1. What would happen if:

a. not enough K2CO3 was used?





b. too much HCl was used?






2. Using Table 1 of lab #375, could you separate a mixture of CaSO4, Ca(NO3)2, and NaCl?







3. Liquid Chromatography is a separation technique in which a solution flows through a fixed substrate. The different chemicals in the solution interact with the substrate to varying degrees. Basically, one chemical may cling to the substrate longer than another. So, one moves faster through the substrate and eventually the chemicals separate. Is this a physical or a chemical separation technique? Explain.







4. Using the table in question 2 of the Post-Laboratory Questions of Lab 375 (in the packet), how could you separate all four components using cold water, 3M HCl and 3M NaOH.







5. You are all done with your lab. There is just one problem: the total mass of the recovered samples is more than the original mass. What happened?