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Larutan amoniak 0,4 Mmemiliki pH = 11 + log 2. Berapa pH larutan 0,1 M NH 4 ​ Br ....

Larutan amoniak 0,4 M memiliki pH = 11 + log 2. Berapa pH larutan 0,1 M  ....

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Jawaban terverifikasi

Jawaban

maka jawaban yang tepat adalah 5.

maka jawaban yang tepat adalah 5.

Pembahasan

Dengan demikian, maka jawaban yang tepat adalah 5.

begin mathsize 14px style pOH space equals 14 minus sign pH pOH equals 14 minus sign open parentheses 11 plus log space 2 close parentheses pOH equals 3 minus sign log space 2  open square brackets O H to the power of minus sign close square brackets equals 10 to the power of negative sign pOH end exponent open square brackets O H to the power of minus sign close square brackets equals 2 cross times 10 to the power of negative sign 3 end exponent space M  open square brackets O H to the power of minus sign close square brackets equals square root of K subscript b cross times open square brackets N H subscript 3 close square brackets end root 2 cross times 10 to the power of negative sign 3 end exponent space M equals square root of K subscript b cross times open parentheses 0 comma 4 close parentheses end root K subscript b equals 10 to the power of negative sign 5 end exponent end style

begin mathsize 14px style open square brackets H to the power of plus sign close square brackets equals square root of K subscript italic w over K subscript italic b cross times open square brackets N H subscript 4 to the power of plus close square brackets end root open square brackets H to the power of plus sign close square brackets equals square root of 10 to the power of negative sign 14 end exponent over 10 to the power of negative sign 5 end exponent cross times 0 comma 1 end root open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 5 end exponent  pH space equals space minus sign log open square brackets H to the power of plus sign close square brackets pH equals 5 end style

Dengan demikian, maka jawaban yang tepat adalah 5.

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