Download Chemistry – Units 1-5 What do you need to know

Chemistry – Units 1-5 What do you need to know?
Use the Thinkwell exercises for review and practice
Reread the Thinkwell notes
Unit 1
 States of Matter
 Dimensional Analysis (The Up/Down Method of Unit Conversion) – Go here for
worksheets on unit conversions and mole calculations:
http://misterguch.brinkster.net/worksheets.html The answers are also here. Use
the worksheets as study guides – Do them, THEN grade them. Do NOT look sat
the answers as you do them because you won’t have any answers on the test!
 Significant figures- see “1-5 Extra Notes” page on my website
 Scientific Notation - see “1-5 Extra Notes” page on my website
 Precision vs. Accuracy
Unit 2
 Structure of the atom
 Very loose history of the discovery of the atom (don’t bother with the specific
experiments, but be familiar with names and major discovery – see the notes
pages that accompany the Thinkwell sections – note the bulleted points at the top
of the page)
 Introduction to Periodic Table – reread the notes page on that section
 Describing chemical formulas (reread those notes! Know the difference between
empirical and molecular formulas)
 Know what a cation and an anion is. Know what an isotope is.
 Know the difference between an ionic and a covalent bond.
Unit 3
 Reread the introduction notes – chemical reactions, Law of Conservation of Mass,
understand integer coefficients
 How to balance a chemical reaction. See:
http://misterguch.brinkster.net/worksheets.html and review the reaction
worksheets, and the Extra Notes page.
 The Mole and Avogadro’s Number
 Reread the Introducing Conversions of Masses, Moles, and Number of Particles
notes – this is KEY!!
 Can you determine empirical and molecular formulas?
 Determining Molar mass
 Finding limiting reagent (this is an application of the other skills in this unit)
 What is theoretical yield vs. percent yield?
 Review 3.1.3.6 carefully – again, this is application of the skills introduced in this
unit.
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Unit 4
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Calculating mass percent (this requires that you understand moles, molar mass
and how to calculate percent)
Reread notes on properties of solutions
Difference between molarity and molality
Know how to calculate concentrations of solutions (M1V1= M2V2)
Reread notes on factors determining solubility – pay particular attention to the
relationship of the periodic table and polarity
What is a precipitate?
What is a spectator ion?
Can you identify the spectator ions in a reaction?
Know the difference between an acid and base.
Know that in oxidation-reduction reactions one of the reactants is the oxidizing
agent (gains electrons) and one the reducing agent (loses electrons) You have to
pay close attention to the ions in these equations- H+ represents cannot contribute
an electron because its electron is gone (remember H has only one – see the
Periodic Table – and if it is H+, that one is gone!) Watch what happens to the +
and – signs in these equations!
Review the second page in the notes on Acid-Base Titrations – this is how you do
the calculations
I will not test on 4.1.3.2 and 4.1.3..3
Unit 5
 Know the chart I gave you in class regarding all the gas laws – memorize the
formulas!
 Practice the applications of the gas laws.
 Recognize that molecular size affects average molecular speeds of molecules in a
gas
 Know the difference between effusion and diffusion
 Be able to use Graham’s Law, particularly know how to place the numbers in an
equation where you are told that the rate of effusion of gas 1 is two
 times faster than that of gas 2. How do use that 2?
 As nice as I’m sure Mr. van der Waals is, let’s skip his equation! And 5.1.4.1