IPS Exam Study Guide
For every lab:
-Goggles must be kept ON YOUR FACE until Mr. Leeds says to put them away
-Report ALL accidents/spills to Mr. Leeds immediately
-Always use common sense
In Case of Emergency:
-Nurse: ext: 2828
Safety equipment in classroom
-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
**Flush skin with water if contact with chemicals occurs** AND notify Mr. Leeds
-Hot glass and cold glass look the same
-Never use chipped or broken glass
-Never use force to remove or insert glass
-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
-Acid must be added to water.
-Never add water to acid.
End of Experiment
-Make sure burner is capped and flame is out
-CLEAN-UP AREA & MATERIALS COMPLETELY!!!! (Or you LOSE points)
2. Gather information
3. Form hypothesis and theory.
4. Perform the experiment.
5. Analyze the data.
Reaction in a Bag Lab
Purpose: To record observations that occur when substances are combined
1. Put solid A in a corner of the bag. and solid B in another corner.
2. Add red liquid and seal bag while mixing substances.
Orange-yellow color, foamy, warm, soapy and a gas is produced and the bag expands
Baking Soda Lab
1. Add baking soda to the test tube.
2. Fill the container with water and invert the filled bottle into the container and place a rubber band around it.
3. Insert the rubber tubing all the way to the bottle of the bottle.
4. Heat the baking soda and watch the reaction.
5. Record observations and once the test tube is cooled down, add tea to both test tubes. Watch the observations.
6. Compare the colors of the test tubes.
Observations: (when heated)
air hole gets bigger, baking soda is burned and turns black, all the water goes into the inverted bottle, test tube gets foggy and condensation occurs in the test tube and glass bend
Volume of a Rock Lab
1. Use funnel to pour the sand into the yellow cylinder.
2. Fill clear cylinder with water and pour sand into water with the funnel.
3. Record volume of the sand and water using the level of water.
Sensitivity of a Balance
1. Clean/zero the balance
2. Mass penny and rubber stopper four times
3. Read accurately and record
4. Compare the results with your lab partner
The Mass of Dissolved Salt
1. Clean/dry/zero the balance
2. Mass the cap and add 2 grams to the balance
3. Add salt to cap until balanced
4. Fill bottle 2/3 with water and mass the bottle with water, cap and salt together but NOT mixed
5. Pour salt into bottle
6. Shake the bottle until all salt is dissolved
7. Mass bottle and cap on
The Mass of Ice and Water Lab
1. Dry/clean/zero the balance
2. Put an ice cube in the small container and put the lid on the container
3. Mass the container with the ice and after the ice melts, mass it again
Condensation comes from the warm water vapor touching the cold surface of the bottle; it changes from gas to a liquid
The Mass of Copper and Sulfur
1. Mass test tube, sheet and band together
2. Mass 2 g. of copper and 1 g. of sulfur
- mass paper towel and add 1 g. to the towel
- add sulfur until it is balanced
3. Put sheet and band on the test tube
4. Mass test tube unheated
5. Light burner and observe
6. Cap flame, mass test tube and clean up
When lit, the copper melted and the sulfur turned to a gas.
The Mass of a Gas
1. Fill bottle 1/3 with water
2. Mass bottle, cap and tablet
3. Put the tablet in the bottle and shut the bottle
4. Mass the bottle
5. Open the bottle and mass again
The alka-seltzer (sodium bicarbonate from the baking soda) releases a gas
Properties of Substances/Objects
Property of substance: identify what the object is made of
Mass and Volume
1. Use water displacement method to find the volume of each long cylinder
2. Mass the three long cylinders and the short aluminum cylinder
3. Mass the brass cylinder
Density of Solids Lab
1. Clean/zero the balance
2. Mass the cubes and compare the mass of each cube with the mass of the slab
3. Measure the dimensions of each of the three objects
4. Mass the slab and calculate the volume and density
5. Use water displacement method to find the volume of the stone
6. Find the density of the rock and compare answers
The rock has different densities because it is formed by many substances being compressed together. Different substances=different densities
Density of Liquids
1. Zero/clean the pan
2. Waft liquid
3. Mass empty graduated cylinder
4. Fill the graduated cylinder with 10 cm3 of liquid
5. Mass the grad. cylinder with the liquid and then pour the graduated cylinder into the sink
Density of a Gas
1. Break the tablet in half
2. Put 5 cm3 of water in the test tube
3. Mass the test tube with the water, foil, tablet, and rubber band
4. Find the volume of the bottle
5. Fill the bottle and empty into graduated cylinder
6. Set up
7. Put tablet in test tube, insert stopper and tubing
8. Remove tubing/stopper/inverted bottle when reaction ends
9. Find volume of the water left in the bottle
10. Mass the test tube, water, foil and rubber band
11. Calculate the density of the gas
Gas is carbon dioxide; it comes from the sodium bicarbonate in the alka-seltzer