CHEM 104 Exam 2 (Latest Update)
| Practice Questions and Solutions | 100%
Correct | Guaranteed Pass
A acid is a proton _______________? -✓✓Donator
A base is a proton _____________? -✓✓Acceptor
Acid ionization involves what ? -✓✓The donation of an acidic proton to water to produce
hydronium ions
Which of these would be considered acid ionization?
A. H2O+NH−2↽−−⇀OH−+NH3
B. H2O+H2PO−4↽−−⇀H3PO4+OH−
C. CN−+H2O↽−−⇀OH−+HCN
D. PH+4+H2O↽−−⇀PH3+H3O+ -✓✓D
Term for a substance able to act as either an acid or a base by any definition -
✓✓Amphoteric
According to the 2nd law of thermodynamics the ______________ of a closed system
never decreases -✓✓Entropy
A measure of a solution concentration defined as nsolute/Vsolution is called the -
✓✓Molarity
The units of the rate of a chemical reaction are -✓✓M/s
The time required for a reactant to decrease to half of its original concentration is called
a -✓✓Half life
The arrhenius equation specifies the _____________ dependence on the rate of a
constant -✓✓Temperature
The notion that at equilibrium the rate of forward reaction equals that of the reverse
reaction is called _________Equilibrium -✓✓dynamic
, The equation giving the concentration of an equilibrium is the law of _________
_____________ -✓✓Mass action
Le Chatelier's principle states that a chemical system at equilibrium _________ an
imposed change -✓✓Counteracts
In the context of the bronsted-lowry definition a base is a -✓✓proton acceptor
At 25 ' C the ion product of water (KW) has the value of 10 -✓✓1.0x10-14
The Hydronium ions is the ___________ _____________ of water -✓✓conjugate acid
The hydroxide ions are the__________ __________ of water -✓✓conjugate base
The criterion of a weak base is that it is __________ dissociated in water -✓✓partially
the criterion for a strong acid is that it is ______________ dissociated in water -
✓✓Completely
Examples of strong acids -✓✓HCL, HBr, HI, HNO3, HCLO4, H2SO4
Examples of weak acids -✓✓HF, ACOH, CH3COOH, H2SO4
The acid ionization constant of Ka is a measure of ___________ _______________ -
✓✓Acid strength
Equilibrium constants change with _____________ -✓✓Temperature
Due to the hydrolysis of a solution NH4L is madly -✓✓Acidic
In pure water at 25 ' C the value of [OH-(aq)} is ________ -✓✓1.0 x 10^-7
A lewis acid is defined as a ____________ _____________ -✓✓Electron pair acceptor
As T decreases, the solubility of salts in water generally?
A. Increase
B. Stays constant
C. Decreases -✓✓C. Decreases`
Molality is a measure of concentration (of x) defined as
A. nx/msolvent
B. nx/Vsolution
| Practice Questions and Solutions | 100%
Correct | Guaranteed Pass
A acid is a proton _______________? -✓✓Donator
A base is a proton _____________? -✓✓Acceptor
Acid ionization involves what ? -✓✓The donation of an acidic proton to water to produce
hydronium ions
Which of these would be considered acid ionization?
A. H2O+NH−2↽−−⇀OH−+NH3
B. H2O+H2PO−4↽−−⇀H3PO4+OH−
C. CN−+H2O↽−−⇀OH−+HCN
D. PH+4+H2O↽−−⇀PH3+H3O+ -✓✓D
Term for a substance able to act as either an acid or a base by any definition -
✓✓Amphoteric
According to the 2nd law of thermodynamics the ______________ of a closed system
never decreases -✓✓Entropy
A measure of a solution concentration defined as nsolute/Vsolution is called the -
✓✓Molarity
The units of the rate of a chemical reaction are -✓✓M/s
The time required for a reactant to decrease to half of its original concentration is called
a -✓✓Half life
The arrhenius equation specifies the _____________ dependence on the rate of a
constant -✓✓Temperature
The notion that at equilibrium the rate of forward reaction equals that of the reverse
reaction is called _________Equilibrium -✓✓dynamic
, The equation giving the concentration of an equilibrium is the law of _________
_____________ -✓✓Mass action
Le Chatelier's principle states that a chemical system at equilibrium _________ an
imposed change -✓✓Counteracts
In the context of the bronsted-lowry definition a base is a -✓✓proton acceptor
At 25 ' C the ion product of water (KW) has the value of 10 -✓✓1.0x10-14
The Hydronium ions is the ___________ _____________ of water -✓✓conjugate acid
The hydroxide ions are the__________ __________ of water -✓✓conjugate base
The criterion of a weak base is that it is __________ dissociated in water -✓✓partially
the criterion for a strong acid is that it is ______________ dissociated in water -
✓✓Completely
Examples of strong acids -✓✓HCL, HBr, HI, HNO3, HCLO4, H2SO4
Examples of weak acids -✓✓HF, ACOH, CH3COOH, H2SO4
The acid ionization constant of Ka is a measure of ___________ _______________ -
✓✓Acid strength
Equilibrium constants change with _____________ -✓✓Temperature
Due to the hydrolysis of a solution NH4L is madly -✓✓Acidic
In pure water at 25 ' C the value of [OH-(aq)} is ________ -✓✓1.0 x 10^-7
A lewis acid is defined as a ____________ _____________ -✓✓Electron pair acceptor
As T decreases, the solubility of salts in water generally?
A. Increase
B. Stays constant
C. Decreases -✓✓C. Decreases`
Molality is a measure of concentration (of x) defined as
A. nx/msolvent
B. nx/Vsolution
