Bonds, IMF, Polarity
What determines a bonds polarity and how do we find it?
The difference in electronegativity and subtracting the highest from the lower
Sodium Chloride
NaCl
How does a Vander Whall Force or London Dispersion Force work and is it weak or strong?
It is an IMF and it holds molecules togeather by a shift in electron density and a momentary attraction. Its a weak force
What is the Solubility of KCL at 70 degrees Celsius?
58 g per 100g of water
140g KI per 100 g of water
How do we determine if a Molecule is polar
The difference in electronegativity is greater than 0.4 and its symmetry
Aluminum Oxide
Al2O3
How do Dipole Diople Interactions work and are they weak or strong?
They are an attraction between polar molecules where the slightly positive and slightly negative ends attract. They are medium strength
How much HCl do I need to saturate 45 g of water at 35 degrees Celsius?
Write the formula for the molecule
Sodium Sulfide
Na2S
Which bond is polar- you need to show your work
H-F or C-H
H-F
4-2.1=1.9
Copper (II) Oxide
CuO
What elements are part of the Hydrogen Bonds?
F, O, N
How much water would I need to saturate 45g of NaNO3 at 25 degrees celsius?
40.5 grams of water
Is the molecule polar and what type of IMF does it have
Need to explain why
CO2
nonpolar due to symmetry and it would have London dispersion forces
Is this a bond or an IMF
1.Multiple H-F are together
2.C is connected to H
1. IMF
2. Bond
Lead (III) Nitrate
Fe(NO3)3
What IMF force (s) hold together this molecule
NH3
London Dispersion, Hydrogen Bonds
Is the solution saturated, unsaturated or supersaturated?
45g of NH3 in 150 g of water at 50 degrees celsius?
supersaturated because saturation is 28g per 100g of water and we have 30 g per 100g of water
What temperature are is NaNO3 soluble in 100g of water?
72 degrees Celsius
What is the difference between a Bond and an Intermolecular Force
A bond holds atoms together and an IMF hold the same types of molecules together
Chromium (VI) Phosphate
Cr(PO4)2
What IMF hold together this molecule
CF4
London Dispersion forces
Is the solution saturated, unsaturated, or supersaturated?
85g of NaCl in 450g of water at 45 degree celsius?
undersaturated because saturated is 48g per 100g of water and we have 19g per 100g of water
You started with a saturated solution of NH3 in 100 g of water at 10 degrees Celcius. How many grams of NH3 gas would bubble out of the solution if you raised the temperature to 80 degrees Celcius
At 10 70g/100g water
at 80 14 g/100g water
70-14 g=56 g NH3 lost