UNE 1011 midterm Exam Questions with
100% Correct Answers Latest Versions Top
Rated
which of the following will have the lowest conductivity when
dissolved in water?
a. 0.1 M potassium chloride KCl
b. 0.1 M sodium sulfate Na2SO4
c. 0.1 M calcium nitrate Ca(Na3)2
d. 0.1 M sucrose, C12H22O11
d. 0.1 M sucrose C12H22O11
true or false: many soap or detergent molecules surround non polar
substances to form collide particles that can easily be washed away
true
The pressure of carbon dioxide in a bottle of sparkling water is 2.50
atm at 25 degrees C. What mass of CO2 is dissolved in a 0.5L bottle of
sparkling water? The Henrys law constant for CO2 in water is 3.3 X
10^-2 mol/LXatm
1.8g
in the reaction 3H2(g) + N2(g) --> 2NH3(g) the instantaneous rate of
consumption for H2 during an experiment is determined to be 5.76 X
10^-3 molL^-1. What is the instantaneous rate of production of NH3?
3.84 X 10^-3 mol L^-1 min^-1
an integrated rate law describes
,the relationship between the initial concentration of reactants and the
concentration of reactants at a specific time
The reaction rate that is calculated at any specified time while the
reaction is proceeding is the ___
instantaneous rate
Reactant vs time positive slope going up diagonal slope= k. What
order type of reaction is this
second order
Arrange each solution from lowest to highest freezing point assuming
each solution has a volume of 100 mL
1. pure water
2. water with 1 teaspoon of dissolved sugar
3. water with 2 teaspoons of dissolved sugar
4. water with 1/2 teaspoon of dissolved sugar
3,2,4,1
T/F: a 5.0% NaCl solution has a lower freezing point than a 2.0% NaCl
solution
true
T/f: a 2.0% NaCl solution has a higher freezing point than pure water
false
T/F: A 10% NaCl solution has a higher boiling point than a 5% NaCl
solution
true
, T/F: a 5.0 sucrose solution has a higher boiling point than pure water
true
T/F: a 2.0% NaCl solution has a higher vapor pressure than pure water
false
T/F: A 5.0% sucrose solution has a higher osmotic pressure than a 10%
sucrose solution
false
osmosis
solvent in a less concentrated solution passes through a membrane into
a more concentrated solution
has an inversely proportional relationship with temperature
concentration of the solution
has a proportional relationship with temperature
osmotic pressure
allows only certain particles to pass through
semipermeable membrane
______ is/are needed to stop the movement of solvent through a
membrane
osmotic pressure
T/F: colligative properties (freezing point depression, boiling point
elevation, and osmotic pressure) have been used to determine the
molar mass of a solute
100% Correct Answers Latest Versions Top
Rated
which of the following will have the lowest conductivity when
dissolved in water?
a. 0.1 M potassium chloride KCl
b. 0.1 M sodium sulfate Na2SO4
c. 0.1 M calcium nitrate Ca(Na3)2
d. 0.1 M sucrose, C12H22O11
d. 0.1 M sucrose C12H22O11
true or false: many soap or detergent molecules surround non polar
substances to form collide particles that can easily be washed away
true
The pressure of carbon dioxide in a bottle of sparkling water is 2.50
atm at 25 degrees C. What mass of CO2 is dissolved in a 0.5L bottle of
sparkling water? The Henrys law constant for CO2 in water is 3.3 X
10^-2 mol/LXatm
1.8g
in the reaction 3H2(g) + N2(g) --> 2NH3(g) the instantaneous rate of
consumption for H2 during an experiment is determined to be 5.76 X
10^-3 molL^-1. What is the instantaneous rate of production of NH3?
3.84 X 10^-3 mol L^-1 min^-1
an integrated rate law describes
,the relationship between the initial concentration of reactants and the
concentration of reactants at a specific time
The reaction rate that is calculated at any specified time while the
reaction is proceeding is the ___
instantaneous rate
Reactant vs time positive slope going up diagonal slope= k. What
order type of reaction is this
second order
Arrange each solution from lowest to highest freezing point assuming
each solution has a volume of 100 mL
1. pure water
2. water with 1 teaspoon of dissolved sugar
3. water with 2 teaspoons of dissolved sugar
4. water with 1/2 teaspoon of dissolved sugar
3,2,4,1
T/F: a 5.0% NaCl solution has a lower freezing point than a 2.0% NaCl
solution
true
T/f: a 2.0% NaCl solution has a higher freezing point than pure water
false
T/F: A 10% NaCl solution has a higher boiling point than a 5% NaCl
solution
true
, T/F: a 5.0 sucrose solution has a higher boiling point than pure water
true
T/F: a 2.0% NaCl solution has a higher vapor pressure than pure water
false
T/F: A 5.0% sucrose solution has a higher osmotic pressure than a 10%
sucrose solution
false
osmosis
solvent in a less concentrated solution passes through a membrane into
a more concentrated solution
has an inversely proportional relationship with temperature
concentration of the solution
has a proportional relationship with temperature
osmotic pressure
allows only certain particles to pass through
semipermeable membrane
______ is/are needed to stop the movement of solvent through a
membrane
osmotic pressure
T/F: colligative properties (freezing point depression, boiling point
elevation, and osmotic pressure) have been used to determine the
molar mass of a solute
