west valley high school chemistry mr. button 941-6287 347-7171 ex. 31204 [email protected]...
TRANSCRIPT
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Everyday Requirements
You must bring a notebook with you everyday, starting today
You must bring a pen/pencil with you everyday, starting today
Bring your text everyday unless you are told otherwise
Keys for Chemistry Success
Read the text when it’s assigned……then read some more
Take notes during lecture and content review
Read
Ask questions, especially about the labs and exams
Complete all assignments
Get to a good start by turning in everything and staying organized
Behavior during Labs
Be careful
If you break something, immediately report it to Mr. Button
If it was an accident, no fee
This isn’t free time – it’s time to accomplish tasks
All students must participate
The Metric System in Chemistry
Things we will be measuring during the first lab:LengthTimeVolumeMassDensityTemperature
Length
Not often used in chemistry but useful to practiceA measurement of the distance between 2 pointsStandard unit of measure is the meter (m)Other useful units are the millimeter, centimeter and
the kilometerMilli = 1/1000Centi = 1/100Kilo = 1000
Time
A measurement of the interval between 2 separate events (tough to define)
The standard unit of measure is the second
Other useful units are milliseconds and minutes.
Unit Conversion
These types of calculations are done frequently in ChemistryGoing from meters to millimetersGoing from days to seconds
Example
Mass
A measurement of the amount of matter in an object
The standard unit of mass is the gram.
Other useful units are the milligram and the kilogram
A scale is used to measure mass
Volume
A measurement of the amount of space an object occupies.
The standard unit of volume is the liter.
Another useful unit is the milliliter.
There are different ways to measure volume. You can measure it using length measurements or by using devices like a graduated cylinder
Volume
Important ideasA milliliter is the same thing as a cubic centimeter. In
other words, if an object has a volume of 12 cubic centimeters it also has a volume of 12 milliliters.
1 milliliter of water has a mass of 1.0 gram (at 4.0o Celsius)
Density
A measurement of an object’s mass as it relates to its volume.
In other words, a liter of gold is much heavier than a liter of water because gold has a greater density than that of water.
The standard unit is grams/milliliters or grams/cubic centimeters.
Density
The density of water is 1.0 grams/mL or 1.0 grams/cm3
If an object’s density is greater than 1, it will sink in water
If an object’s density is less than 1, it will float on water
Temperature
A measurement of the amount of heat energy in an object.
The standard unit is degrees Celsius
Water freezes at 0oC.
Water boils at 100oC.
What do I turn in?
Everyone will turn in a lab report. This consists of 6 parts. They are:
1. Introduction – One or two sentences that describe what you will be doing in the lab.
2. Materials – a list of materials and equipment that you will use during the lab.
Lab Report3. Procedure – this is a guide to how you made your
measurements during the lab. It’s like a recipe another student could follow in order to get the same results as you did.
You only need to write the procedure for the following items:
Part 1 - #4, #6, #8
Part 2 - #3, #8, #10
Part 3 - #3, #9, #10
Lab Report
4. Data – these are all your answers for the measurements you had to make.
It is best to present this in table form
Part 1 Measurement Answers
#1
#2
#3
#10
Lab Report5. Data Analysis – these are calculations you made
during the lab (you made a lot in this one)
You only have to show your calculations for the same items as the procedure:
Part 1 - #4, #6, #8
Part 2 - #3, #8, #10
Part 3 - #3, #9, #10
Lab Report
6. Conclusions – this part includes things you discovered during the lab. It also may include specific answers to questions I will give you. In this lab, all you have to do is write a sentence or 2 describing something you learned.