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

  1. Identify Problem
  2. Gather Info
  3. Form Hypothesis/theory
  4. perform experiment
  5. analyze data
  6. conclusion

Reaction in a bag

Safety

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

safety:

wear goggles,

put up long hair

roll up long sleeves


  1. 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

1. From where, do you think, did the gas come?

when heated, it releases a gas which helps things rise


Box Questions p.8 #s 3-7

3. How many cubic centimeters of water are required to fill a graduated cylinder at the 50.0 ml mark?

50 cm3