cell row cell K subscript sp end cell equals cell italic s cross times italic s end cell row cell K subscript italic sp end cell equals cell italic s squared end cell row italic s equals cell square root of K subscript sp end root end cell row s equals cell square root of 25 cross times 10 to the power of negative sign 10 end exponent end root end cell row s equals cell 5 cross times 10 to the power of negative sign 5 end exponent space M end cell end table 
 

Menentukan massa Ca C O subscript bold 3 

table attributes columnalign right center left columnspacing 0px end attributes row s equals cell n over V end cell row s equals cell g over M subscript r cross times 1 over V end cell row g equals cell s cross times M subscript r cross times V end cell row g equals cell 5 cross times 10 to the power of negative sign 5 end exponent space mol space L to the power of negative sign 1 end exponent cross times 100 space g space mol to the power of negative sign 1 end exponent cross times 0 comma 25 space L end cell row italic g bold equals cell bold 1 bold comma bold 25 bold cross times bold 10 to the power of bold minus sign bold 3 end exponent bold space bold gram end cell end table  

Oleh karena itu, jawaban yang benar adalah C.space 

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