Terminology
What does hydrophobic mean? Please give an example of a hydrophobic compound:)
fear of water; all nonpolar compounds are hydrophobic
Ex) CH4, H2, C2H6
What would best dissolve NH3?
CH2O
CH3CH2CH2
N2
CH2O
Given that O2 has a Henry's law constant of 1.3x10^-3 mol/L*atm and a partial pressure of 0.209 atm, what is the solubility of O2?
2.7x10^-4 mol/L
What does hydrophilic mean? Please give me an example of a hydrophilic substance:)
Ex) NH3, HF, PF3
Which would NOT readily dissolve CH3CH2CH2CH3?
CCl4
H2O
CF4
H2O
What is the molality of NaCl solution when given 0.558 mol of solute and 989 g of solvent?
0.564 m
What does unsaturated mean?
More solute can still be dissolved; all solute is dissolved
Why does gas become LESS soluble as temperature increases?
An increase in temperature results in an increase in kinetic energy which allows the gas particles to escape from the liquid.
What is the molality of Na2SO4 solution when given that the mass of Na2SO4 solute used is 135 g and 1 kg of water solvent?
0.950 m
What does saturated mean?
Cannot dissolve more solute; some particles of solute still left undissolved in solution
Why does the solubility of gases decrease with decreasing pressure?
If the pressure above a solution decreases, this allows more gases to escape which decreases the gas solubility in the solution. (soda can)
How many grams of CO2 are there per 0.29 kg of water in .5 m CO2 (aq)?
6.38 g
What is Henry's law and what is the formula?
relationship between gas solubility in liquid and partial pressure of gas; Cgas=KhPgas
Why do solids become more soluble with increasing temperature?
This results in an increase in kinetic energy which makes it harder for the molecules to stay together.
How many grams of NH3 are there per .75 g of water in 0.45 m NH3(aq)?
0.006 g