Debate Practice

i leave on Oct 9 for Khon Kaen for a family vacation. I want to practice the Tuesday through Thursday before I go

The Human Skin Animation Video

Function of the Nephron

Anatomy of a Kidney

The Human Body: Nervous System (2nd Ed., Rev.) (clip)

Nervous system

Learn Human Body - Urinary System

Circulatory system

Respiratory System

Respiration 3D Medical Animation

Sulfur plus Iron lab

Ch 16 Review Questions

molarity
Calculate the molarity of each of the following solutions.
a. 0.40 mol of NaCl dissolved in 1.6 L of solution

20.2 g of potassium nitrate, KNO3, in enough water to make 250.0 mL of
solution
dilution
You must prepare 300.0 mL of 0.750M NaBr solution using 2.00M NaBr stock solution. How many milliliters of stock solution should you use?

5. In order to dilute 1.0 L of a 6.00M solution of NaOH to 0.500M solution
how
much water must you add?
v/v
6. What is the concentration in percent by volume, %(v/v), of the following
solutions?
a. 60.0 mL of methanol in a total volume of 500.0 mL
b. 25.0 mL of rubbing alcohol (C3H7OH) diluted to a volume of 200.0 mL
with water


7. How many grams of solute are needed to prepare each of the following
solutions?
a. 1.00 L of a 3.00% (m/m) NaCl solution?
b. 2.00 L of 5.00% (m/m) KNO3 solution?


How many particles in solution are produced by each formula unit of potassium carbonate, K2CO3?

3. How may moles of particles would 3 mol Na2SO4 give in solution?


Calculate the mole fraction of solute in each of the following solutions.
a. 3.0 moles of lithium bromide, LiBr, dissolved in 6.0 moles of water

Find the molality of each of the following solutions.
a. 2.3 moles of glucose dissolved in 500.0 g of water
b. 131 g of Ba(NO3)2 dissolved in 750.0 g of water

Chem review EP 5

Find the percent by mass of water in
NiCl2 * 6H2O.

In your own words, explain hydrogen bonds.
Draw a diagram of the hydrogen bonding between three water molecules.
Explain why the density of ice at 0°C is less than the density of liquid water at 0°C.

Draw a diagram of the hydrogen bonding between three water molecules.


Explain why the density of ice at 0°C is less than the density of liquid water at 0°C.

Identify the solute and solvent in a dilute aqueous solution of potassium chloride.

Which of the following compounds are soluble in water? Which are insoluble?
a. CaCl2
b. N2
c. HBr
d. NH4C2H3O2

Write the formulas for the following hydrates.
a. Calcium sulfate dihydrate
b. Cobalt(II) chloride hexahydrate

Lab Tolgen's Reagent--testing for esters

Boys Win SHC Debate Challenge

AC 2 comprised of EP 6/1 Chanwit, Thanakorn, and Ep 4/2 Patipol tied for first along with AC 4--comprised of EP 4/2 Kasidej, EP 6/1 Chaya, and Sirin of TU with a 3-0 record at the Sacred Hearts Convent High School Challenge. There were 7 schools with 20 teams competing.

ep 6 Powerpoint review text only

Identify the following acids as monoprotic, di-protic, or triprotic. Explain your reasoning. H2CO3

What is true about the relative concentrations of hydrogen ions and hydroxide ions in each kind of solution?
basic

How many moles of HCl are required to neutralize aqueous solutions of these bases?
2 mol NH3

Write complete balanced equations for the following acid-base reactions?
H2SO4(aq) + KOH(aq) →

What substances are combined to make a buffer?


What is the molarity of sodium hydroxide if 10.0 mL of the solution is neutralized by each of the following 2.00M solutions?
56.0 mL of HCl
predict
Acidic solution?

