Zat pembersih lantai kamar mandi mengandung asam klorida sebagai asam kuat yang sering dimanfaatkan untuk membersihkan kotoran membandel. Asam ini bersifat korosif. Bila dalam kemasan zat pembersih tersebut bertuliskan kandungan HCl 0,2 M, maka tentukanlah derajat keasaman (pH) dari asam tersebut!

Zat pembersih lantai kamar mandi mengandung asam klorida sebagai asam kuat yang sering dimanfaatkan untuk membersihkan kotoran membandel. Asam ini bersifat korosif. Bila dalam kemasan zat pembersih tersebut bertuliskan kandungan HCl 0,2 M, maka tentukanlah derajat keasaman (pH) dari asam tersebut!

Jawaban : pH dari asam klorida adalah 0,69

Asam adalah senyawa yang melepaskan ion hidrogen. Asam klorida merupakan salah satu contoh dari asam kuat. Yang memiliki jumlah ion hidrogen ( valensi asam satu).

HCl →H⁺ + Cl⁻ , valensi asam (a) = 1

Menentukan pH asam kuat
[H⁺]= M x a
= 0,2 M x 1
= 2 x 10⁻¹M

pH = – log [H⁺] = – log 2 x 10⁻¹
= 1 – log 2
= 0,69

Jadi, pH dari asam klorida adalah 0,69.

Rekomendasi lainnya :

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