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Hitunglah pH larutan  0,01 M !

Pertanyaan

Hitunglah pH larutan begin mathsize 14px style N H subscript 4 O H end style 0,01 M begin mathsize 14px style open parentheses K subscript b space N H subscript 4 O H equals 2 cross times 10 to the power of negative sign 5 end exponent close parentheses end style!undefined 

Pembahasan Soal:

Perhitungan mencari pH larutan basa lemah adalah sebagai berikut:


 begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open square brackets O H to the power of minus sign close square brackets equals square root of K subscript b cross times M subscript b end root equals square root of 2 cross times 10 to the power of negative sign 5 end exponent cross times 0 comma 01 end root equals square root of 2 cross times 10 to the power of negative sign 7 end exponent end root equals 1 comma 4 cross times 10 to the power of negative sign 3 comma 5 end exponent end cell row blank blank blank row blank blank cell pOH equals minus sign log space open square brackets O H to the power of minus sign close square brackets equals minus sign log space 1 comma 4 cross times 10 to the power of negative sign 3 comma 5 end exponent equals 3 comma 5 minus sign log space 1 comma 4 equals 3 comma 5 minus sign 0 comma 15 equals 3 comma 35 end cell row blank blank blank row blank blank cell pH equals 14 minus sign pOH equals 14 minus sign 3 comma 35 equals 10 comma 65 end cell end table end style    


Jadi, pH  larutan begin mathsize 14px style N H subscript 4 O H end style 0,01 M sebesar 10,65.undefined 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 12 Maret 2021

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