Chemical Reactions
These are the products of complete combustion
What are CO2 and H2O
This is the molar ratio of water to acid in this reaction:
2H3PO4 + 3Ba(OH)2 --> 3H2O + Ba3(PO4)2
What is 3 to 2 (3:2)
Of the following it has the largest atomic radius:
Sodium, Fluorine, Barium, Oxygen
What is Barium
You add 5L of juice concentrate to 20L of water. What is the (V/V%) of the resulting drink?
20% (5/25 not 5/20)
(no lost money for incorrect guesses)
This is Mr. Alex's favourite colour
What is green
A metal carbonate (such as Na2CO3) decomposes into these two products
metal oxide and carbon dioxide gas
If you have one mole of hydrogen gas and one mole of nitrogen gas to for ammonia, this is the limiting reactant?
3H2 + N2 --> 2NH3
What is Hydrogen Gas
For an ideal gas, as pressure increases, temperature ______ (assuming volume is kept constant)
Increases
You collect the following data:
Watchglass 5g
Product + Watchglass 23g
Theoretical Product produced 25g
What is your Percent Yield?
What is 72%
(no lost money for incorrect guesses)
If Mr. Alex went to an amusement park, he would line up first for...
a) The ferris wheel
b) The scariest roller coaster
c) The ride that spins the fastest
d) The water park slides
e) The park bench (I hate rides)
b) The scariest roller coaster
This is the precipitate in this reaction
MgCl2 + NaOH -> ?
Mg(OH)2
bonus question:
1) What is this type of reaction called?
Four moles of Iron Hydroxide decomposes into iron oxide and water (see below). This is the mass of water that is produced.
2Fe(OH)3 --> Fe2O3 + 3H2O
What is 108g of water.
If an acid dissociates its proton (H) close to 100%, we call it this.
A Strong Acid
5 moles of an unknown chemical has a mass of 919.2g. What is the identity of this element?
What is Tungsten (W)
(no lost money for incorrect guesses)
Mr. Alex's favourite type of movie is:
a) Action/Adventure
b) Comedy
c) Horror
d) Science Fiction
e) Romantic Comedy
c) Horror
CuCl2 solution and an unknown metal create a brown precipitate when combined. These are three possible identities of these metals
Answers Vary
3L of Br2 reacts with excess hydrogen gas to produce HBr at STP. This is the mass of HBr that is produced.
Br2 + H2 --> 2HBr
What is 21.67g of HBr
Name two metals that would react in acid but not in water
Answers will vary
The empirical formula of a compound is CH2O. If the molar mass of the actual molecule is 180.2g/mol, what is the formula of the compound?
C6H12O6 (sugar!)
This was Mr. Alex's job before becoming a teacher:
a) Accountant (works with money)
b) Veterinarian (doctor for animals)
c) Paramedic (Ambulance Medical)
d) Programmer (Computer Coding)
e) Chef (Cooking)
C) Paramedic
This is the full balanced chemical equation for the reaction of potassium fluoride reacting with calcium carbonate.
2KF + CaCO3 --> K2CO3 + CaF2
Bonus: Does this reaction occur?
100g of silver is placed in 100mL of 2M nitric acid. What concentration of silver nitrate is produced?
2Ag + 2HNO3 --> 2AgNO3 + H2
What is 9.27M
What intermolecular forces would you expect in a beaker of H-Br molecules? (must get all of them)
-London Dispersion
-Hydrogen Bonding
-Dipole-Dipole
A common diatomic gas at 20OC takes up a volume 3L at 200KPa. If the gas has a mass of 7.88g. Predict the identity of the gas.
Oxygen gas
What is Mr. Alex's favourite TV Show (it was mentioned in class during one of the Units)
The Mole