Shapes/Polarity
If central atom only has two things around it, what is the shape?
Linear
List the IMFs present in:
CH4
Induced Dipole, presence of electrons
If there are 2 mol of HCl in 5 L of solution, what is the concentration?
.4 M HCl
An alkane is....
C-C bond
How do you determine if a molecular or ionic compound can be dissolved in water?
Molecular: similar IMFs, dipole-dipole at least
Ionic: solubility chart, (aq)
Is the following compound polar, provide one logical reason:
H2O
Yes:
lone pairs on the central atom
What forces are present in a solution of dimethyl ether:
CH3-O-CH3
Induced, electron presence
Dipole-dipole, polar
If there are 18.0 grams of NaOH in 350 mL of solution, what is the concentration:
1.3 M NaOH
This is an example of:
CH3-CH2-OH
An alcohol
Can any of the following dissolve in water:
CH4, CH3CH2, CO2, CCl4
No, they are all nonpolar molecules.
What is the shape of:
CH2Cl2
Tetrahedral
Which would have the highest boiling point:
CH3CH2CH3, HOSO2OH, CH3CH2CH2OCH2CH2CH3
HOSO2OH
All IMFs present
If 100 mL of water is added to a 250 mL solution of 6M HCl, what is the final concentration?
4.3 M HCl
List the functional groups present in the molecule below.
H3COCH3
Alkane
Ether
Does a solid form when you mix potassium phosphate with lithium iodide? If so, what is it called?
Li3PO4
Lithium phosphate
What is the name of the shape of NF3?
Trigonal Bipyramidal
1 lone pair, 3 bonds
Decide if the following molecule is polar or nonpolar. If it is polar, draw where the partial positive and the partial negative charges would be.
CH3-O-CH3
Polar
Partial positive on carbon
Partial negative on O
If adding 250 mL of water results in a solution of .15 M NaOH that originally only had a volume of 150mL, what was the original concentration of NaOH?
.4 M NaOH
Draw the structures and identify the difference between and alcohol and a carboxylic acid?
Carboxylic acid has an extra oxygen double bonded to the carbon that is also bonded to an alcohol.
Write out the net ionic equation for the following reaction:
K3PO4 (aq) + LiI (aq) -->
3Li+ (aq) + (PO4)3- (aq) --> Li3PO4 (s)
Rank the following from smallest bond angle to largest:
CO2, SH2, SO2
SH2>SO2>CO2
Draw the hydrogen bond that occurs with a molecule of ammonia .
NH3
Lone pair on nitrogen attracts hydrogen on another ammonia molecule.
For the following reaction, if 2.0 M KOH were added to a solution containing 250mL of H2SO4 and it took 150 mL of KOH to reach the equivalence point, what was the original concentration of H2SO4?
(hint: think titration)
H2SO4 (aq) + 2KOH(aq) --> 2H2O (l) + K2SO4(aq)
.6 M H2SO4
Of the following functional groups, which can hydrogen bond:
Carboxylic Acid
Alkyne
Alcohol
Ether
Alkane
Alkene
Carboxylic Acid
Alcohol
Determine which compound would be the most soluble in water. Draw the IMFs present in order to verify your answer. (hint: draw how certain bonds with water might be formed)
CH3-O-CH3
CH3CH2-OH
CH3CH2-OH, because of hydrogen bonding between the oxygen on ethanol and hydrogens on water.
Also with the hydrogen on the ethanol and the oxygen of water.