14
C=kP
6.8e-4=k*1
0.00068=k*1
0.00068=k
C=0.00068*0.76

17
M=moles/L. molality=moles of solute/kg of solvent. 10g HCl (36.46 g/mol) + 90g H2O (18.01528 g/mol). 10/36.46=0.27427317608 mol HCl. 90/18.01528=4.99575915556 mol water. molality=0.27427317608 mol HCl/0.090 kg water=0.2742731761/0.090=3.04747973444






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Quiz Submissions - HW12
[redacted] (username: [redacted 0])
Attempt 1
Written: Feb 5, 2020 4:42 PM - Feb 5, 2020 8:12 PM
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Question 1 		1 / 1 point
Hydration is a specific example of the phenomenon known generally as __________.
Question options:
	

>A) 
	solvation
	

B) 
	dilution
	

C) 
	disordering
	

D) 
	salutation
	

E) 
	condensation
Question 2 		1 / 1 point
The phrase "like dissolves like" refers to the fact that __________.
Question options:
	

A) 
	condensed phases can only dissolve other condensed phases
	

B) 
	polar solvents dissolve nonpolar solutes and vice versa
	

>C) 
	polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes
	

D) 
	gases can only dissolve other gases
	

E) 
	solvents can only dissolve solutes of similar molar mass
Question 3 		1 / 1 point
When solutions of strong electrolytes in water are formed, the ions are surrounded by water molecules. These interactions are described as a case of __________.
Question options:
	

A) 
	saturation
	

B) 
	crystallization
	

C) 
	dehydration
	

>D) 
	hydration
	

E) 
	supersaturation
Question 4 		1 / 1 point
A saturated solution __________.
Question options:
	

A) 
	will rapidly precipitate if a seed crystal is added
	

>B) 
	contains dissolved solute in equilibrium with undissolved solute
	

C) 
	contains as much solvent as it can hold
	

D) 
	contains no double bonds
	

E) 
	cannot be attained
Question 5 		1 / 1 point
In a saturated solution of a salt in water, __________.
Question options:
	

A) 
	addition of more water causes massive crystallization
	

>B) 
	the rate of crystallization = the rate of dissolution
	

C) 
	seed crystal addition may cause massive crystallization
	

D) 
	the rate of dissolution > the rate of crystallization
	

E) 
	the rate of crystallization > the rate of dissolution
Question 6 		1 / 1 point
An unsaturated solution is one that __________.
Question options:
	

A) 
	contains more dissolved solute than the solubility allows
	

>B) 
	has a concentration lower than the solubility
	

C) 
	contains no solute
	

D) 
	has no double bonds
	

E) 
	contains the maximum concentration of solute possible, and is in equilibrium with undissolved solute
Question 7 		1 / 1 point
A solution with a concentration higher than the solubility is __________.
Question options:
	

A) 
	is not possible
	

>B) 
	is supersaturated
	

C) 
	is supercritical
	

D) 
	is unsaturated
	

E) 
	is saturated
Question 8 		1 / 1 point
The principal reason for the extremely low solubility of NaCl in benzene (C6H6) is the __________.
Question options:
	

>A) 
	weak solvation of Na+ and Cl- by C6H6
	

B) 
	hydrogen bonding in C6H6
	

C) 
	increased disorder due to mixing of solute and solvent
	

D) 
	strength of the covalent bond in NaCl
	

E) 
	strong solvent-solvent interactions
Question 9 		1 / 1 point
Which one of the following substances would be the most soluble in CCl4?
Question options:
	

A) 
	NH3
	

B) 
	CH3CH2OH
	

C) 
	H2O
	

>D) 
	C10H22
	

E) 
	NaCl
Question 10 		1 / 1 point
Which of the following substances is least likely to dissolve in water?
Question options:
	

A) 
	CH3(CH2)8CH2OH
	

B) 
	CHCl3
	

C) 
	
O
CH3(CH2)9CH
	

D) 
	HOCH2CH2OH
	

>E) 
	CCl4
Question 11 		1 / 1 point
Which one of the following substances is more likely to dissolve in benzene (C6H6)?
Question options:
	

A) 
	NH3
	

B) 
	HBr
	

>C) 
	CCl4
	

D) 
	CH3CH2OH
	

E) 
	NaCl
Question 12 		1 / 1 point
Which one of the following is most soluble in water?
Question options:
	

A) 
	CH3CH2CH2OH
	

B) 
	CH3CH2CH2CH2CH2OH
	

>C) 
	CH3OH
	

D) 
	CH3CH2OH
	

E) 
	CH3CH2CH2CH2OH
Question 13 		1 / 1 point
The largest value of the Henry's Law constant for the liquid solvent H2O will be obtained with __________ gas as the solute and a temperature of __________°C.
Question options:
	

A) 
	Ar, 11
	

B) 
	N2, 15
	

>C) 
	HCl, 49
	

D) 
	CO2, 32
	

E) 
	C2H4, 45
Question 14 		1 / 1 point
The solubility of nitrogen gas at 25 °C and 1 atm is 6.8 x 10-4 mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm, what is the concentration (molarity) of dissolved nitrogen?
Question options:
	

A) 
	4.9 x 10-4 M
	

B) 
	6.8 x 10-4 M
	

>C) 
	5.2 x 10-4 M
	

D) 
	3.8 x 10-4 M
	

E) 
	1.1 X 10-5 M
Question 15 		1 / 1 point
Pressure has an appreciable effect on the solubility of __________ in liquids.
Question options:
	

>A) 
	gases
	

B) 
	liquids
	

C) 
	salts
	

D) 
	solids
	

E) 
	solids and liquids
Question 16 		1 / 1 point
Calculate the mole fraction of phosphoric acid (H3PO4) in a 25.4% (by mass) aqueous solution.
Question options:
	

A) 
	1.00
	

B) 
	4.14
	

C) 
	0.259
	

D) 
	0.0626
	

>E) 
	0.0589
Question 17 		1 / 1 point
Calculate the molality of a 10.0% (by mass) aqueous solution of hydrochloric acid.
Question options:
	

A) 
	0.274 m
	

B) 
	2.74 m
	

>C) 
	3.05 m
	

D) 
	4.33 m
	

E) 
	The density of the solution is needed to solve the problem.
Question 18 		1 / 1 point
Which of the following choices has the compounds correctly arranged in order of increasing solubility in water? (least soluble to most soluble)
Question options:
	

A) 
	CH3OH < CH4 < LiF
	

>B) 
	CCl4 < CHCl3 < NaNO3
	

C) 
	CH3OH < Cl4 < CHCl3
	

D) 
	CH4 < NaNO3 < CHCl3
	

E) 
	LiF < NaNO3 < CHCl3
Question 19 		1 / 1 point
A 0.100 m solution of which one of the following solutes will have the lowest vapor pressure?
Question options:
	

A) 
	sucrose
	

B) 
	NaCl
	

>C) 
	Al(ClO4)3
	

D) 
	KClO4
	

E) 
	Ca(ClO4)2
Question 20 		1 / 1 point
Which of the following liquids will have the lowest freezing point?
Question options:
	

A) 
	pure H2O
	

B) 
	aqueous glucose (0.60 m)
	

C) 
	aqueous sucrose (0.60 m)
	

D) 
	aqueous FeI3 (0.24 m)
	

>E) 
	aqueous KF (0.50 m)
Attempt Score:
20 / 20 - 100 %
Overall Grade (highest attempt):
20 / 20 - 100 %