PRESSURE IS ON!
How will the pressure of a gas change if we increase the temperature (volume held constant)? EXPLAIN WHY
The pressure will increase!
Heat causes particles to move faster
Br2
1. Draw out the correct Lewis structure
2. Which IMF does this molecule have?
Only London Dispersion
Br - Br
A cylinder of gas contains 200 moles of nitrogen gas and 50 moles of oxygen gas. The overall pressure in the cylinder is 18.9 atm. Calculate the partial pressure of oxygen
= 3.78 atm of O2
= 3.4 moles of HCl
If [H+] = 2.3 × 10^-4, tell me everything you can find with that information
pOH = 10.36
[OH-] = 4.4×10−11 M
pH = 3.64
How does the volume of a gas change when the temperature is increased? EXPLAIN WHY
Nothing changes! volume is not directly related to temperature
BH3
1. Draw out the correct Lewis structure
2. Which IMF does this molecule have?
Only London disperion
Magnesium metal reacts with aqueous hydrochloric acid to produce magnesium chloride and hydrogen gas, as shown in the equation below.
Mg (s)+2 HCl (aq) → MgCl2 (aq)+H2
What volume of 6.5 M aqueous HCl is required to produce 10.0 L of hydrogen gas at a temperature of 30 K and a pressure of 2.30 atmospheres?
= 2.874 moles of HCl
What is the molarity of a solution made by dissolving 89.4 grams of NaCl into enough water to make 12 L of solution?
= 0.1125 M of NaCl
If pH = 4.5, tell me everything you can find with that information
[H+] = 3.16×10−5 M
[OH-] = 3.16×10−10 M
pOH = 9.5
Gas expands as it is pressurized. What will the volume of a gas be if we started with 350mL at 75 psi and it expanded to 100 psi?
(350mL) x (75 psi) = (100 psi) x ( ? )
= 262.5 mL
H2O
1. Draw out the correct Lewis structure
2. Which IMF does this molecule have?
ALL THREE
Zinc metal reacts with aqueous sulfuric acid to produce zinc sulfate and hydrogen gas, as shown in the equation below.
Zn (s)+H2SO4 (aq)→ZnSO4 (aq)+H2 (g)
What volume of 45.0 M aq. H₂SO₄ is required to produce 20.0 L of hydrogen gas at a temperature of 300 K and a pressure of 2.98 atmospheres.
= 0.0538 moles of H2SO4
Iron(II) hydroxide can be formed from 2KOH + FeCl -> 2KCl + Fe(OH)2 how many grams of Iron(II) hydroxide can be produced from the reaction of 675mL of 2.5 M KOH with excess FeCl2
= 75.9 g of iron(II) hydroxide
If the [OH-] = 6.8 × 10^-11, tell me everything you can find with that information
[H+] = 1.5×10−4 M
pH = 3.83
pOH = 10.17
1.562 atm = 760mmHg / 1 atm
CH2O
1. Draw out the correct Lewis structure
2. Which IMF does this molecule have?
Aluminum metal reacts with aqueous hydrochloric acid to produce aluminum chloride and hydrogen gas, as shown in the balanced equation below:
2Al (s) + 6HCl (aq) -> 2AlCl3 (aq) + 3H2 (g)
What volume of 11.0 M aqueous HCl is required to produce 20.0 L of hydrogen gas at 25 °C and 6.80 atm?
= 1.02 moles of HCl
Explain the conversion steps going from grams of a reactant to grams of a product
grams of R -> moles of R
moles of R -> moles of P
moles of P -> grams of P
What is pH???
pH stands for “potential of hydrogen” and quantifies the concentration of hydrogen ions [H+] in an aqueous solution
What is the volume of 5.87 moles of gas, calculated at STP
= 131.57 L
Tell me the acronym we use to decide if H-bonding is possible. What does it mean if something has an H-bond as an IMF?
"ENOF"
H has to be bonded to an N, O, or F
This means that the H can bond with another atom
What are the equations for Boyle's law, Charles' law, and the combined gas law? Tell me what makes them different from each other.
B: P1 x V1 = P2 x V2
C: V1/T1 = V2/T2
CGL: (P1 x V1) / T1 = (P2 x V2) / T2
Discuss the difference between moles and molarity within your group
Molarity is the concentration of a solution, showing how many moles of solute are dissolved in 1 liter of solution.
A mole is a unit that measures the amount of substance.
Tell the person sitting next to you, "Good Luck" on the exam! Share what you are going to do over Thanksgiving break!
30 SECONDS!
Maddie is going home to IL to surprise her family! She wishes you all the best on your last exam for the semester :)