IPS Quiz #1 Study Guide

Reaction in a Bag Lab

Solid A:
  • Name: Calcium Chloride (made up of Calcium and Chlorine)
  • Acidic
  • Hydrotropic (Meaning it absorbs water)

Solid B:

  • Name: Sodium Bicarbonate (Baking Soda)
  • Alkaline
  • Hydrotropic

Red Liquid:

  • Name: Phenol Red

Uses: -A ph indicator


Words to know:


  • Endothermic: Cold reaction
  • Exothermic : Warm reaction



Heating Baking Soda Lab

Part 1

What happens at the top of the beaker during the lab?

  • condensation forms/moisture/misty/foggy.
Where does the gas come from?
  • Gas comes from the baking soda being heated.

Where did the droplets come from in the lab?

  • droplets came from hot gas touching cooler top of the test tube and turning back into a liquid (water cycle).

Part 2

Are the 2 substances in the beakers the same of different? Explain.

  • They are the different because the unheated test tube is only baking soda and tea so the heated should be the same color (and it isn't).

Words to know:


  • control group: when your in control of what happens (unheated baking soda and tea)
  • experimental group: when its out of your control (heated baking soda and tea)
  • indicator: shows something (tea, it showed that the heated test tube isn't baking soda)
  • variables: a category you try to measure, there are 2 types:
  • independent variable: will cause a change in the dependent (temperature)
  • dependent variable: depends on the independent (tea color)
  • control factors: things we can control in the lab (using the same type of tea, same amount of baking soda, same amount of tea, same size test tube, same amount of stirring time)



Lab 1.1 Heating Baking Soda

Volume Notes

  • Unit of measurement: cm3 (cubic centimeter)
  • Volume: length x width x height
  • Standard unit of measurement: meter (M)
  • Volume= surface x depth (height)
  • As the depth increases the surface decreases (or other way around)

Volume of Liquids:

  • Always use a graduated cylinder to measure volume
  • Always check intervals or scale
  • Unit of measurement: milliliters (mL) or cm3


Single Pan Balance Notes

  1. Check to make sure the pan is clear and dry
  2. Always "zero" balance before EACH massing

  • Push all riders to zero
  • Use adjustment knob if needed

3. Never switch pans

4. Pick up balance by red bar ONLY

5. Do not zero balance the scale when finished


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Safety Notes

For Every Lab

  • Goggles must be kept over your eyes until Mr. Leeds says to put them away
  • Report ALL accident/spills to Mr. Leeds immediately
  • Always try to use your common sense

In Case of Emergency

  • Nurse: ext: 2828

Safety Equipment in the Classroom

  • Fire extinguisher
  • Fire blanket
  • Shower/ Eye wash

Chemicals

  • Never taste chemicals
  • Always WAFT liquids to detect odor
  • NEVER WAFT SOLIDS/POWDERS
  • Avoid touching chemicals
  • Always wash your hands with soap and water after each lab
  • If chemicals touch skin: flush skin with water of r1 minute and notify Mr. Leeds

Glass

  • Hot glass and cold glass look the same
  • Never use chipped or broken glass

-tell Mr. Leeds and dispose of broken glass in proper trash can (the glass box)

  • Never use force to remove of insert glass

Alcohol Burners

  • Roll sleeves, put UP hair (or you may not participate in lab)
  • Never walk away from a lit burner
  • Never point open end of a test tube at yourself 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 with lab

End of Lab

  • Clean up (or you lose points)
  • Make certain that burner is out if one was used
  • Keep goggles on (over eyes) until Mr. Leeds says to put them away


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