Laura Tucker
SI Session Sep 7th
Five day study plan
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Exams is starting early and using short, frequent study sessions. The human brain learns
academic material faster and better on an exam if done in brief blocks of time spread out over
longer periods of time, rather than in a few lengthy sessions.
o Tuesday
 Prepare 1st chunk 2 hours
o Wednesday
 Prepare 2nd chunk 2 hours Review
 1st chunk 30 minutes
o Thursday
 Prepare 3rd chunk 1-1/2 hours
 Review 2nd chunk 30 minutes
 Review 1st chunk 15 minutes
o Friday
 Prepare 4th chunk 1 hour
 Review 3rd chunk 30 minutes
 Review 2nd chunk 15 minutes
 Review 1st chunk 10 minutes
o Sunday
 Review 4th chunk 30 minutes
 Review 3rd chunk 20 minutes
 Review 2nd chunk 10 minutes
 Review 1st chunk 10 minutes
 Self-Test 1 hour
Flash cards are great too
o What do I do?
 Read all Chapters Monday-Tuesday
 Go over power points Wednesday
 Thursday go over all worksheets/Problems, make flashcards if I need too
 Sunday I review/take old exams/ Review Sessions
 Day of I skim Material to refresh
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How do you know how many bonds an element can form?
o Valence
o How many electrons it needs to get to a noble gas configuration/Get to the outershell
 How many bonds can each element make
 H (1) full at s2 orbital
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 Nitrogen (3bonds)
 Chloride (1Bond)
 Oxygen (2 Bonds)
 Carbon (4 Bonds)
Balancing Chemical Formulas
o Why do we have to balance the elements on both sides?
 1St law of Thermodynamics, Which is what?
 Energy is not created or destroyed
 What does this mean for reactions?
 Have to have the same amount for products as reactants
 Zn + HCl ---> ZnCl2 + H2
 Zn + 2HCl ---> ZnCl2 + H2
 KClO3 ---> KCl + O2
 KClO3 ---> KCl + (3/2)O2
 S8 + F2 ---> SF6
 S8 + 24F2 ---> 8SF6
 Fe + O2 ---> Fe2O3
 4Fe + 3O2 ---> 2Fe2O3 or 2Fe + (3/2)O2 ---> Fe2O3
 C2H6 + O2 ---> CO2 + H2O
 C2H6 + (7/2)O2 ---> 2CO2 + 3H2O or 2C2H6 + 7O2 ---> 4CO2 + 6H2O
What are the four molecular states?
o Solid, liquid, gas, aqueous
o Aqueous means that it dissolves in water
 Ex: salt
 Insolubible: olive oil
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Are the following soluble in water? Make sure put (aq) after
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NaCl? Why? (aq)
Ag2(SO4)? Insoluble (s)
o Why a solid?
 Li(NO3)? Soluble (aq)
Solute vs Solution vs Solvent
 Solute is smaller, like salt
 Solvent in larger quantity, like water
 Solution is everything in the mixture
How do you find concentration?
 Solute/Solvent
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o Determine the products and the state of the products (go through sample
together)
 Pb(NO3)2(aq) + 2 NaCl(aq)
 Pb(NO3)2(aq) + 2 NaCl(aq)
PbCl2(s) + 2 NaNO3(aq)
 Pb2+(aq) + 2 NO3-(aq) + 2 Na+(aq) + 2 Cl-(aq)
PbCl2(s)
+
+ 2 Na (aq) + 2NO3 (aq)
o Total Ionic Equation
2+
 Pb (aq) + 2 Cl-(aq)
PbCl2(s)
o Net Ionic Equation
 What are NO3- and Na+?
o Spectator Ions
 Problem they should do
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Na2SO3(s) + 2HCl(aq)
Na2SO3(s) + 2HCl(aq)  2NaCl(aq ) + H2O(l) + SO2(g)
Ionic Equation: Na2SO3(s) + 2H+(aq) + 2Cl-(aq)  2Na+(aq) + 2Cl-(aq) +
H2O(l) + SO2(g)
NIE: Na2SO3(s) + 2H+(aq)  2Na+(aq) + H2O(l) + SO2(g)
Spectator Ions: Cl-
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Conversion Density Problem
 How many pounds does 2 kg of cheese weight
o 1. 2.00 kg (pound / 0.4536 kg) = 4.41 pounds
 How many degrees Celsius are in 315 K?
o 315K - 273 = 42oC
 16. If the mass of a lead ball is 23.5 g and the volume is 3.5 mL, what is the
density of the lead ball?
o 23.5 g / 3.5 mL = 6.7 g/mL
 What is the density in g/mL of a substance that masses 0.987 kg and has a
volume of 4.52 x 102mL?
o . 0.987 kg (1000 g / kg) = 987 g then divide by 4.52 x 102mL = 2.18
g/mL
Final Questions?
Comments?