Question
In: Chemistry
BUFFER PROBLEMS 3. Start with either the conjugate acid or base and add a strong base...
BUFFER PROBLEMS
3. Start with either the conjugate acid or base and add a strong base or strong acid (conjugate acid plus strong base forms the conjugate base and water; conjugate base plus strong acid forms the conjugate acid): What is the pH of 0.5 L of a 0.1 M acetic acid solution to which 0.73 g of NaOH are added? The pKa of acetic acid is 4.76.
Solutions
Expert Solution
moles of CH3COOH = molarity x volume
= 0.1 x 0.5
= 0.05
moles of NaOH = mass / molar mass
= 0.73 / 40
= 0.01825
CH3COOH + NaOH ---------------------> CH3COONa + H2O
0.05 0.01825 0 0 -----------------> initial
-0.001825 - 0.01825 + 0.01825 + 0.01825 ---------------> change
0.03175 0 0.01825 0.01825 --------------->equilibrium
pH = pKa + log [CH3COONa / CH3COOH]
pH = 4.76 + log ( 0.01825 / 0.03175)
pH = 4.52
queen_honey_blossom answered 2 years agoRelated Solutions
How to determine the buffer components (conjugate acid-base pairs)?
How to determine the buffer components (conjugate acid-base
pairs)?
1a) The concentrations of acid and conjugate base in a buffer are determined experimentally to be...
1a) The concentrations of acid and conjugate base in a buffer
are determined experimentally to be 0.062 M and 0.032 M,
respectively. If the total buffer concentration given on the bottle
(the true value) is 0.052 M, then what is the percent error of the
experimental value?
b) A buffer solution is titrated with 0.027 M HCl solution. The
initial volume of the buffer is 25.00 mL. The equivalence point of
the titration is determined to be 4.47 mL. What...
Buffer capacity is defined as the number of moles of a strong acid or strong base...
Buffer capacity is defined as the number of moles of a strong
acid or strong base that is required to change the pH of 1 L of the
buffer solution by one unit. What is the buffer capacity of a
solution that is 0.12 M in acetic acid and 0.12 M in sodium
acetate? ( Ka for acetic acid is 1.8 times 10^-5.)
Buffer capacity is defined as the number of moles of a strong acid or strong base...
Buffer capacity is defined as the number of moles of a strong
acid or strong base that is required to change the pH of 1 L of the
buffer solution by one unit. What is the buffer capacity of a
solution that is 0.12 M in acetic acid and 0.12 M in sodium
acetate? ( Ka for acetic acid is 1.8 times 10^-5.)
Acetic acid and its conjugate base acetate can form an acid-base buffer. The pKa of acetic...
Acetic acid and its conjugate base acetate can form an acid-base
buffer. The pKa of acetic acid is 4.75. How much 10.0 M HNO3 must
be added to 1.00 L of a buffer that is 0.0100 M acetic acid and
0.100 M sodium acetate to reduce the pH to 4.85 ?
3.Write the formula for the conjugate acid of each of the following bases. Base: Conjugate acid:...
3.Write the formula for the conjugate acid of each of
the following bases.
Base:
Conjugate acid:
HS−
HCO3−
CO32−
HPO42−
SO42−
Acid
Conjugate base
(a) HNO2
(b)
H2SO4
(c) H2S
(d) HCN
(e) HCOOH
A buffer is prepared by combining a weak acid or base with its conjugate form. A...
A buffer is prepared by combining a weak acid or base with its
conjugate form. A buffer is made using 0.1 M KH2PO4 and 0.1 M
K2HPO4. Which component of the buffer is the acid and A)which is
the conjugate base? B)write the equation for the reaction between
the buffer and the strong acid,HCL? C)write the equation for the
reaction between the buffer and the strong base,NaOH? d)if the pKa
of the weak acid is 7.21, using the Henderson Hasselbach...
Find an appropriate buffer system (include the weak acid/base and conjugate base/acid salt) to make 1.0...
Find an appropriate buffer system (include the weak acid/base and
conjugate base/acid salt) to make 1.0 M buffer at pH 7.3.
Conjugate Acid-Base Pairs: a.) The formula for the conjugate base of H2C2O4 is _____________. b.) The...
Conjugate Acid-Base Pairs:
a.) The formula for the conjugate base of
H2C2O4 is _____________.
b.) The formula for the conjugate acid of
HCO3- is ______________.
c.) The formula for the conjugate acid of
C2O42_ is ______________.
d.) The formula for the conjugate acid of
HPO42_ is ______________.
e.) The formula for the conjugate base of
HCO3- is ______________.
f.) The formula for the conjugate acid of
HSO3- is _______________.
Conjugate Acid-Base Pairs: a.) The formula for the conjugate base of H2C2O4 is _____________. b.) The...
Conjugate Acid-Base Pairs:
a.) The formula for the conjugate base of
H2C2O4 is _____________.
b.) The formula for the conjugate acid of
HCO3- is ______________.
c.) The formula for the conjugate acid of
C2O42_ is ______________.
d.) The formula for the conjugate acid of
HPO42_ is ______________.
e.) The formula for the conjugate base of
HCO3- is ______________.
f.) The formula for the conjugate acid of
HSO3- is _______________.
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1.)Prove that f(n) = O(g(n)), given: F(n) = 2n + 10; g(n) = n 2.)Show that...
- The interest rate on a 1-year Canadian security is 12% current exchange rate is C$ =...
- Intro to Rehabilitaion T/F True/False? A.) The rehabilitation act of 1973 was patterned after the civil...
- What is the age of the charcoal BP if currently living organisms decay at the rate...
- Using an organization with which you are familiar, identify its corporate culture and the elements of...
- Use the SQL Developer to create the four tables EMP, DEPT, PROJ, EMP_PROJ with the appropriate...
- Suppose you enter into a 9-month long forward contract on a non-dividend-paying stock when the stock...
ADVERTISEMENT