IPS Exam Study Guide

This Contains Tests and Labs Only

Know It

  • Lab Safety
  • All the way to 3.8


Lab Safety

  • Nurse phone extension: 2828
  • Waft all liquids.
  • Never use chipped glass.
  • Hot and cold glass look the same...
Fire Safety:
  • Roll up sleeves when using burners.
  • Never walk away from a lit burner.
  • Never point open end of a hot test tube at yourself or someone else.
  • Do not look into a test tube/beaker while it is being heated.
  • Make sure burner is capped and flame is out when done.


Scholar Reaction In The Bag Inquiry Demonstration and Lab Activity

Reaction In A Bag Lab

Red Liquid
  • Phenol Red - Used as a PH indicator
  • Substances with PH number below seven turn pink
  • Substances with PH number over 8 turn yellow
  • PH scale: 0-6 is acidic, 7 is neutral, 8-14 is basic / alkaline
Solid A
  • Calcium Chloride (Calcium + Chlorine)
  • Mildly Acidic
  • It is Hydrotropic - Attracted to water and absorbs water.
  • Used in canned vegetables to help them stay fresh, used as an electrolyte in sports drinks, and it is used to flavor pickles.
Solid B
  • Sodium Bicarbonate (Baking Soda)
  • Not acidic (Basic)
  • Used in baking, toothpaste, laundry detergent, and cat litter.


Chapter 1

Lab 1.1 Heating Baking Soda

Lab 1.1: Heating Baking Soda

  • The gas in the inverted bottle came from the heated baking soda.
  • The condensation comes from the hot vapor/gas touching the cooler top of the test tube. This turns the vapor/gas back into a liquid.
  • The heated beaker is usually darker.
  • The two substances are not the same. If they were the same, the color of the two test tubes would be the same.
  • Control Group - Unheated test tube
  • Experimental Group - Heated test tube
  • Indicator - Tea. It shows you that the heated test tube isn't baking soda.
  • Variable - Something you try to measure.
  • Independent Variable - Temperature
  • Dependent Variable - Color of the tea
  • Control Factors - Same type of tea, same amount of tea, baking soda, temperature, stirring time, test tube size.


Lab 1-4 Measuring Volume By Displacement

Lab 1.4: Measuring Voume by Displacement of Water

To find the volume of sand alone
  • Volume of sand and water minus (-) volume of water

To find volume of air space

  • Volume of dry sand and air minus (-) Volume of sand alone

To find the fraction of sand that is air

  • Air divided by (/) dry sand


Lab 1.8: The Sensitivity of a Balance

  • Delta (∆) means change
  • ∆M is the change in mass
  • ∆V is change in volume
To find the sensitivity of the balance
  • ∆M divided by (/) # of yes's

To find the # of yes's

  • Add up the # of times the mass of your object changed when it was massed repeatedly

To find ∆M

  • Initial Mass (Mi) minus (-) Final Mass (Mf)


CH.1 TEST

  • Know volume of sand and of boxes calculations
  • Know sensitivity of balance formula
  • Groups are given different amounts of sand to show that no matter how much sand there is there will still be about 40% of air space in the sand.
  • Write units
  • Round to proper place volume
  • To find out if students made mistakes in their massings when you are given a chart, check the range (biggest #-smallest #) of the masses. If the range is bigger than the sensitivity of the balance, someone made a mistake.
  • The sensitivity of our balances is 0-.02
  • Know all errors




Chapter 2

Lab 2.1: Mass of Dissolved Salt

  • When salt dissolves, the mass decreases.
  • In this case, salt in a solid form weighs more than liquid salt.


Will melting ice cause water level to rise?

Lab 2.4: Ice Ice Baby

  • Condensation on the bottle comes from the warm water vapor in the air (this is humidity).
  • When the water vapor touched the cool surface on the bottle it turns from a gas to a liquid.
  • The mass of ice decreases when it is melted


Lab 2.5: The Mass of Copper and Sulfur

Lab 2.5: The Mass of Copper and Sulfur

  • The Mass of Copper and Sulfur decreases when it is heated.


Lab 2.6

  • Alka seltzer is an antacide pain reliever that contains aspirin, citric acid, sodium bicarbonate (baking soda), and it produces gas.
  • In this lab, when a solid and a liquid produce a gas the mass increases.


Ch. 2 Test

  • Know all errors from labs
  • Condensation will form on the outside of the bottle and freeze, which adds mass
  • This happens when the temperature significantly drops in a closed environment/system
  • Remember to write the units
  • Know histograms


Chapter 3

Lab 3.2: Mass and Volume

  • The substance affects the mass of an object
  • Brass density is 8.5
  • Aluminum density is 2.7
  • Use grad. cyl to find volume of irregular shaped objects


Chemistry Lab - Density of Solids

Lab 3.5: Density of a Solid

  • Cube 1 and the slab are aluminum
  • Cube 2 is steel
  • Rock is irregular shaped object, so it's volume is measured in the g. cyl
  • The rocks are not all the same even though they are from the same rock because they are made of different materials/substances.


Lab 3.6: Density of a Liquid

  • The densities indicate that they are different substances
  • Liquid A is Magnesium Sulfate (density is around 1.15) (Epsom Salt)
  • Liquid B is Water (density is 1.0)
  • Magnesium Sulfate is used as a laxitant.


Density of a Gas.WMV

Lab 3.7: Density of a Gas

  • The gas's density is so small that we have to express it in scientific notation (10 to the -3rd power)
  • Gas is produced from Alka seltzer


Ch.3 Test

  • Know all errors and calculations
  • If someone forgets to include the foil for the Mf in the Density of a Gas lab the result is an increase in density and an increase in mass
  • If you incorrectly insert the tubing in your bottle during the Density of a Gas lab the result an increase in density and a decrease in volume
  • Know graphs