1.0cm3 0.25mol dm3 potassium chromate(VI), K,Cro, is added as an indicator. 4 At the end-point, all the silver chloride has been precipitated in the 52.5 cm3 solution. A slight excess of silver idis causes a red-brown precipitate of silver chromate(VI) to form. 2Ag*(aq) + CrO,2-(aq) → Ag,Cro,(s) (i) The solubility product of silver chloride is: Kp = 2.0 x 10-10 mol? dm-6 %3D Use this value to explain why [Ag*] = 1.41 x 10 5 mol dm-3 at the end-point.
1.0cm3 0.25mol dm3 potassium chromate(VI), K,Cro, is added as an indicator. 4 At the end-point, all the silver chloride has been precipitated in the 52.5 cm3 solution. A slight excess of silver idis causes a red-brown precipitate of silver chromate(VI) to form. 2Ag*(aq) + CrO,2-(aq) → Ag,Cro,(s) (i) The solubility product of silver chloride is: Kp = 2.0 x 10-10 mol? dm-6 %3D Use this value to explain why [Ag*] = 1.41 x 10 5 mol dm-3 at the end-point.
Chapter9: Aqueous Solutions And Chemical Equilibria
Section: Chapter Questions
Problem 9.8QAP
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(c) 1.0cm^3 0.25 moldm^-3 potassium chromate(VI), K2CrO4, is added as an indicator.
At the end-point, all the silver chloride has been precipitated in the 52.5cm^3 solution. A slight excess of silver ions causes a red-brown precipitate of silver chromate(VI) to form.
2Ag + (aq) + CrO4 2- (aq) - - > Ag2CrO4 (s)
(i) The solubility product of silver chloride is:
Ksp = 2.0 ×10^-10 mol^2 dm^-6
Use this value to explain why [Ag+] = 1.41 × 10^-5 moldm^-3 at the end point.
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