Roboguru

Dicampurkan 0,1 mol  dengan 0,1 mol  dan 0,1 mol  dalam 2 L air, pH larutan campuran adalah ...

Pertanyaan

Dicampurkan 0,1 mol begin mathsize 14px style C H subscript 3 C O O H space left parenthesis K subscript a equals 10 to the power of negative sign 5 end exponent right parenthesis end style dengan 0,1 mol begin mathsize 14px style C H subscript 3 C O O Na end style dan 0,1 mol begin mathsize 14px style open parentheses C H subscript 3 C O O close parentheses subscript 2 Ba end style dalam 2 L air, pH larutan campuran adalah ...space 

Pembahasan Soal:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell mol space asam space end cell equals cell 10 to the power of negative sign 1 end exponent space mol end cell row cell mol space garam end cell equals cell mol space C H 3 C O O H and mol space open parentheses C H subscript 3 C O O close parentheses subscript 2 space end cell row cell Ba space mol space garam end cell equals cell 10 to the power of negative sign 1 end exponent space mol plus 2 cross times 10 to the power of negative sign 1 end exponent space mol end cell row cell mol space garam end cell equals cell 3 cross times 10 to the power of negative sign 1 end exponent space mol end cell row blank blank blank row cell H to the power of plus sign end cell equals cell K subscript a cross times fraction numerator mol space asam over denominator mol space garam end fraction end cell row cell H to the power of plus sign end cell equals cell 10 to the power of negative sign 5 end exponent cross times fraction numerator 10 to the power of negative sign 1 end exponent space mol over denominator 3 cross times 10 to the power of negative sign 1 end exponent space mol end fraction end cell row cell H to the power of plus sign end cell equals cell 3 comma 3 cross times 10 to the power of negative sign 6 end exponent space M end cell row blank blank blank row pH equals cell negative sign log space open square brackets H to the power of plus sign close square brackets end cell row pH equals cell negative sign log space left square bracket 3 comma 3 cross times 10 to the power of negative sign 6 end exponent space M right square bracket end cell row pH equals cell 6 minus sign log space 3 comma 3 end cell end table end style   

Jadi pH campuran tersebut adalah begin mathsize 14px style bold 6 bold minus sign bold log bold space bold 3 bold comma bold 3 end style.space 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 12 April 2021

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