IPS Quiz #1

Lab Safety

1. Test the odors of liquids by _________ them under your nose.


odors

2. If something spills or breaks the first thing you should do is _______.

notify Mr. Leeds

3. You should wash your hands with ____________ after handling all chemicals.

soap and water

4. Never use ________ to remove or insert glass.

force

5. Before leaving class, your lab area must be completely ______.

clean

6. Capping the alchohol burner puts out the flame because fire needs ________.

oxygen

7. What is the extension for the nurse?

2828

True or False:

1. You should report all accidents to Mr. Leeds at the end of class. False

2. You should never throw broken glass into the regular trash. True

3. If you get any chemicals on your skin you should flush your skin with water and tell Mr. Leeds true

4. You can take off your goggles as soon as you finish the lab. false

5. Hot glass looks different from cold glass. false

6. It is okay to use a cracked test tube as long as you are careful. false

7. The Emergency Blanket is used if someone really needs to take a nap. False

8. It is okay to put your goggles up on your forehead when you clean up. False


1. List three important safety tips when working with an alcohol burner

be careful when picking up the beaker, be sure to cap it when you're finished, never leave a burner.


2. List three safety precautions you should take when using chemicals.

tell the teacher if it gets on you, don't waft solids or powders, don't eat any chemicals.


3. List three pieces of safety equipment located in the classroom.

Fire extinguisher, fire blanket, eyewash station


Reaction in a Bag Lab

1. What is phenol red used as? a Ph indicator

2. What does the Ph scale do? measures acidity

3. What does the Ph scale go to? 0-14 (zero= acid 7= neutral 14= alkaline)

4. What does hydrotropic mean? Attracted to water/ absorbs water

5. What does exothermic mean? When a reaction makes it hot.

6. What does endothermic mean? When a reaction makes it cold.

7. What is an experimental error for this? Hole in the bag (wouldn't know a gas is produced).

8. Why is a gas produced? The chemical reaction.

Heating Baking Soda Lab

1. Where did the gas come from? heating the b. soda


2. Where did the condensation come from? hot gas touching the cooler top of the tube, turns back into a liquid.

Part 2:


1. What was the control group? Unheated t.tube

2. What was the experimental group? Heated t.tube

3. What was the indicator? the tea

4. Name two experimental errors.

-rubber stopper not all the way on tight, hole in rubber tubing

B.Ds and B.Qs

1. The bottom of the test tube was a brown color.

2. I saw condensation at the top of the test tube.

3. In the inverted bottle, the water level is going down.

4. I think the gas came from heating the baking soda.

5. The test tube that was heated is cloudy and a dark orange color; the new test tube is clear and a light orange color.

6. They are no longer the same substance. The heated one changed.

7. Baking soda is used in baking because when heated, it releases a gas that causes things (dough, batter) to rise.




Balance Notes

1. Check that pan is clean and dry


2. Always "zero" balance before each massing (push all riders to zero and use knob if necessary)


3. NEVER switch pans


4. Pick up balance by red bar only


5. Don't zero balance when done.

Volume Notes

1. The unit of measurement is centimeters cubed



2. Volume is length x width x height


3. The standard unit of length is meters


4. One cm = .01 m


5. A unit cube is a small cube 1 cm on each edge


Volume of Liquids:


1. Use a graduated cylinder to measure volume.


2. Units = milliliters or cm cubed.


3. Read from the bottom of the meniscus.




Graduated cylinders:


1. What are the divisions on a:

10 mL? .2 mL

25 mL? .5 mL

50 mL? 1 mL

100 mL? 1 mL