Unit 1 Test for Chemistry / Physical Science. Contains lab safety, metric system measurements, metric system conversions using dimensional analysis, and accuracy/precision.
Directions:
Be precise with your measurements.
Use correct capitalization for abbreviations when needed.
You should include a unit if it is not given!
Fully explain yourself on the free response questions.
You may use a calculator and the metric conversion chart. Raise your hand and let me know if you have any questions as you are working.
Match the lab equipment name with the correct picture.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Graduated Cylinder | arrow_right_alt |
|
Well Plate | arrow_right_alt |
|
Weight Boat | arrow_right_alt |
|
Pipet | arrow_right_alt |
|
Scale / Balance | arrow_right_alt |
|
Beaker | arrow_right_alt |
|
A student needs to measure out 25.4 mL of water for a lab experiment. What is the best piece of lab glassware to complete this task?
Read the scenario below, then answer the questions:
A student needs to measure out 5.0g of salt for a step in a lab experiment. The student obtains a weigh boat, a digital scale, and scoopula. The student turns on the scale, places the weigh boat on the scale, then uses the scoopula to measure out the 5.0g of salt.
In the scenario, the student made an error. Identify the error(s) in this student's lab procedure. Explain why this step was not done properly and what should have been done instead.
Read the story below, then answer the questions:
Maria was absent the day before a lab. Instead of taking the time to read through the procedure first, she watched her neighbors to find out what to do.
What lab safety error(s) did Maria commit?
Explain why her errors could be dangerous in the lab:
A lab test was performed to find the concentration of hydrochloric acid (HCl).
Here are the results:
Trial 1 = 2.03 M
Trial 2 = 1.98 M
Trial 3 = 2.06 M
The actual true concentration of HCl was found to be 2.00 M.
The results were ...
Match the type of measurement to the base unit:
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Mass | arrow_right_alt | Meters |
Length | arrow_right_alt | Liters |
Volume | arrow_right_alt | Grams |
dL is the correct abbreviation for .
The correct abbreviation for hectograms is
The length of the black line is
The length of the black line is
Draw a line/rectangle that has a length of 9.2 centimeters.
Draw a line/rectangle that has a length of 6.0 millimeters.
The volume of liquid shown in this image is
Draw the meniscus at 42.0 mL.
Draw the meniscus at 6.5 mL.
63,000 grams is 6.3 kilograms.
Write the conversion factor that compares dekameters and millimeters:
Show your work to solve the following metric conversion:
Convert 2.8 dekameters to millimeters
Write the conversion factor that compares centigrams and kilograms:
Show your work to solve the following metric conversion:
Convert 762.4 centigrams to kilograms
