A buffer with a pH of 3.90 contains 0.15 M of sodium benzoate
and 0.30 M...
A buffer with a pH of 3.90 contains 0.15 M of sodium benzoate
and 0.30 M of benzoic acid. What is the concentration of [H ] in
the solution after the addition of 0.050 mol of HCl to a final
volume of 1.4 L?
A buffer with a pH of 4.06 contains 0.13 M of sodium benzoate
and 0.18 M of benzoic acid. What is the concentration of [H ] in
the solution after the addition of 0.052 mol of HCl to a final
volume of 1.3 L? Assume that any contribution of HCl to the volume
is negligible.
A buffer with a pH of 3.98 contains 0.23 M of sodium benzoate
and 0.38 M of benzoic acid. What is the concentration of [H3O+] in
the solution after the addition of 0.054 mol HCl to a final volume
of 1.6 L? Assume that any contribution of HCl to the volume is
negligible.
[H3O] =
A buffer with a pH of 4.28 contains 0.31 M of sodium benzoate
and 0.26 M of benzoic acid. What is the concentration of [H ] in
the solution after the addition of 0.050 mol of HCl to a final
volume of 1.3 L? Assume that any contribution of HCl to the volume
is negligible.
A 1.00 liter solution contains 0.39 M
ammonia and 0.30 M
ammonium nitrate.
If 0.15 moles of nitric acid are
added to this system,
indicate whether the following statements are TRUE
(T) or FALSE (F).
(Assume that the volume does not change upon the addition of
nitric acid.)
A. The number of moles of
NH3 will
increase.
B. The number of moles of
NH4+ will remain the
same.
C. The equilibrium concentration of
H3O+ will increase.
D. The pH will...
Calculate the pH of a 0.01 M solution of sodium benzoate.
A: Dissociation constant of benzoic acid.
B: Calculate the hydrolysis constant of sodium benzoate.
C: Calculate the pH of the 0.01 M solution.
Which of the following aqueous solutions are good buffer
systems?
.
a. 0.15 M sodium hydroxide +
0.29 M sodium
bromide .
b. 0.31 M hydrofluoric acid +
0.20 M potassium
fluoride .
c. 0.27 M nitric acid +
0.24 M potassium
nitrate .
d. 0.16 M hydrocyanic acid +
0.18 M potassium
cyanide .
e. 0.31 M ammonium
nitrate + 0.30 M
ammonia .
b.How many moles of sodium hydroxide would have
to be added to 250 mL of...