Name__________________ TA_________________

1). While reviewing your calculations, you realize that your percent recoveries add up to be more than 100%. List the most likely places where errors may have occurred.

2). Use the information to answer the following questions

Soluble In:

	Cold Water	Hot Water	3M HCl	3M NaOH
Benzoic Acid	No	Yes	No	Yes
Mg(OH)2	No	No	Yes	No
Na2SO4	Yes	Yes	Yes	Yes
Zn(OH)2	No	No	Yes	Yes

A). Could you separate the components of a mixture of Mg(OH)2 and Zn(OH)2 by using 3M HCl.

B). Briefly describe how you could separate the components of a mixture of benzoic acid and Na2SO4 and recover the two separate substances.

3). Name two potential hazards associated with this lab.