I.P.S. First Quiz Study Guide

Lab Safety....Volume....Labs

Lab Safety

Goggles must be kept OVER YOUR EYES until Mr. Leeds says to put them away

**even if you are already finished and cleaned up**

Report ALL accidents/spills to Mr. Leeds immediately

Try your best to use common sense


In Case of Emergency

Nurse: ext: 2828


Safety equipment in classroom

Fire extinguisher

Fire blanket

Eye wash/shower


Chemicals

Never taste chemicals (even if they look yummy!)

Always waft liquids to detect odor

NEVER WAFT SOLIDS/POWDERS!

Avoid touching chemicals

Always wash hands with soap and water after lab

If chemicals touch skin: flush with water for 1 minute AND notify Mr. Leeds


Glass

Hot glass and cold glass look the same

Never use chipped or broken glass

-tell Mr. Leeds and dispose of broken glass in proper trash

Never use force to remove or insert glass


Alcohol Burners

Roll up sleeves, put UP long hair, NOT just pull back (or u cannot do lab)

Never walk away from a lit burner

Never point the open end of a hot test tube at yourself or someone else

Do not look down into a test tube/beaker while it is being heated

Make sure burner is capped and flame is out when done


End of Experiment

CLEAN-UP AREA & MATERIALS COMPLETELY!!!! (or you LOSE points)

Make certain that burner is out if one was used

Keep goggles on (over eyes) until Mr. Leeds says to put them away.



Reaction in a bag - Lab

Purpose: To record the observations that occur when multiple chemical substances are combined and to use our observations to understand the reaction of the chemicals.


Procedure:

Observe and record appearance of Solids A&B in data table.

Waft red liquid and record odor in data table

Lay opened plastic bag flat on table

Put 1 spoonful of Solid A into corner of bag

Put 1/2 spoonful of Solid B into corner of bag

Keeping bag flat, pour 5mL of red liquid into bag

Seal bag TIGHT and mix substances

Observe and touch bag (where red mixture is)


Materials:

  • Substances A&B
  • Red liquid
  • 2 spoons
  • Graduated cylinder
  • Water


Lab Safety

-wear goggles -wear aprons



Heating Baking Soda

Purpose:

To observe and record the reaction that occurs when baking soda is heated.

II. Procedure:

Part A

1. Put about 0.5 centimeters of baking soda in a dry test tube.

2. Fill plastic container up to mid-line.

3. Fill bottle with water and hold hand over mouth of bottle as you invert it.

4. Insert tubing into bottle.

5. Put stopper into test tube.

6. Have Mr. Leeds check set up.

7. Light burner.

8. Answer blue dot questions numbers 1-3.

9. When reaction ends remove tubing THEN cap flame.

Part B

1. Put 0.5 centimeters of baking soda into another test tube.

2. Pour tea into both test tubes. (¼ filled).

3. Stir both test tubes. *(wipe off stirring rod b/w test tubes).

4. Compare the color of test tubes.

5. Clean-up.

III. Materials:

1. Two test tubes

2. Baking soda

3. Water

4. Plastic bottle

5. Plastic container

6. Tubing

7. Stopper

8. Glass bend

9. Matches

10. Tea

11. Rubber band

12. Stirring rod

13. Peg board

14. Clamp

15. Burner

IV. Lab Safety: -wear goggles -wear apron –put up hair –roll up sleeves

Blue Dot Questions

1. Nothing happened at the bottom of the test tube.

2. The top of the test tube started to fog up.

3. The water was being forced out of the bottle and into the container.

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

5. I think the droplets came from the gas condensing.

6. The liquid in the tube that was not heated is more transparent than the liquid in the tube that was heated.

7. The baking soda dissolved in the heated tube more than the baking soda in the tube that was not heated.

Volume Notes

-Unit of Measurement: cubic centimeters

-Volume = l x w x h

-standard unit of length = meter (m)

1 centimeter (1cm) = .01 m

100 cm = 1 m

Unit cube >r< 1 cubic centimeter

-a small cube is 1cm on each edge

Volume of Liquids

-use a graduated cylinder to measure volume

*ALWAYS check the intervals or scale

units = millimeters (mL) 1mL = 1 cubic centimeter

-Read from bottom of meniscus