IPS Exam Study Guide
Lab Safety
FOR EVERY LAB
wear goggles until Mr. Leeds tells you to take them off
Report ALL accidents/spills to Mr. Leeds immediately
always 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
- always WAFT liquids to detect order
- 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
Glass
- hot glass and cold glass look the same
- never used chipped or broken glass
- never use force to remove or insert glass
Alcohol Burners
- roll up sleeves, put UP long hair NOT just pull back (or you cannot do lab)
- never walk away from a lit burner
- never point to 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
Diluting Acid
- Acid must be added to water
- never add water to acid
could cause an exothermic reaction
water is less dense (lighter) than acid so it will sit on top of acid and could splash out
End of Experiment
- make sure burner is capped and flame is out
- CLEAN UP AREA AND MATERIALS COMPLETELY!!!!
Scientific Method
- Identify Problem
- Gather Info
- Form Hypothesis/theory
- perform experiment
- analyze data
- conclusion
Reaction in a bag
wear goggles, open bag away from people
Data
- solids a and b together form no reaction
- the two liquids together have no reaction
Solid A and Red Liquid
gets hot, turns pink, solid not dissolved
Solid B and Red Liquid
gets cold, turns pink, solid not dissolved
Solid A and Water
cloudy color, gets hot, solid dissolved
Solid B and Water
milky color, solid didn't dissolve, stays water temperature
Solids A, B and Water
foamy, produces a gas, gets hot and cold, solid dissolved.
Heating Baking SOda
wear goggles,
put up long hair
roll up long sleeves
- Is the amount of condensation that forms at the top of the heated test tube more or less than the amount of baking soda being heated?
Less (possibly equal) because condensation comes from baking soda and it cannot produce more than itself
2. control group: unheated baking soda/tea
3. experimental group: heated baking soda/tea
4. control factors: same amount of tea/baking soda, same size test tube, same stirring time, same tea
Baking Soda: Sodium Bicarbonate
Experimental Errors:
- stirring rod contaminated
- small hole in tubing
- rubber band breaks
- stopper not fully on
Box Questions P. 5
when heated, it releases a gas which helps things rise
Box Questions p.8 #s 3-7
50 cm3