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Hasil kali kelarutan  pada suhu tertentu . Bila ke...

Hasil kali kelarutan L open parentheses O H close parentheses subscript 2 pada suhu tertentu equals 1 comma 2 cross times 10 to the power of negative sign 11 end exponent. Bila ke dalam larutan LCl subscript 2 space 0 comma 2 space M ditambahkan Na O H padat, maka L open parentheses O H close parentheses subscript 2 mulai mengendap pada pH ...

Jawaban:

Hasil kali kelarutan ialah hasil kali konsentrasi ion- ion dari larutan jenuh garam yang sukar larut dalam air, setelah masing- masing dipangkatkan koefisien nya sesuai dengan persamaan reaksi ionisasinya.

table attributes columnalign right center left columnspacing 0px end attributes row cell LCl subscript 2 end cell rightwards arrow cell L to the power of 2 plus sign and 2 Cl to the power of minus sign end cell row cell open square brackets L to the power of 2 plus sign close square brackets end cell equals cell open square brackets LCl subscript 2 close square brackets equals 0 comma 2 space M end cell row blank blank blank row cell L open parentheses O H close parentheses subscript 2 end cell rightwards arrow cell L to the power of 2 plus sign and 2 O H to the power of minus sign end cell row Ksp equals cell open square brackets L to the power of 2 plus sign close square brackets open square brackets O H to the power of minus sign close square brackets squared end cell row cell 1 comma 2 cross times 10 to the power of negative sign 11 end exponent end cell equals cell left parenthesis 0 comma 2 right parenthesis left square bracket O H to the power of minus sign right square bracket squared end cell row cell left square bracket O H to the power of minus sign right square bracket squared end cell equals cell fraction numerator 1 comma 2 cross times 10 to the power of negative sign 11 end exponent over denominator 2 cross times 10 to the power of negative sign 1 end exponent end fraction end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of 6 cross times 10 to the power of negative sign 11 end exponent end root end cell row blank equals cell 2 comma 5 cross times 10 to the power of negative sign 5 comma 5 end exponent end cell row blank blank blank row pOH equals cell negative sign log space 2 comma 5 cross times 10 to the power of negative sign 5 comma 5 end exponent end cell row blank equals cell 5 comma 5 minus sign log space 2 comma 5 end cell row blank blank blank row pH equals cell 14 minus sign pOH end cell row blank equals cell 14 minus sign left parenthesis 5 comma 5 minus sign log space 2 comma 5 right parenthesis end cell row blank equals cell 8.5 plus log space 2 comma 5 end cell row blank equals cell 8 comma 5 plus 0 comma 4 end cell row blank equals cell 8 comma 9 end cell end table 

Jadi, L open parentheses O H close parentheses subscript 2 mulai mengendap pada pH 8,9.

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