Pertanyaan

Larutan 100 mLNH 3 0,8 M dicampur dengan 100 mL HCl 0,8 M, menurut reaksi: Harga pH larutan tersebut adalah..

Larutan 100 mL NH₃ 0,8 M dicampur dengan 100 mL HCl 0,8 M, menurut reaksi:

Harga pH larutan tersebut adalah..

5 - log 2
5 + log 2
9 - log 2
9 + log 2
12 + log 2

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Pembahasan

$space space space space space space space space space space space space space space space space space space space space N H subscript 3 space space space space space space space plus space space space space space H C l space space space space space space rightwards arrow space space space space space N H subscript 4 C l M u l a space space space space space space space 80 space m m o l space space space space space space space space space space 80 space m m o l R e a k s i space space minus 80 space m m o l space space space space space space minus space 80 space m m o l space space space space plus space 80 space m m o l S i s a space space space space space space space space 0 space space space space space space space space space space space space space space space space space space space space space space space 0 space space space space space space space space space space space space space space space space space space space space space space space 80 space m m o l left square bracket N H subscript 4 C l right square bracket space equals space fraction numerator m o l over denominator V space t o t a l end fraction space equals space fraction numerator 0 comma 08 space m o l over denominator 0 comma 2 space L end fraction space equals space 0 comma 4 space N H subscript 4 C l space m e r u p a k a n space g a r a m space a s a m comma space s e h i n g g a space colon left square bracket H to the power of plus right square bracket space equals space square root of fraction numerator K w space x space left square bracket g a r a m right square bracket over denominator K b end fraction end root space equals space square root of fraction numerator 10 to the power of negative 14 end exponent space x space left square bracket 0 comma 4 right square bracket over denominator 10 to the power of negative 5 end exponent end fraction end root space equals space square root of 4 space x space 10 to the power of negative 10 end exponent end root space equals space 2 space x space 10 to the power of negative 5 end exponent space M p H space equals space minus space log space 2 space x space 10 to the power of negative 5 end exponent space equals space 5 space minus space log space 2$

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