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Perhatikan gambar reaksi pengenceran larutan asam ...

Perhatikan gambar reaksi pengenceran larutan asam kuat berikut :
 
Besarnya pH asam kuat diatas setelah diencerkan sebanyak 10 kali adalah ....

  1. 1- log 1space 

  2. 2 - log 5space 

  3. 2 - log 1space 

  4. 3- log 5space 

  5. 3 - log 1space 

Jawaban:

begin mathsize 14px style n subscript H subscript 2 S O subscript 4 end subscript equals 0 comma 05 cross times 100 equals 5 space mmol H subscript 2 S O subscript 4 yields 2 H to the power of plus sign and S O subscript 4 to the power of 2 minus sign end exponent n subscript H to the power of plus sign end subscript equals 2 cross times n subscript H subscript 2 S O subscript 4 end subscript equals 10 space mmol open square brackets H to the power of plus sign close square brackets equals bevelled 10 over 100 equals 0 comma 1 space M  Jika space V subscript 2 equals 10 V subscript 1 comma space maka open square brackets H to the power of plus sign close square brackets subscript 1 cross times V subscript 1 equals open square brackets H to the power of plus sign close square brackets subscript 2 cross times V subscript 2 0 comma 1 cross times V subscript 1 equals open square brackets H to the power of plus sign close square brackets subscript 2 cross times 10 V subscript 1 open square brackets H to the power of plus sign close square brackets subscript 2 equals 0 comma 01 space M  pH equals minus sign log open square brackets H to the power of plus sign close square brackets pH equals minus sign log open parentheses 0 comma 01 close parentheses pH equals 2 end style

Dengan demikian, maka jawaban yang tepat adalah C.

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