To obtain a precipitate which is useful for gravimetric analysis, the analyst tries to obtain conditions to encourage crystal growth, as opposed to the formation of a colloid. Which of the following statements aids in the formation of a crystalline precipitate and the formation of a colloidal precipitate?
To obtain a precipitate which is useful for gravimetric analysis, the analyst tries to obtain conditions to encourage crystal growth, as opposed to the formation of a colloid. Which of the following statements aids in the formation of a crystalline precipitate and the formation of a colloidal precipitate?
(a) The solution is kept in room temperature during the precipitation of the analyte to slow down the movement of ions to allow crystals to form. ___________
(b) The solutions are mixed rapidly with the aid of a stirring rod to allow the appropriate ions to make contact without interference of other materials._____________
(c) The addition of large amount of the precipitating agent at the center of the solution without stirring the analyte solution. _______________
(d) The analyst selects the precipitate of the analyte with the Ksp less than 1 x 10 -15
______________
(e) The analyte solution and the precipitating reagents are mixed together at a near boiling temperature. _______________
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