Reference Materials for Life Science 11

Thursday, 18 May 2017

Chemistry 11

Today we did the TRU chem contest........challenging!

Next we had some time to work on the Concentration Assignment followed by a short movie on elements in the periodic table.

Selected answers to the Concentration Assignment below:   (make sure you show all your work!)

1) 0.315 M         2) 285 mL     3d) 0.0447 moles of Fe+3   
                                                                    0.067 moles of SO4-2


4d) (NH4)2S ------- 2NH4+  +   S-2

6) [Cl-] = 0.160 M             7) Final concentration of Na2S = 0.72 M

9) When you mix the two solutions together, you must first find the NEW concentration of solution 1 and solutions 2 and then add them together Total LiF after mixing = 0.394 M 

10)  [Cl]=0.774 M