(a) Interpretation: Whether the Ca(OH) 2 will precipitate or not under given conditions should be determined. Concept introduction: The solubility equilibria, Q s p is generally said to be the ion product because its form is that of the product of ion concentrations raised to appropriate powers. The criteria for determining whether ions in a solution will combine to form a precipitate required to compare the ion product with K s p . On comparing Q s p and K s p : If Q s pK s p , precipitation should occur. If Q s p <<K s p , precipitation cannot occur. If Q s p = K s p , a solution is saturated.
(a) Interpretation: Whether the Ca(OH) 2 will precipitate or not under given conditions should be determined. Concept introduction: The solubility equilibria, Q s p is generally said to be the ion product because its form is that of the product of ion concentrations raised to appropriate powers. The criteria for determining whether ions in a solution will combine to form a precipitate required to compare the ion product with K s p . On comparing Q s p and K s p : If Q s pK s p , precipitation should occur. If Q s p <<K s p , precipitation cannot occur. If Q s p = K s p , a solution is saturated.
Solution Summary: The author explains that the solubility equilibria, Q s p is generally said to be the ion product because its form is that of the product of ions raised to appropriate powers.
Whether the Ca(OH)2 will precipitate or not under given conditions should be determined.
Concept introduction:
The solubility equilibria, Qsp is generally said to be the ion product because its form is that of the product of ion concentrations raised to appropriate powers. The criteria for determining whether ions in a solution will combine to form a precipitate required to compare the ion product with Ksp.
On comparing Qsp and Ksp:
If QspKsp, precipitation should occur.
If Qsp<<Ksp, precipitation cannot occur.
If Qsp = Ksp, a solution is saturated.
Interpretation Introduction
(b)
Interpretation:
Whether the separation of Ca2+ from Mg2+ in sea water is feasible or not should be determined.
Concept introduction:
When the Ksp values get significantly differ from each other, separation get feasible.
Problem 3-42
Consider 2-methylbutane (isopentane). Sighting along the C2-C3 bond:
(a) Draw a Newman projection of the most stable
conformation.
(b) Draw a Newman projection of the least stable
conformation.
Problem 3-44
Construct a qualitative potential-energy diagram for rotation about the C-C bond of 1,2-dibromoethane.
Which conformation would you expect to be most stable? Label the anti and gauche conformations of 1,2-
dibromoethane.
Problem 3-45
Which conformation of 1,2-dibromoethane (Problem 3-44) would you expect to have the largest dipole
moment? The observed dipole moment of 1,2-dibromoethane is µ = 1.0 D. What does this tell you about the
actual conformation of the molecule?
Gas Law Studies
1. Mass of zinc
Determination of
0.899
2) Moles of zinc
0.01361 mol
3.) Moles of hydrogen
00?
←
I was told to calculate this
number from mole of zinc.
350m
So does that mean it will be 0.01361
mol
too?
4 Volume of water collected (mL)
5) VL of water collected (Liters) 0.350 L
6) Temp of water collected (°C)
7) Temp of water collected (°K)
8) Atmospheric pressure (mm)
9) Vapor pressure of water (mm)
10) Corrected pressure of hydrogen
20%
29°C
764.0mm Hg
(mm)
17.5mm
11) Corrected pressure of hydrogen (atm)
12) Experimentally calculated value of 19
13. Literature value of R
14) % Error
15) Suggest reasons for the % error (#14)
No wedge or dashes. Do proper structure. Provide steps and explanation.
Chapter 18 Solutions
General Chemistry: Principles And Modern Applications Plus Mastering Chemistry With Pearson Etext -- Access Card Package (11th Edition)
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