Diketahui campuran larutan penyangga sebagai berikut : Urutan harga pH mulai dari yang terkecil ke yang lebih besar adalah .... (tulis angkanya, contoh : 1,2,3)

Pertanyaan

Diketahui campuran larutan penyangga sebagai berikut :

Urutan harga pH mulai dari yang terkecil ke yang lebih besar adalah .... (tulis angkanya, contoh : 1,2,3)

  1. ...space 

  2. ...space 

R. Anisa

Master Teacher

Mahasiswa/Alumni Universitas Negeri Semarang

Jawaban terverifikasi

Jawaban

urutan pH dari terkecil ke terbesar yaitu 3, 1, dan 2.

Pembahasan

Campuran 1:

n space C H subscript 3 C O O H double bond M point V space space space space space space space space space space space space space space space space space space space space equals 0 comma 1 space M point 50 space ml space space space space space space space space space space space space space space space space space space space space equals 5 space mmol n space C H subscript 3 C O O Na double bond M point V space space space space space space space space space space space space space space space space space space space space space space equals 0 comma 1 space M point 50 space ml space space space space space space space space space space space space space space space space space space space space space space equals 5 space mmol n space C H subscript 3 C O O to the power of minus sign double bond n space C H subscript 3 C O O Na equals 5 space mmol open square brackets H to the power of plus sign close square brackets double bond K subscript a point fraction numerator n space C H subscript 3 C O O H over denominator n space C H subscript 3 C O O to the power of minus sign end fraction space space space space space space equals 10 to the power of negative sign 5 end exponent. fraction numerator 5 space mmol over denominator 5 space mmol end fraction space space space space space space equals 10 to the power of negative sign 5 end exponent space M pH equals minus sign log open square brackets H to the power of plus sign close square brackets space space space space equals minus sign log left parenthesis 10 to the power of negative sign 5 end exponent right parenthesis space space space space equals 5 

pH campuran 1 adalah 5.

Campuran 2:

n space C H subscript 3 C O O H double bond M point V space space space space space space space space space space space space space space space space space space space equals 0 comma 1 space M point 50 space ml space space space space space space space space space space space space space space space space space space space equals 5 space mmol n space C H subscript 3 C O O Na double bond M point V space space space space space space space space space space space space space space space space space space space space space space equals 0 comma 1 space M point 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 equals 10 space mmol n space C H subscript 3 C O O to the power of minus sign double bond n space C H subscript 3 C O O Na equals 10 space mmol open square brackets H to the power of plus sign close square brackets double bond K subscript a point fraction numerator n space C H subscript 3 C O O H over denominator n space C H subscript 3 C O O to the power of minus sign end fraction space space space space space space equals 10 to the power of negative sign 5 end exponent. fraction numerator 5 space mmol over denominator 10 space mmol end fraction space space space space space space equals 5.10 to the power of negative sign 6 end exponent space M pH equals minus sign log left parenthesis 5.10 to the power of negative sign 6 end exponent right parenthesis space space space space equals 6 minus sign log space 5 

pH campuran 2 adalah 6 - log 5.

Campuran 3:

n space H C N double bond M point V space space space space space space space space space space equals 0 comma 2 space M point 50 space ml space space space space space space space space space space equals 10 space mmol n space K C N double bond M point V space space space space space space space space space space equals 0 comma 1 space M point 50 space ml space space space space space space space space space space equals 5 space mmol n space C N to the power of minus sign double bond n space K C N equals 5 space mmol open square brackets H to the power of plus sign close square brackets double bond K subscript a point fraction numerator n space H C N over denominator n space C N to the power of minus sign end fraction space space space space space space space equals 2.10 to the power of negative sign 5 end exponent. fraction numerator 10 space mmol over denominator 5 space mmol end fraction space space space space space space space equals 4.10 to the power of negative sign 5 end exponent pH equals minus sign log open square brackets H to the power of plus sign close square brackets space space space space equals minus sign log left parenthesis 4.10 to the power of negative sign 5 end exponent right parenthesis space space space space equals 5 minus sign log space 4 

pH campuran 3 adalah 5 - log 4.

Jadi, urutan pH dari terkecil ke terbesar yaitu 3, 1, dan 2.

734

4.8 (6 rating)

Pertanyaan serupa

Jika 50 mL larutan CH3​COOH 0,1 M dicampurkan dengan 100 mL CH3​COONa 0,2 M (Ka​ CH3​COOH=1,8×10−5), maka pH campuran adalah ...

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Jawaban terverifikasi

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