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WorksheetsAP Chemistry Acids and Bases
Total questions: 24
Worksheet time: 48mins
Will this be a buffer:
1 mol HCl and 1 mol NaOH
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of HF and 1 mol NaF
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of CH3COOH and 0.5 mol NaOH
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of CH3COOH and 1 mol NaOH
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of HClO4 and 1 mol NaClO4
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of CH3NH2 and 1 mol CH3NH3+
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
Will this be a buffer:
1 mol of HCOOH
Yes, it is a weak acid/base and its conjugate
Yes, it will form a weak acid/base and its conjugate
No, it contains only a strong acid/base and its conjugate
No, it will form a neutral salt
Not really, it will be predominately a weak acid/base or a weak conjugate
What will be the pH if this salt is added to water:
KI
pH = 7
pH > 7
pH < 7
What will be the pH if this salt is added to water:
NaCH3COO
pH = 7
pH > 7
pH < 7
What will be the pH if this salt is added to water:
NaNO3
pH = 7
pH > 7
pH < 7
What will be the pH if this salt is added to water:
NH4Cl
pH = 7
pH > 7
pH < 7
What will be the pH if this salt is added to water:
CH3CH2NH3NO3
pH = 7
pH > 7
pH < 7
What will be the pH if this salt is added to water:
NH4NO2
Ka HNO2 = 4.0x10-4
Kb NH3 = 1.8 x 10-5
pH = 7
pH > 7, NH3 is a stronger base than HNO2 is an acid
pH < 7 HNO2 is the stronger acid than NH3 is a base
pH > 7, NO2- is the stronger base than NH4+ is an acid
pH < 7, NH4+ is a stronger acid than NO2- is a base
What will be the pH if this salt is added to water:
C5H6NCN
Ka HCN = 6.2 x 10-10
Kb C5H5N = 1.7 x 10-9
pH = 7
pH > 7, C5H5N is a stronger base than HCN is an acid
pH < 7 HCN is the stronger acid than C5H5N is a base
pH > 7, CN- is the stronger base than C5H6N+ is an acid
pH < 7, C5H6N+ is a stronger acid than CN- is a base
What will be the pH if this salt is added to water:
NH4ClO
pKa HClO = 7.46
pKb NH3 = 4.74
pH = 7
pH > 7, NH3 is a stronger base than HClO is an acid
pH < 7 HClO is the stronger acid than NH3 is a base
pH > 7, ClO- is the stronger base than NH4+ is an acid
pH < 7, NH4+ is a stronger acid than ClO- is a base
Which Ka would be best to prepare a buffer with pH of 9.5
Ka = 1.9 x 10-5
Ka = 9.5 x 10-4
Ka = 1.2 x 10-10
Ka = 2.0 x 10-9
30mL of 0.1M weak acid (Ka = 1.0x10-5) is titrated with .2M strong base.
Before the titration begins, the pH is closest to:
1
3
5
7
9
30mL of 0.1M weak acid (Ka = 1.0x10-5) is titrated with .2M strong base.
At the equivalence point, the pH is closest to:
1
3
5
7
9
What can be added to a solution of HCOOH to make a buffer solution?
I - HCl II - NaOH III - NaHCOO
I only
II only
III only
I or III
II or III
A buffer solution is made from lactic acid (pKa = 3.86) and sodium lactate. At a pH of 2, which is true?
[HC3H5O3] > [NaC3H5O3]
[HC3H5O3] ~= [NaC3H5O3]
[HC3H5O3] < [NaC3H5O3]
A buffer solution is made from lactic acid (pKa = 3.86) and sodium lactate. At a pH of 4, which is true?
[HC3H5O3] > [NaC3H5O3]
[HC3H5O3] ~= [NaC3H5O3]
[HC3H5O3] < [NaC3H5O3]
A buffer solution is made from lactic acid (pKa = 3.86) and sodium lactate. At a pH of 7, which is true?
[HC3H5O3] > [NaC3H5O3]
[HC3H5O3] ~= [NaC3H5O3]
[HC3H5O3] < [NaC3H5O3]
A buffer solution is made from equal concetrations of lactic acid and sodium lactate. When NaOH is added to the buffer, which is true
[HC3H5O3] > [NaC3H5O3]
[HC3H5O3] ~= [NaC3H5O3]
[HC3H5O3] < [NaC3H5O3]
Both [HC3H5O3] and [NaC3H5O3] increase
Both [HC3H5O3] and [NaC3H5O3] decrease
A buffer solution is made from equal concetrations of lactic acid and sodium lactate. When HCl is added to the buffer, which is true
[HC3H5O3] > [NaC3H5O3]
[HC3H5O3] ~= [NaC3H5O3]
[HC3H5O3] < [NaC3H5O3]
Both [HC3H5O3] and [NaC3H5O3] increase
Both [HC3H5O3] and [NaC3H5O3] decrease
