Calculate the concentration of Pb 2+ in each of the following. a. a saturated solution of Pb(OH) 2 , K sp = 1.2 × 10 −15 b. a saturated solution of Pb(OH) 2 buffered at pH = 13.00 c. Ethylenediaminetetraacetate (EDTA 4− ) is used as a complexing agent in chemical analysis and has the following structure: Solutions of EDTA 4− are used to treat heavy metal poisoning by removing the heavy metal in the form of a soluble complex ion. The reaction of EDTA 4− with Pb 2+ is Pb 2 + ( a q ) + E D T A 4 − ( a q ) ⇌ P b E D T A 2 − ( a q ) K = 1.1 × 10 18 Consider a solution with 0.010 mole of Pb(NO 3 ) 2 added to 1.0 L of an aqueous solution buffered at pH = 13.00 and containing 0.050 M Na 4 .EDTA. Does Pb(OH) 2 precipitate from this solution?
Calculate the concentration of Pb 2+ in each of the following. a. a saturated solution of Pb(OH) 2 , K sp = 1.2 × 10 −15 b. a saturated solution of Pb(OH) 2 buffered at pH = 13.00 c. Ethylenediaminetetraacetate (EDTA 4− ) is used as a complexing agent in chemical analysis and has the following structure: Solutions of EDTA 4− are used to treat heavy metal poisoning by removing the heavy metal in the form of a soluble complex ion. The reaction of EDTA 4− with Pb 2+ is Pb 2 + ( a q ) + E D T A 4 − ( a q ) ⇌ P b E D T A 2 − ( a q ) K = 1.1 × 10 18 Consider a solution with 0.010 mole of Pb(NO 3 ) 2 added to 1.0 L of an aqueous solution buffered at pH = 13.00 and containing 0.050 M Na 4 .EDTA. Does Pb(OH) 2 precipitate from this solution?
Solution Summary: The author explains that the concentration of PbText2+ is to be calculated in each of the given cases.
Calculate the concentration of Pb2+ in each of the following.
a. a saturated solution of Pb(OH)2, Ksp = 1.2 × 10−15
b. a saturated solution of Pb(OH)2 buffered at pH = 13.00
c. Ethylenediaminetetraacetate (EDTA4−) is used as a complexing agent in chemical analysis and has the following structure:
Solutions of EDTA4− are used to treat heavy metal poisoning by removing the heavy metal in the form of a soluble complex ion. The reaction of EDTA4− with Pb2+ is
Pb
2
+
(
a
q
)
+
E
D
T
A
4
−
(
a
q
)
⇌
P
b
E
D
T
A
2
−
(
a
q
)
K
=
1.1
×
10
18
Consider a solution with 0.010 mole of Pb(NO3)2 added to 1.0 L of an aqueous solution buffered at pH = 13.00 and containing 0.050 M Na4.EDTA. Does Pb(OH)2 precipitate from this solution?
10. Complete the following halogenation reactions for alkanes. Draw the structures of one of the
many possible products for each reaction. Name the reactant and product.
a)
CH₂- CH-CH2-CH3 + Br₂
CH₂
UV
UV
b)
+ Cl2
c)
CH3-CH₂
CHICHCHICH-CH
CH₂-CH₂
+ F2
UV
Which of the following processes involves the largest photon energy?
Group of answer choices
Electron promotion from n=2 to n=5
Electron relaxing from n=4 to n=3
Ionization of an electron from n=2
Ionization of an electron from n=4
Which of the following compounds does not match atomic ratio expectations in Mendeleev's 1872 periodic table?
Group of answer choices
NO2
Al2O3
SO3
CaO
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