1. Welcome Chemistry I – Day 4
Portland Evening Scholars
Mr. Treothe Bullock - Instructor

Introduction to Chemistry – Unit 1
Exam
 Review of Objectives
 Exam

Candle Lab & Accuracy vs.
Precision Labs Due

SI metric conversions Practice &
Lab
 First page of conversions out
and ready to be signed
 2nd & 3rd page will be for
proficiency

Science Math Marathon
 Exponents
 Scientific Notation
 Significant Figures
 Dimensional Analysis

Chemistry Paper – Writing Lab –
last 45 min
 Element Reports – share –
you will need info from
multiple families and countries
of origin (discovery)
 Template on Website
 bullockchem.wordpress.com

2. Homework
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Complete Chemistry Math Practice
Complete Chapter 2 Review
Complete Write up of Water Density Lab
Complete Rough Draft of Unknown Inquiry
Write up

Include Class Data and % error calculations

3. Element Notes

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Set up section in your binder to take notes during
Element reports. Take notes on the following.
Name & Symbol
Elemental Family
When, where and by whom was it discovered.
Where is it most commonly found.
How it is used.
Anything else you think is important to know.

4. Density of Unknown Metal
Your Name
Density of Metal

Add your name and density for
the unknown metal

Calculate an average density
for the class

As soon as all data is in
density for common metals will
be given and you will predict
the metal.

5. Density of Common Metals
Based on class Data which metal could our unknown be?
metal
g/cm3
lb/gal lb/in
water
1.00
0.036
62
Aluminum 2.70 0.098
169
zinc
7.13
0.258
445
iron
7.87
0.284
491
copper 8.96
0.324
559
silver
10.49
0.379
655
lead
11.36
0.410
709
Mercury 13.55
0.490
846
gold
19.32
0.698
1206
lb/ft
8.35
22.53
59.50
65.68
74.78
87.54
94.80
113.08
161.23

6. Calculate Your percentage error
for the unknown metal Density
Accepted value – Actual value
 ________________________ X 100 = PercentError

Accepted Value

Sample for Water – Accepted 1.00g/ml Experimental
0.98 g/ml

1.00 g/ml - 0.98 g/ml /1.00 g/ml x 100 = 2% error

7. Calculate Your percentage error
for the unknown metal Density
Accepted value – Actual value
 ________________________ X 100 = PercentError

Accepted Value

Sample for Water – Accepted 1.00g/ml Experimental
0.98 g/ml

1.00 g/ml - 0.98 g/ml /1.00 g/ml x 100 = 2% error