麻省理工大学化学课件-第三章第六讲：溶解度和酸碱平衡
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T∆S is positive and larger than ∆Hsol 3. dissolving is only spontaneous if
T∆S is negative 4. the rate of dissolving will be slower
9
What is true if the enthalpy of solution, ΔHsol is positive?
4. All of the above
7
From the figure and your knowledge of partial pressures, state which of the following are true:
1% 1. Oxygen is more soluble in liquid at 0.5 atm than helium.
1. 34.8
64%
2. 34.75
3. 34.754
4. 34.7536
5. 34.75362
13% 13% 10%
0%
1.
2.
3.
4.
5.
2
百度文库
Which expression for Ksp is correct for the following reaction
CaF2 (s) Ca2+ (aq) + 2 F- (aq)?
1. [Ca2+][F-] 2. [Ca2+][F-]/[CaF2] 3. [Ca2+][F-]2 4. [Ca2+][F-]2/[CaF2]
3
Which expression for Ksp is correct for the following reaction
CaF2 (s) Ca2+ (aq) + 2 F- (aq)?
2. Solubility of each gas increases as its partial
5%
pressure increases
3. An increase in partial pressure of a gas will increase
2%
the rate at which gas molecules strike the surface of
5% 1. Hydrogen bond acceptor 8% 2. Hydrogen bond donor 87% 3. Both a hydrogen bond acceptor and donor 0% 4. Neither a hydrogen bond acceptor or donor
6
1. Hydrogen bond acceptor 2. Hydrogen bond donor 3. Both a hydrogen bond acceptor and donor 4. Neither a hydrogen bond acceptor or donor
5
Is glucose a hydrogen bond donor or hydrogen bond acceptor (or both or neither)?
86%
1. [Ca2+][F-] 2. [Ca2+][F-]/[CaF2] 3. [Ca2+][F-]2 4. [Ca2+][F-]2/[CaF2]
5% 1%
8%
1.
2.
3.
4.
4
Is glucose a hydrogen bond donor or hydrogen bond acceptor (or both or neither)?
Select the correct value with the appropriate number of sig figs for 101.541
1. 34.8 2. 34.75 3. 34.754 4. 34.7536 5. 34.75362
1
Select the correct value with the appropriate number of sig figs for 101.541
2. Solubility of each gas increases as its partial pressure increases
3. An increase in partial pressure of a gas will increase the rate at which gas molecules strike the surface of solvent, increasing the solubility of the gas
From the figure and your knowledge of partial pressures, state which of the following are true:
1. Oxygen is more soluble in liquid at 0.5 atm than helium.
solvent, increasing the solubility of the gas
92% 4. All of the above
8
What is true if the enthalpy of solution, ΔHsol is positive?
1. dissolving is never spontaneous 2. dissolving is only spontaneous if
4% 1. dissolving is never spontaneous
2. dissolving is only spontaneous if
76%
T∆S is positive and larger than ∆Hsol
3. dissolving is only spontaneous if
16%
T∆S is negative
4% 4. the rate of dissolving will be slower
10
From Example 2b: Identify which are Bronsted-Lowry acids and which are
Bronsted-Lowry bases for HCO3-(aq) + H2O(l) H2CO3(aq) + OH-(aq)
T∆S is negative 4. the rate of dissolving will be slower
9
What is true if the enthalpy of solution, ΔHsol is positive?
4. All of the above
7
From the figure and your knowledge of partial pressures, state which of the following are true:
1% 1. Oxygen is more soluble in liquid at 0.5 atm than helium.
1. 34.8
64%
2. 34.75
3. 34.754
4. 34.7536
5. 34.75362
13% 13% 10%
0%
1.
2.
3.
4.
5.
2
百度文库
Which expression for Ksp is correct for the following reaction
CaF2 (s) Ca2+ (aq) + 2 F- (aq)?
1. [Ca2+][F-] 2. [Ca2+][F-]/[CaF2] 3. [Ca2+][F-]2 4. [Ca2+][F-]2/[CaF2]
3
Which expression for Ksp is correct for the following reaction
CaF2 (s) Ca2+ (aq) + 2 F- (aq)?
2. Solubility of each gas increases as its partial
5%
pressure increases
3. An increase in partial pressure of a gas will increase
2%
the rate at which gas molecules strike the surface of
5% 1. Hydrogen bond acceptor 8% 2. Hydrogen bond donor 87% 3. Both a hydrogen bond acceptor and donor 0% 4. Neither a hydrogen bond acceptor or donor
6
1. Hydrogen bond acceptor 2. Hydrogen bond donor 3. Both a hydrogen bond acceptor and donor 4. Neither a hydrogen bond acceptor or donor
5
Is glucose a hydrogen bond donor or hydrogen bond acceptor (or both or neither)?
86%
1. [Ca2+][F-] 2. [Ca2+][F-]/[CaF2] 3. [Ca2+][F-]2 4. [Ca2+][F-]2/[CaF2]
5% 1%
8%
1.
2.
3.
4.
4
Is glucose a hydrogen bond donor or hydrogen bond acceptor (or both or neither)?
Select the correct value with the appropriate number of sig figs for 101.541
1. 34.8 2. 34.75 3. 34.754 4. 34.7536 5. 34.75362
1
Select the correct value with the appropriate number of sig figs for 101.541
2. Solubility of each gas increases as its partial pressure increases
3. An increase in partial pressure of a gas will increase the rate at which gas molecules strike the surface of solvent, increasing the solubility of the gas
From the figure and your knowledge of partial pressures, state which of the following are true:
1. Oxygen is more soluble in liquid at 0.5 atm than helium.
solvent, increasing the solubility of the gas
92% 4. All of the above
8
What is true if the enthalpy of solution, ΔHsol is positive?
1. dissolving is never spontaneous 2. dissolving is only spontaneous if
4% 1. dissolving is never spontaneous
2. dissolving is only spontaneous if
76%
T∆S is positive and larger than ∆Hsol
3. dissolving is only spontaneous if
16%
T∆S is negative
4% 4. the rate of dissolving will be slower
10
From Example 2b: Identify which are Bronsted-Lowry acids and which are
Bronsted-Lowry bases for HCO3-(aq) + H2O(l) H2CO3(aq) + OH-(aq)