Pertanyaan

Ke dalam 100 mL larutan CH 3 COOH 0,2 M (Ka = 1 x 10 -5 ) ditambahkan 100 mL larutan NaOH 0,2 M sehingga terjadi reaksi: CH 3 COOH (aq) + NaOH (aq) → CH 3 COONa (aq) + H 2 O (l) Harga pH larutan yang terjadi sebesar …. (Kw = 10 -14 )

Ke dalam 100 mL larutan CH₃COOH 0,2 M (Ka = 1 x 10^-5) ditambahkan 100 mL larutan NaOH 0,2 M sehingga terjadi reaksi:

CH₃COOH (aq) + NaOH (aq) $\to$ CH₃COONa (aq) + H₂O (l)

Harga pH larutan yang terjadi sebesar …. (Kw = 10^-14)

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Jawaban terverifikasi

Pembahasan

$CH subscript 3 COOH space left parenthesis aq right parenthesis space plus space NaOH space left parenthesis aq right parenthesis space rightwards arrow CH subscript 3 COONa space left parenthesis aq right parenthesis space plus space straight H subscript 2 straight O space left parenthesis calligraphic l right parenthesis 0 comma 2 space straight M space space space space space space space space space space space space space space space space space space space space space space space space space space 0 comma 2 space straight M 100 space mL space space space space space space space space space space space space space space space space space space space space space space 100 space mL Ditanya space colon space harga space pH space larutan space yang space terjadi ? CH subscript 3 COOH space left parenthesis aq right parenthesis space plus space NaOH space left parenthesis aq right parenthesis space rightwards arrow CH subscript 3 COONa space left parenthesis aq right parenthesis space plus space straight H subscript 2 straight O space left parenthesis calligraphic l right parenthesis 0 comma 2 Mx 100 mL space space space space space space space space space 0 comma 2 Mx 100 mL straight M equals 20 space mmol space space space space space space space space space space equals space 20 space mmol space space space space space space space space space space space space space space space minus space space space space space space space space space space space space space space space space space space space space space space space minus straight R equals 20 space mmol space space space space space space space space space space space equals space 20 space mmol space space space space space space space space space space 20 space mmol space space space space space space space space space space space space space space 20 space mmol top enclose straight S equals space space space space space space space minus space space space space space space space space space space space space space space space space space space space space space space space space space space space space space minus space space space space space space space space space space space space space space space 20 space mmol space space space space space space space space space space space space space space space 20 space mmol end enclose Molaritas space garam space equals space fraction numerator m m o l italic space g a r a m over denominator v o l u m e italic space t o t a l end fraction italic equals fraction numerator italic 20 italic space m m o l over denominator italic 200 italic space m L end fraction equals space 0 comma 1 space straight M space space Karena space semua space reaktan space habis comma space berarti space merupakan space campuran space hidrolisis. space Hidrolisis space dilihat space dari space sifat space yang space kuat comma space di space sini space yang space kuat space adalah space NaOH left parenthesis basa right parenthesis. Rumus space Hidrolisis space untuk space Garam space basa colon space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space left square bracket OH to the power of minus right square bracket equals square root of fraction numerator K w italic space x italic space M o l a r i t a s italic space G a r a m italic space x italic space v a l e n s i over denominator Ka end fraction end root space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space left square bracket OH to the power of minus right square bracket equals square root of fraction numerator 10 to the power of negative 14 end exponent italic space x italic space 0 comma 1 space straight M italic space x italic space 1 over denominator 10 to the power of negative 5 end exponent end fraction end root space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space left square bracket OH to the power of minus right square bracket equals square root of 10 to the power of negative 10 end exponent end root space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space left square bracket OH to the power of minus right square bracket equals 10 to the power of negative 5 end exponent space space space space space pOH space equals space minus space log left square bracket OH to the power of minus right square bracket space equals space minus log left square bracket 10 to the power of negative 5 end exponent right square bracket space equals space 5 pH space plus space pOH space equals space 14 pH space equals space 14 space minus space pOH pH space equals space 14 space minus space left parenthesis 5 right parenthesis space equals space 9 space$

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