Lab Safety
Draw the health hazard symbol.
State the difference between a law and a theory.
A law is what happens, a theory is why something happens.
Draw a graduated cylinder and state the use.
It is used for precisely measuring liquids.
How many significant figures are in 7.00?
3
How many significant figures are in 0.089?
2
Name 2 lab safety rules that have to do with attire.
Hair tied back, no long sleeves, no flip flops, need to wear goggles.
Give an example of a qualitative analysis and a quantitative analysis.
Qualitative: The sky is blue.
Quantitative: My desk is 34 inches tall.
What is a pipet used for?
Moving small amounts of liquids.
The 2 in 1203.87 is in what place?
The hundreds place.
Your _____ measurement can’t be better than your ________ measurement.
Your FINAL measurement can’t be better than your WORST measurement.
Draw the corrosive hazard symbol.
Symbol with two test tubes being spilled on desk and hands.
What is an inference?
Conclusion or explanation based on evidence, reasoning, or past observations.
Draw a volumetric flask and an erlenmeyer flask. Which one is more precise?
The volumetric flask is more precise and has a graduated neck.
Convert 0.000075 into scientific notation.
7.5 x 10-5
Convert 5.2x10-4 into standard notation.
0.00052.
What is a SDS? What are 3 things that could be found on one?
It is a Safety Data Sheet. What to do if the substance is inhaled, ingested, in your eyes or on your skin, the hazard symbols, and the density.
List and define the 4 parts of the experimental design. (IV, DV, Control, and Constants)
Independent Variable (IV) - what I change
Dependent Variable (DV) - what changes because of the IV
Control - baseline for comparison
Constants - stays the same throughout
Piece of equipment used for titrations and delivers accurate amounts of liquids.
Buret
Draw a meniscus on a graduated cylinder and label where on the meniscus you would read at.
Draw a dart board that represents accuracy ONLY.
_________ should never be added to ________.
Water should never be added to acid.
Write the 7 steps of the scientific method in order.
1. Ask question/state problem
2. Gather background information
3. Hypothesis
4. Experiment
5. Record Data
6. Analyze Data
7. Conclusion
Correctly draw an evaporating dish, a crucible with lid, and a mortar and pestle.
Drawing is on the board.
Find the percent error if the experimental value is 16 and the actual value is 19.
15.79%
Take the average of 22, 4, 35, 7, and 17.
17