Question

Please do 2(b) and 3. I attached data sheet and procedure

Lab 11 Separating and Recovering the components of a Temary Mixture Interpretation of Your Results use the spaces provided for the answers and additional ppm ifmocessary. 1. In Step 16 of the Procedure a you separated solid sio, by decanting the supernatant liquid. Provide an alternative method for this separation. (b) you washed the solid three times. Briefly explain why three washings were used. 2. If your total percent recovery is not 100%, speculate which ofthe components was the most difficult toseparate and recover. Briefly explain. (b) explain any discrepancies between your two determinations.

Answer 1

2(b) Yes, threre can be discrepancies between our two determinations. As during the preparation of mixture for separation we make two separate beakers of volume 150 ml and then transfer a 2.50 to 3.00 gram of ternary mixture into each beaker. This variation in the amount of ternary mixture that lie with in a range of 2.50 - 3.00 g causes the discrepancies in our two determinations. (3) The assigned mixture of 5.00 g is prepared on the basis of the mass percentage of components in our sample as follows consider for long mixture, % Nacl = 53.1 % % sio_2 = 31.8 % % CaCo_3 = 100 - (84.9) = 15.1 % Thus, for 5.00 g mixture, Nacl amount in mixture = 5 times 53.1/100 = 2.66 g Sio_2 amount in mixture = 5 times 31.8/100 = 1.59 g CaCo_3 amount in mixture = 0.75 g Therefore, for preparing 5 gram of assigned mixture we mix 2.66 g of Nacl, 1.59 g of Sio_2 and 0.75 g of CaCo_3