I.P.S Quiz #1 Study Guide

1.1-1.4, Safety, Reaction In a Bag

Safety Information

-For Every Lab-


  • Goggles must be kept over your eyes until Mr. Leeds says to put them away even if you have finished and cleaned up
  • Report all accidents/spills to Mr. Leeds immediately.
  • Please try to use common sense


-In Case of Emergency-


  • Nurse Extension: 2828


-Safety Equipment



  • Fire Extinguisher
  • Fire Blanket
  • Eye Wash/Shower



-Chemicals-


  • Never taste chemicals
  • Always waft liquid to detect the odor
  • Never waft solids/powders
  • Avoid touching chemicals
  • Always wash hands with soap and water after lab
  • If chemicals touch skin: flush skin with water for one minute and notify Mr. Leeds



-Glass-


  • Hot/Cold glass look the same
  • Never use chipped or broken glass
  • Tell Mr. Leeds and dispose of the broken glass in the proper trash
  • Never use force to insert or remove glass


-Alcohol Burners-


  • Roll up sleeves, put up long hair, not just pull back
  • Never walk away from a lit burner
  • Never point the open end of a hot test tube at you 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 Lab-


  • Clean up area & materials completely
  • Make certain that burner is out if one was used
  • Keep goggles on until Mr. Leeds says to put them away





Reaction in a Bag

-Experimental Error-



  • If there was a hole in the bag, we would not know that a gas has been produced.



-Red Liquid-


  • Phenol Red
  • Used as a PH indicator
  • Below 7, color turns yellow
  • Above 8, color turns pink



-PH Scale-


  • measures acidity
  • goes from 0-14, 7 being neutral
  • 0-6: Acid
  • 8-14: Alkaline/Base
  • Lemon Juice PH: 1.5
  • Tums PH: 10


-The 2 Solids-


  • Calcium Chloride
  • Acidic
  • Hydro-tropic- attracted to water (absorbs water)
  • Uses: canned vegetables (keeps them from getting mushy), electrolytes in sports drinks, flavors pickles (salty)
  • Sodium Bicarbonate (Baking Soda)
  • not acidic (PH=8.4)
  • uses: baking, laundry detergent, toothpaste



Heating Baking Soda

Terms:

  • Control Group- Unheated Test Tube
  • Experimental Group- Heated Test Tube
  • Indicator- Tea (indicates heated baking soda has changed)
  • Variable- something you try to measure
  • Independent/Dependent Variable
  • Independent- something that affects the dependent variable
  • Independent- temperature was affected
  • Dependent- color of the tea



  • Control Factors
  • same type of tea
  • same amount of baking soda
  • same amount of tea
  • same stirring time
  • same size/shape test tube


Experimental Errors:

  • Hole in tubing- we will not know if a gas has been produced
  • If stopper is not snug, bottle will not fill with gas
  • Stirring rod not cleaned before you begin


Box Question #1:


  1. Why do you think baking soda is used in baking? When heated, it releases a gas which helps dough/batter to rise.


Lab 1.1 Heating Baking Soda

1.2: Volume

  • Unite of measurement: cm3
  • Volume Formula: lwh
  • Standard unit of length: meter
  • 1 cm= 0.01 m
  • 100 cm= 1 m


-Volume of Liquids-


  • use a graduated cylinder to measure volume
  • always check the interval or scale
  • units= ml or cm3
  • read from bottom of the meniscus


Box Questions 3-8 Answer Key (PG. 8)


  1. 50 cm3
  2. Box A has a larger space inside, and Box B is narrower.
  3. 7 cm3
  4. 8 cubes, 27 cubes, 8 cm3 and 27 cm3, a- 8 cm3 and b- 12 cm3
  5. The second box has the larger volume.
  6. As the surface increases, the depth decreases.






Box Questions 9-13 Answer Key (PG 11-12)

  1. 1.2 and 3.8 (cm3), 1.65 & 2.50 & 4.50 (cm3), The arrows are sometimes in between the tenths marks so that in turn is the easiest way to measure.
  2. A= 0.1 cm3, B= 0.2 cm3
  3. A= 4.0 cm3, B= 1.3 cm3
  4. 12: 11.5 & 12.4 (cm3), 12.0: 11.95 & 12.04 (cm3), 12.00: 11.995 & 12.004 (cm3)
  5. The lines are farther apart because less surface is equal to more depth and it is easier to read.