11/24/15 - 3/4 C1H - LAB: Empirical Formula

NOTE:  AP Lab ran over time so we completed practice with formula writing and some additional assignments.


Today's Agenda

Learning Goal

1. Determine the percent composition of a compound given:
1. chemical formula
2. experimental data
2. Determine an empirical formula from 
1. percent composition 
2. experimental data
3. Determine a molecular formula using the empirical formula of a compound and its formula mass.

Activities

1. Bell Ringer
1. Homework - check with a partner.  How is it going?
2. Grab a calculator.
3. You will need pencil, paper, periodic table, ion sheet...
2. Activities
1. Housekeeping
2. LAB - Emp Formula (time permitting)
1. We will not use exposed film.
2. Which balances are the centigram balances? Use those and share.
3. We will NOT use a crucible lid.
4. YOU MUST have a blue flame and a GREAT set up today to get this to work.
3. Post -Lab - See GC for instructions and post.

Prepare for the Next Class

1. Be ready for lab