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
SubmitMy AnswersGive
Up
Part B
Calculate the pH of this solution.
Express your answer using two decimal places.
pH =
SubmitMy AnswersGive
Up
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...
calculate the
mass concentration and molar concentration for 67.2% (by weight)
nitric acid solution. The density of nitric acid solution (67.2% by
weight) is 1.4 g/cm
Kb
"weak base calculations"
1. The hydronium ion concentration of an aqueous solution of
0.538 M ammonia is
H3O+ _______ M
Kb WEAK BASE CALCULATIONS
2. The pOH of an aqueous solution of 0.408 M isoquinoline(a
weak base with the formula C9H7N) is _______
* the formula for this is not -log[OH-]
Buffer:
3. A solution contains 0.460 M sodium cyanide and 0.314 M
hydrocyanic acid.
The pH of this solution is _____.
4. 2NOBr <-----> 2NO + Br2
If...