Answer to Question #334426 in General Chemistry for lam

Question

1. The 0.0005 mol/l K3[Fe(CN)6] solution was used for determination of a coagulation threshold of a sol. The minimal amount of the solution required for the coagulation of 9 ml of the sol was found to be 1 ml. Calculate the coagulation threshold of the sol.

Answer 1

С_с = (C_el. * V_el.*1000)/ (V_sol.*V_el.)

С_с = (0.0005 mol/l * 1 ml * 1000) / (9 ml  + 1 ml) = 0.05 mol