IMF
What IMF exist in Formaldehyde? (CH2O)
LDF, DDF
Which has the stronger lattice energy, Gallium Phosphide (GaP) or Potassium Bromide (KBr)?
GaP
Is Sodium Chloride (NaCl(s)) soluble (miscible) in water (H2O(l))? Why?
Yes, because the experience Ion-Dipole attractions between each other.
What is the formal charge of the central oxygen in Ozone?
(+1)
N-butane & tert-butane have the same chemical formula: (C4H10), but they have different structures. N-butane is a long chain, while tert-butane is a more condensed molecule. Which of the 2 will have a higher boiling point? Why?
N-butane will have the higher boiling point, because it has a larger surface area, allowing it to stack easier & it gives it a larger surface area.
What IMF exist in CCl3F
LDF, DDF
Which has the stronger lattice energy, Sodium Phosphate (Na3PO4) or Lithium Nitrate (LiNO3)?
Na3PO4
Is Elemental Iodine (I2(s))soluble (miscible) in Benzene (C6H6)? Why?
Yes, because their only IMF's are LDF for both compounds.
Draw the Lewis Structure for the Sulfate Anion [SO4]2-.
Response on paper
Gases and Liquids have similar physical properties, but they are not entirely alike. What are some differences between them physically?
Gases are compressible while liquids are not. Liquids do not assume the volume of the container, and they do not expand to fill the container, though they do assume the shape. Liquids also do not diffuse nearly as quickly as gases do.
What IMF exist in Glucose?
LDF, DDF, Hydrogen Bonding
Rank the following ionic compounds based on the strength of their lattice energy, from the weakest to the strongest: Iron (III) Oxide (Fe2O3), Sodium Hypochlorite (NaClO), Zinc (II) Oxide (ZnO), Aluminum Nitride (AlN)
NaClO, ZnO, Fe2O3, AlN
Is Vitamin D soluble (miscible) in water (H2O(l))? Why?
Vitamin D is insoluble (immiscible) in water due to Vitamin D having virtually no Hydrogen Bonding or DDF, therefore being unlike water in its IMF.
What is the molecular geometry of the Phosphorus in the Phosphate [PO4]3-?
Tetrahedral
What is the name of the physical change of a solid going to a gas? Is it endothermic or exothermic?
sublimation, endothermic
What IMF exist in Cyclohexane?
LDF
Rank the following ionic compounds based off of their lattice energy from the weakest to the strongest: Sodium Acetate (CH3COONa), Iron (III) Phosphate (FePO4), Magnesium Sulfate (MgSO4)
CH3COONa, MgSO4, FePO4,
Is Vitamin C soluble (miscible) in fat? Why?
Vitamin C is insoluble (immiscible) in fat. This is because fat has little to no DDF or Hydrogen bonding, & that is the primary IMF of Vitamin C.
Consider The Sulfate anion [SO4]2-, it has resonance between the double bonded and single bonded oxygens to the center Sulfur. What does it mean that the double bonds are delocalized?
The double bonds are evenly distributed amongst the oxygen atoms, and the negative charges are split as well.
What IMF exist in Vitamin C?
LDF, DDF, Hydrogen Bonding
Rank the following ionic compounds based on their lattice energy, from strongest to weakest: Sodium Formate (HCOONa), Potassium Acetate (CH3COOK), Rubidium Propanoate (CH3CH2COORb), Caesium Butyrate (CH3CH2CH2COOCs)
HCOONa, CH3COOK, CH3CH2COORb, CH3CH2CH2COOCs
Is Acetaldehyde (CH3CHO) soluble in Cyclohexane (C6H12)? Why?
Yes, and this is because Acetaldehyde has a prevalent non-polar portion of it's molecule, meaning that this portion of Acetaldehyde only has LDF as its IMF. Cyclohexane also only has IMF.
Generally, solids tend to be more dense than liquids, and liquids more dense than gases, however, Ice (H2O(s)) will float when placed in Water (H2O(l)). Why?
Ice is less dense than water due to H2O having Hydrogen bonding, causing the density to be lower when in a solid state.