Question

1. Prepare a written plan for making up 100.0 ml of 0.100 M KI solution. (Note the list of reagents and equipment provided in the background information). Include in your plan the exact amount of KI that you will need and the actual 2. Prepare a written plan for making up 100.0 ml of a solution that is 0.100M in Ca2 ion using 2.00 M CaCl2 2H2O solution. steps that you will take to prepare the solution. This plan should be drawn up on your own; your instructor will go over it with you before you proceed in the laboratory.

Answer 1

o volume = 100ml = 100 L=10.1. looo Molarity = Only kit solution. » Chemical → KI - Molecular weight of KI = 166 g/mod :: Tor OlM KI solution, - Number of moles required = Let (2) be the the (Molarity & Volume) amount of KI = (0.1 x 0.1) required / taken. = Cool mole (0.01) mole No. of moles = Ratstatan Molar mase 0.01 = x 166 X = (166 X 0.01) = (1.667 . Amount of kI required = 11.66g (Ans ) No. Opta Mars taken

② Volume = 100 mL = 100 L 1000 = (0.1) L Molarity = 0.1M Caat required Considering complete dissouation of cach- 240 - Cack-2420 - cant + 2 ct + 2420. so, f a number of more of Cast formed is the same as call-2420. .: Required molarity of caht = (0.174 in (100ml of Solutions : Let the volume of 2M Cach.2420 solution be (v) Litres. Using - M, V = M2 Vz] » 10.18 0.1) = ax V ? v= (0.01) = (0.0052)

Weel Yr.: 20 # audinb: # # Sun : volume of QM Call, 240 required to prepare 100 ml of 0.1M Cast = 0.005 L = 15 mL Ans.