1. Monday, 10/24/2011 Writing Assignment for HOMEWORK
You will use two previous assignments to help with the homework writing:
#31 from Unit 1 Separation of a Mixture Lab
#1 from Unit 2 Separation of a Mixture Procedures Writing
On a sheet of paper –
Write your name, date, and period # at the top
Title the assignment Procedures Writing #2
In the upper righthand corner, number the page U38 and circle the page number

2. Procedures Writing #2
Using the Separation of a Mixture Lab and the Lab Procedures Writing from 09/12, you will write the Procedures section of a lab report.
The Procedures section of a lab report is one well-developed paragraph that includes the following:
Safety procedures followed
Supplies and materials used
Steps followed to conduct the experiment
WRITE CONCISELY, OBJECTIVELY, PASSIVELY, and in PAST TENSE
Tell what was done, NOT what to do

3. Sample Lab Report Procedures
Standard laboratory safety precautions apply to flame test experiments. Goggles and aprons were worn throughout the flame test, and appropriate care was taken when lighting and using the Bunsen burner. Care was also taken to avoid igniting the cotton swabs. The metals tested were dissolved in solution, and six known solutions were available for testing: lithium chloride (LiCl), sodium chloride (NaCl), potassium chloride (KCl), calcium chloride (CaCl), copper (II) chloride (CuCl2), and strontium chloride (SrCl2). Necessary materials and equipment also included a Bunsen burner with rubber tubing and access to natural gas, matches, eight (8) to ten (10) cotton swabs, film canisters containing the known solutions, and a film canister containing the unknown solution. Four different unknown solutions were available for testing. The Bunsen burner was attached to the gas valve, lit, and adjusted to produce a hot, blue cone of flame. One end of a clean cotton swab was dipped in the first known solution until saturated and then was placed in the hottest part of the burner flame. The color of the flame was observed and recorded in the data table. The description of the color was recorded as accurately as possible in order to distinguish results for the known solutions. These steps were repeated for each of the known solutions, using a clean cotton swab, and then repeated for the unknown solution(s).