YOUR NAME

This is an individual quiz; closed book and notes!

1. (20 pts) Fill in the blank spaces in the following chart.
   You will lose a point for having wrong number of significant figures.

   Item	Weight	Moles	Millimoles	Daltons
   Mg	19.20 grams (4 sig figs)	0.7897 or 7.897x10-1	789.7	24.312
   NaIO4	277.0	1.295	1,295 (4 sig figs)	213.89
   Penicillin G	1x102 grams (1 sig fig)	0.1 or 1x10-1	1x102	909.12

   
   
   

2. (10 pts) In lab, you found that by adding equal amounts of 3 M HCl and 3 M NaOH together, the temperature rose 19.1°C. Suppose you added equal amounts of 3M HCl and 2M NaOH, how much of a temperature rise should be expected?
   
   2M NaOH will neutralize only 2M of the HCl leaving the remainder of the HCl unreacted. Thus our answer should be 2/3 of the 19.1°C = 12.7°C rise.