Part A Calculate the molar concentration of OH− ions in a
8.1×10−2 M solution of ethylamine (C2H5NH2)(Kb=6.4×10−4). Express
your answer using two significant figures. [OH−] = M
Part B Calculate the pH of this solution. Express your answer
using two decimal places.
Part A
Calculate the molar concentration of OH− ions in a
7.4×10−2 M solution of ethylamine
(C2H5NH2)(Kb=6.4×10−4).
Express your answer using two significant figures.
[OH−] =
M
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Part B
Calculate the pH of this solution.
Express your answer using two decimal places.
pH =
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Calculate the molar concentration of OH negative in water
solutions with the following H3O positive molar concentrations:
a) 0.044
b) 1.3 * 10 to the negative 4 power
c) 0.0087
d) 7.9 * 10 to the negative 10 power
e) 3.3 * 10 to the negative 2 power
(Please show clear handwriting and step by step) Thank you!!
Calculate the solubility, molar solubility, and the
concentration of the complex mercury ion (Hg22+) and sulfate
(SO42-) ions in a saturated solution of mercury sulfate, Hg2SO4(s),
in water at 25 degrees C. You must write the chemical reaction and
the equilibrium equation and show your work to receive credit! Ksp
= 6.5 x 10-7
What is the solubility?
What are the units of solubility?
What is the molar solubility?
What are the units of molar solubility What is the concentration...
A solution is 5 mM in each of the following ions:
number
ion
Ksp of M(OH)2
1
Mg2+
1.8e-11
2
Cd2+
2.5e-14
3
Co2+
1.6e-15
4
Zn2+
4.4e-17
5
Cu2+
2.2e-20
Indicate which of the metal ions would precipitate (or start to
precipitate) at each of the following pH values. Indicate your
answer with the number of the ion. Use 0 to indicate no
precipitate. If more than one precipitate is expected, list the
numbers in increasing order and separate...
A solution is 5 mM in each of the following ions:
number
ion
Ksp of M(OH)2
1
Mg2+
1.8e-11
2
Cd2+
2.5e-14
3
Co2+
1.6e-15
4
Zn2+
4.4e-17
5
Cu2+
2.2e-20
Indicate which of the metal ions would precipitate (or start to
precipitate) at each of the following pH values. Indicate your
answer with the number of the ion. Use 0 to indicate no
precipitate. If more than one precipitate is expected, list the
numbers in increasing order and separate...
1. Calculate the concentration of the lactate ion in a solution
that is 0.100 M in lactic acid (CH3CH(OH)COOH, pKa = 3.86) and
0.080 M in HCl.
2. For the generic equilibrium HA(aq) ⇌ H+(aq) + A−(aq), which
of these statements is true?
If you add the soluble salt KA to a solution of HA that is at
equilibrium, the pH would increase.
If you add the soluble salt KA to a solution of HA that is at
equilibrium, the...