1. Find the pH of a 0.030 M barium hydroxide solution.
2. Calculate [H+] at 25oC for a solution
where [OH-] is 1.0 x 10-8 M.
3. In the following reaction, choose the conjugate acid:
HNO3(aq) + H2O(l) --->
H3O+(aq) + NO3-(aq)
A 20.00 mL solution of 0.0840M HOCl is titrated with 0.0560M KOH
solution. Calculate the pH after each of the following additions of
the KOH solution:
a. 15.00mL
b. 30.0mL
c. 32.0mL
4. Calculate the equilibrium constant at standard temperature,
25oC, for the redox reaction between Pb2+(aq) and Zn(s). HINT:
Write a balanced chemical reaction first. a) 1.17x1030 b) 1.92x1021
c) 4.38x1010 d) 1.08x1015 e) 1.75x109
16.29 calculate [H+] for each of the following solution and
indicate whether the solution is acidic, basic, or neutral.(b)
[OH-]= 8.8 * 10-9 M; (c) a solution in which [OH-] is 100 times
greater than [H+] SHOW ALL WORK
Calculate the concentration of H+ in a 0.250 M solution of
oxalic acid. Consider only [H+] from the first ionization. (Ka =
5.37 x 10^-2) Then calculate [H+] of the same solution, including
the H+ ions resulting from the second ionization. (Ka = 5.37 x
10^-5)
Calculate the [H+] in each of the following solutions and
indicate whether the solution is acidic or basic? a) [OH-] = 2.32 X
10^-4 M b)[OH-] = 8.99 x 10^-10 M c) [OH-] = 4.34 x 10^-6 M d)
[OH-] = 6.22 x 10^-12 M
At a temperature other than 25oC, Cd(OH)2
solubility is 5.5 x 10-4 . Calculate it's Ksp at this
temperature.
[ACCORDING TO MY TEXT, Ksp of Cd(OH)2 = 2.5 x
1014 @ 25 C]
A.1.7 x 10-10
B.6.7 x 10-10
C.2.5 x 10-14
Hydrogen at 25oC and 0.1 Mpa is fed to the head of a
cutting torch. Calculate the adiabatic flame temperature if the
hydrogen is burned with 250% excess air at at 25oC and
0.1 Mpa,
a) without taking into account dissociation
b) assuming equilibrium composition of water has been achieved
(both dissociation reactions of water reach chemical
equilibrium)
Hydrogen at 25oC and 0.1 Mpa is fed to the head of a cutting
torch. Calculate the adiabatic flame temperature if the hydrogen is
burned with 256% excess air at at 25oC and 0.1 Mpa,
a) without taking into account dissociation
b) assuming equilibrium composition of water has been achieved
(both dissociation reactions of water reach chemical
equilibrium)