IPS Exam Study Guide

Chapter 1

Baking Soda Lab 1.1

Baking Soda Lab 1.1

  • baking soda lets of a gas which condensates at the top when it meets a cooler surface
  • if the heated test tube was still baking soda, it would be the same color as the heated one, since it is not, this means they are no longer the same substance
  • control group- unheated baking soda and tea
  • experimental group- heated baking soda and tea
  • indicator- tea

1.1 BDQ

  • baking soda can be used to make things rise
  • more surface=less depth/ less surface=more depth between increments

Experimental Errors

  • hole in tubing- you would not know that the baking soda is producing a gas

Volume of Sand 1.4

Volume of Sand

  • volume of sand alone= volume of sand and water - volume of water
  • volume of air space= volume of dry sand - sand alone
  • fraction of sand that is air/percent= air/dry sand

Errors

  • sand sticks to the sides of the cylinder- volume of air space will be less
  • pour water into the sand- volume of sand and water rises

1.5 Mass

1 kilogram= 2.2 pounds

1.8

Sensitivity 1.8

  • Sensitivity= change mass/# of yes's
  • Change of mass= ending mass - starting mass
  • margin of error (+-) of the balance when you mass the object

Lab Safety

  • waft liquids, not powders
  • pour acid into water when diluting acid
  • never use force to remove or insert glass
  • acid and water mixed can cause an exothermic reaction (can give off heat)
  • nurse ext. 2828
  • acid is more dense than water