9/3 – Friday “B” Day –
“The first day of class should connect to the last day and every day in between!”
1. To provide my goals to the class this year.
2. To introduce the course of Chemistry
3. To Convert between units of the metric System –
Standard 1, Key Idea, M1.1 – recognize and convert various scales of measurements length – Kilometer (km), meters (m), centimeters (cm), millimeters (mm)
1. Homework discussion
2. Whoosh Bottle demo – chemistry introduction
3. Class notes.
Unit 1 – Measurement and Calculations Notes – pgs 1 -10.pdf
1. Metric units – conversion lesson.
a) Model a few conversions using factor label method (dimensional analysis) and chart method.
b) Students practice individually
metric conversions 1 .pdf
2. Lab Safety – sign contract and have a parent sign a copy and turn in for a 100 quiz grade. Safety feature of the room and basic rules of engagement. We did not get to the Lab safety today. Next week!
3. Play the safety video (from 1950’s) –
Accidental Explosions – circa 1950’s :
Whoosh bottle Demo Notes:
Once the I have the alcohol in the gas phase, which has now mixed with the oxygen in the air inside the container I ignite the flammable mixture by providing a spark and the combustion reaction begins. This is an example of an spontaneous reaction that releases energy exothermically, (exergonic reaction). Here is the chemical change that takes place:
2CH3OH(l) + 3O2(g) →. 2CO2(g) + 4H2O(g) + Energy Alcohol Oxygen carbon dioxide water
Why is oxygen needed??