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Kelarutan Ag2CrO4 dalam air adalah 1,07 x 10^-4 mol/liter. Berdasarkan itu harga Ksp Ag2CrO4 adalah …

Kelarutan Ag2CrO4 dalam air adalah 1,07 x 10^-4 mol/liter. Berdasarkan itu harga Ksp Ag2CrO4 adalah …
A. 4,9 x 10^-12
B. 9 x 10^-12
C. 0,9 x 10^-11
D. 6,75 x 10^-11
E. 4,5 x 10^-11

Jawaban benar adalah

Simak penjelasan di bawah ini ya.

Kelarutan (s) adalah jumlah maksimum zat terlarut yang dapat larut dalam pelarut. Sedangkan Ksp adalah hasil kali kelarutan ion-ion yang masing-masing dipangkatkan koefisien reaksi dalam larutan yang jenuh pada suhu tertentu.

Ag₂CrO₄ (s) ⇄ 2Ag⁺ (aq) + CrO₄²⁻ (aq)

Ksp = [Ag⁺]² [CrO₄²⁻] Ksp = (2 s)² x s
Ksp = 4s³
Ksp = 4 (1,07 x 10⁻⁴)³
Ksp = 4,9 x 10⁻¹²

Jadi, harga Ksp Ag2CrO4 adalah 4,9 x 10⁻¹².

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