Tuesday, September 1st

Review for the Chapter 3 exam on Thursday. Below are the answers for the two AP Chemistry Test problems that we are using for review.

2008 Free Response

2a) We will discuss in class.

2bi) 1.848 g H2O-->0.1026 mol H2O

2bii) 1.630 g MgCl2-->0.01712 mol MgCl2

Empirical formula of the hydrate: (0.1026/0.01712)=5.993-->6 H2O
MgCl2*6H2O

2c) We will discuss in class.

2d) We will discuss in class.

2e) 5.48 g AgCl-->0.0191 mol MgCl2

2f) 0.0191 mol MgCl2-->1.82 g MgCl2-->61.1% MgCl2 by mass in the mixture

2005 Free Response

2ai) 0.5202 g C; 0.03771 g H; 0.1970 g O

2aii) Empirical Formula: (C3.5H3O)*2-->C7H6O2

2bii) Molar Mass = 122 g/mol

2c) We will discuss in class.