The grams of MgCl 2 that must dissolve to equal the ion concentration of 12.4 g of NaCl is to be calculated. Concept introduction: Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products. Consider the general reaction, A + 2 B → 3 C One mole of A reacts with two moles of B to produce three moles of C . The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
The grams of MgCl 2 that must dissolve to equal the ion concentration of 12.4 g of NaCl is to be calculated. Concept introduction: Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products. Consider the general reaction, A + 2 B → 3 C One mole of A reacts with two moles of B to produce three moles of C . The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
The grams of MgCl2 that must dissolve to equal the ion concentration of 12.4 g of NaCl is to be calculated.
Concept introduction:
Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products.
Consider the general reaction,
A+2B→3C
One mole of A reacts with two moles of B to produce three moles of C. The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
(b)
Interpretation Introduction
Interpretation:
The mass of CaS that must be dissolved is to be calculated.
Concept introduction:
Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products.
Consider the general reaction,
A+2B→3C
One mole of A reacts with two moles of B to produce three moles of C. The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
(c)
Interpretation Introduction
Interpretation:
Among the three salt solutions that would dissolve the most protein is to be identified.
Concept introduction:
Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water. MgCl2, NaCl and CaS are the ionic compound that dissociates into ions when dissolved in water. The dissociation reaction of these ionic compounds is as follows:
3.
a.
Use the MS to propose at least two possible molecular formulas.
For an unknown compound:
101.
27.0
29.0
41.0
50.0
52.0
55.0
57.0
100
57.5
58.0
58.5
62.0
63.0
64.0
65.0
74.0
40
75.0
76.0
20
20
40
60
80
100
120
140
160
180
200 220
m/z
99.5
68564810898409581251883040
115.0
116.0
77404799
17417M
117.0
12.9
118.0
33.5
119.0
36
133 0
1.2
157.0
2.1
159.0
16
169.0
219
170.0
17
171.0
21.6
172.0
17
181.0
1.3
183.0
197.0
100.0
198.0
200.
784
Relative Intensity
2
2
8
ō (ppm)
6
2
Solve the structure and assign each of the following spectra (IR and C-NMR)
1.
For an unknown compound with a molecular formula of C8H100:
a.
What is the DU? (show your work)
b.
Solve the structure and assign each of the following spectra.
8
6
2
ō (ppm)
4
2
0
200
150
100
50
ō (ppm)
LOD
D
4000
3000
2000
1500
1000
500
HAVENUMBERI -11
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