West Valley High School Chemistry Mr. Button ex danbutton.net

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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: Length Time Volume Mass Density Temperature

Length Not often used in chemistry but useful to practice A measurement of the distance between 2 points Standard unit of measure is the meter (m) Other useful units are the millimeter, centimeter and the kilometer Milli = 1/1000 Centi = 1/100 Kilo = 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 Chemistry Going from meters to millimeters Going 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 ideas A 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 4.0 o 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/cm 3 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 0 o C. Water boils at 100 o C.

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 Report 3. 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 1Measurement Answers #1 #2 #3 #10

Lab Report 5. 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.