Chemistry Lab #4
2C – One in a Million
Lab Book Page 28
MasterBlaster info - 300
Job Assignments
A reader
B aprons
C cleanup
D cleanup
All record
Periods 1-3, do not unplug master blasters.
Period 4, unplug and wrap with velcro
Page 28 Pre Lab is due tomorrow
Work in class today.
Page 1
I. Intro
V. Procedures (We will do parts 1-6)
Page 1
VI. Draw out table 1 and 2 – use rulers to
make it neat!
If you finish before the bell, check in for check.
Study for Quiz on Elements 21-60.
Page 297,298,300
• See above pages in your Lab Book for Master
Blaster (Lab Master) use.
• We’ll be using the Spectrophotometer to
“read” the amount of light that is absorbed by
the color present in the solutions.
• Skip calculations until after you follow
directions in part 3 on page 30 after reading
the above pages.
Soln. R G
1 0.99 3.75
2 0.16 2.60
3 0.03 0.81
4 0.00 0.03
B
3.76
2.55
1.02
0.15
VIII Calculations
Conc = volume of substance x 100
total volume
Soln #1: 1ml food color x 100 = 10%
10 mL solution
Soln #2: 1mL Soln #1 x 10 = 1.0%
10 mL solution
Soln #3: 1mL Soln #2 x 1.0 = 0.10%
10 mL solution
Parts Per Million (PPM)
Concentration in PPM = Conc. X 1,000,000
SO:
PPM = 0.10 x 1,000,000 = 100,000 ppm
With prior calculations, complete the tables
before you hand in your reports.
Actual Write up – Due on
Monday 9/30
Page 1 – IV Data - completed data tables
Page 2
VII. Graphs (graph your data on copies I have for you –
don’t write in the book & I have RGB markers for you)
Page 3
VIII. Calculations – DO NOT do calculations until you
have collected all data!!! See page 29 for calcs.
Last Page
IX. Discussion – Answer Parts 4 & 5 here.
X. Conclusion