Naming acids
Hydrochloric
HBr
Acid Nomenclature Flowchart

EP 4 Review Powerpoint text only

How many valence electrons are in each atom?
Carbon
Know your Bonds
Ionic
Covalent
Polar covalent
Coordinate covalent
Network solid

Write the correct chemical formula for the compounds formed from each pair of ions.
K+,S2−

Write formulas for each compound.
barium chloride
VSEPR
Two bonding atoms, one lone pair

Properties of metals
Sea of electrons


formula
Write the formula for these binary compounds.beryllium chloride

Naming acids

Give the names of these acids. HNO2

Test Review ep 5 text only

Test Review EP 5 Sept 2010
Gary Sakuma
Like dissolves like
What is a polar molecule?
Water
Dissolves ionics, sugars, not lipids, methane, hydrocarbons
Formulae and percent
calcium chloride dihydrate
Percent by water
Solubility is affected by
Temperature
Pressure
size
Mole fraction problem
Calculate the mole fraction of each component in a solution of 1.50 mol ethanoic acid (CH3COOH) in 12.00 mol of water.
Colligative properties
What is the freezing point of a solution of 20.0 g of CCl4 dissolved in 500.0 g of benzene? The freezing point of benzene is 5.48°C; Kf is 5.12°C/m.
m/m problem
Calculate the grams of solute required to make the following solutions.
1100 g of saline solution (0.90% NaCl (m/m))
molarity
How many grams of NaCl would you need to make 500 ml of 3.0M

Concentration of Solute
The amount of solute in a solution is given by its concentration.
Molality
What is the molality of 5 moles of KCl in 500 ml of water
Two Other Concentration Units
V/V problems
What is the concentration (in % (v/v)) of the following solutions?
55 mL of ethanol (C2H5OH) is diluted to a volume of 250 mL with water.
Calculating Concentrations
Calculate molality






Boiling Point Elevation and Freezing Point Depression
∆T = K•m•i
i = van’t Hoff factor = number of particles produced per molecule/formula unit. For covalent compounds, i = 1. For ionic compounds, i = the number of ions present (both + and -)
Compound Theoretical Value of i
glycol 1
NaCl 2
CaCl2 3
Ca3(PO4)2 5
Boiling Point Elevation and Freezing Point Depression
∆T = K•m•i
Change in Boiling Point
Dissolve 62.1 g of glycol (1.00 mol) in 250. g of water. What is the boiling point of the solution?
Kb = 0.52 oC/molal for water (see Kb table).
Solution ∆TBP = Kb • m • i

1. Calculate solution molality = 4.00 m
2. ∆TBP = Kb • m • i
∆TBP = 0.52 oC/molal (4.00 molal) (1)
∆TBP = 2.08 oC
BP = 100 + 2.08 = 102.08 oC (water normally boils at 100)

Freezing Point Depression
Calculate the Freezing Point of a 4.00 molal glycol/water solution.
Kf = 1.86 oC/molal (See Kf table)
Solution
∆TFP = Kf • m • i
= (1.86 oC/molal)(4.00 m)(1)
∆TFP = 7.44
FP = 0 – 7.44 = -7.44 oC (because water normally freezes at 0)


Freezing Point Depression
At what temperature will a 5.4 molal solution of NaCl freeze?
Solution
∆TFP = Kf • m • i
∆TFP = (1.86 oC/molal) • 5.4 m • 2
∆TFP = 20.1 oC
FP = 0 – 20.1 = -20.1 oC
Solution Molality
How many grams of potassium iodide must be dissolved in 500.0 grams of water to produce a 0.060 molal KI solution
.5 kg H20 * .6 mole KI/1 kg H2O *
166.0 gKI/1 mol KI
= answer
Types of problems on exam
Ch 15 and 16 vocabulary and reading
Mass/Mass m/m
Volume/volume v/v
Hydrates percent water and writing formulae
Molarity
Molality
Freezing point depression/boiling point elevation T=k m I

photo highlights of ASDC2010

The ASDC2010 was a great journey for our students. Our first International competition, our students got to battle the various other schools from other countries.



The three boys were Tanachai ep 6/2, Chaya EP 6/1, and Kasidej EP4/2


ASDC 2010

Highlights of the tournament: The Boys beat TU in the final round. We finished 3-4, an outstanding first time at International Competition. Mr. Gary made the play-offs as an adjudicator judging up to the Semis in the tournament.

Boys of AC Battle On in Asian Schools Debate Championships 2010

Young EP 4/2 Kasidej along with veterans EP 6/1 Chaya and EP 6/2 Tanachai face a large obstacle in the field of 11 countries with past Champions from Korea, World School players from Srilanka, last year's Champions from the Philippines, India, Malaysia, Indonesia, and others. It's been a great tournament so far with the boys standing at 2-3 going into the Final day.