## Search found 18 matches

Sat Dec 09, 2017 4:34 pm
Forum: Trends in The Periodic Table
Topic: chapter 2 #37 part d
Replies: 1
Views: 300

### chapter 2 #37 part d

2.37 Which of the following statements are true for many- electron atoms? If false, explain why. (d) Zeff for an electron in a p-orbital is lower than for an electron in an s-orbital in the same shell. Why is this true? Wouldn't the effective nuclear charge be greater for an electron in a p-orbital ...
Mon Dec 04, 2017 10:45 pm
Forum: Conjugate Acids & Bases
Topic: HW 12.7
Replies: 3
Views: 225

### HW 12.7

12.7 Below are the molecular models of two oxoacids. Write the name of each acid and then draw the model of its conjugate base.

The molecular formula for the model is HClO3. How am I supposed to determine the name of this acid? It's apparently chloric acid.

Thank you!
Sun Dec 03, 2017 8:34 pm
Forum: Lewis Acids & Bases
Topic: Writing equations with acids and bases
Replies: 5
Views: 262

### Writing equations with acids and bases

When writing the equation for a reaction with acids and bases, should we write the double arrows to represent that it is a forward and backwards reaction when strong acids and bases are involved even though they essentially completely associate?
Sun Dec 03, 2017 8:24 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Overall Equations vs. Ionic Equations vs. Net Ionic Equations
Replies: 2
Views: 198

### Overall Equations vs. Ionic Equations vs. Net Ionic Equations

Hi! Can someone please explain the difference between these equations please? Thanks!
Wed Nov 22, 2017 11:47 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Homework 11.25 [ENDORSED]
Replies: 2
Views: 179

### Homework 11.25[ENDORSED]

11.25 In a gas-phase equilibrium mixture of H2, I2, and HI at 500. K, [HI] = 2.21 X 10^-3 mol.L-1 and [I2] = 1.46 X 10^-3 mol.L-1. Given the value of the equilibrium constant in Table 11.2, calculate the equilibrium concentration of H2. Are we expected to know this table for the upcoming tests? Than...
Tue Nov 21, 2017 4:53 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Homework 17.37
Replies: 1
Views: 137

### Homework 17.37

17.37 With the help of Table 17.4, determine the coordination number of the metal ion in each of the following complexes: (a) [NiCl4]2 ; (b) [Ag(NH3)2] ; (c) [PtCl2(en)2]2 ; (d) [Cr(edta)], I am confused about parts c and d of this question because I don't really understand what monodentate, bidenta...
Sun Nov 19, 2017 3:44 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming Coordination Compounds
Replies: 4
Views: 251

### Naming Coordination Compounds

[Ni(CN)4]2-

The name for this compound is tetracyanonickelate (II). Why do you write cyanide as cyano? When do you add "o" to the end of a name?

[Co(NH3)Cl]Cl * 2H2O

Additionally, are ammonia and chlorine (the one in the brackets) both ligands in the above example?
Sun Nov 19, 2017 3:30 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelates
Replies: 3
Views: 199

### Chelates

I'm still confused about what a chelate complex is and why they are important. Also, does anyone know of any examples of chelates?
Sun Nov 05, 2017 1:48 pm
Forum: Lewis Structures
Topic: Homework 3.99
Replies: 1
Views: 169

### Homework 3.99

In 1999, Karl Christe synthesized and characterized a salt that contained the N5 cation, in which the ve N atoms are connected in a long chain. This cation is the rst all-nitrogen species to be isolated in more than 100 years. Draw the most important Lewis structure for this ion, including all equiv...
Sun Nov 05, 2017 9:24 am
Forum: Resonance Structures
Topic: HW Problem 3.95
Replies: 1
Views: 164

### HW Problem 3.95

Question: Draw resonance structures for the trimethylenemethane anion C(CH2)32 in which a central carbon atom is attached to three CH2 groups (CH2 groups are referred to as methylene). I got the resonance structures correct, but in the solutions manual, one of the CH2's is written as "H2C"...
Thu Oct 26, 2017 10:36 am
Forum: Trends in The Periodic Table
Topic: HW 2.85
Replies: 1
Views: 141

### HW 2.85

2.85 In the heavier transition-metal elements, especially the lanthanoids and actinoids, there are numerous exceptions to the regular order of orbital occupation predicted by the building- up principle. Suggest why more exceptions would be noted for these elements. The solution manual gave a general...
Thu Oct 26, 2017 10:29 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW 2.55
Replies: 1
Views: 159

### HW 2.55

2.55 Give the notation for the valence-shell configuration (including the outermost d-electrons) of (a) the alkali metals; (b) Group 15 elements; (c) Group 5 transition metals; (d) “coinage” metals (Cu, Ag, Au). For part c, the answer is (n-1)d^5ns^2. How does the d orbital have five electrons? I kn...
Thu Oct 19, 2017 11:36 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Homework 2.29
Replies: 2
Views: 203

### Homework 2.29

2.29 How many electrons can have the following quantum numbers in an atom: (a) n=2, l=1; (b) n=4, l=2, ml=2; (c) n=2; (d) n=3, l=2, ml=1? For part c, I am confused as to why the answer is eight electrons. I understand that when n=2, there can be either s or p orbitals, but I don't see how the answer...
Thu Oct 19, 2017 11:24 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Models of Atoms- Question 2.31
Replies: 4
Views: 252

### Re: Models of Atoms- Question 2.31

Hi! I could also use some clarification about this problem. For part d, the solution manual says that 6f exists. However, looking at the periodic table I only see that there are s, p, and d orbitals when n=6. Does it exist because for n=6, the l values can be anywhere from 0 to 5, so theoretically, ...
Fri Oct 13, 2017 9:19 am
Forum: DeBroglie Equation
Topic: De Brogile Equation
Replies: 1
Views: 176

### De Brogile Equation

For certain problems in the chapter 1 homework, you have to use the De Brogile equation. For example, you are given velocity and mass, and you have to solve for wavelength. When this type of problem occurs, you use the equation (λ=h/mv). However, I don't understand how the units of Planck's constant...
Thu Oct 12, 2017 9:38 am
Forum: Properties of Light
Topic: HW 1.25b
Replies: 2
Views: 179

### HW 1.25b

Question: 1.25 Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by (b) 5.00 mg of sodium atoms emitting light at this wavelength; Is energy always measured in Joules per atom? You have to use dimensional analysis in this problem and I g...
Thu Oct 05, 2017 5:25 pm
Forum: Empirical & Molecular Formulas
Topic: L.39(b)
Replies: 4
Views: 267

### Re: L.39(b)

Thank you! So if it were, for example, Aluminum rather than Tin, how would that work?
Thu Oct 05, 2017 4:45 pm
Forum: Empirical & Molecular Formulas
Topic: L.39(b)
Replies: 4
Views: 267

### L.39(b)

Question: A 1.50-g sample of metallic tin was placed in a 26.45-g crucible and heated until all the tin had reacted with the oxygen in air to form an oxide. The crucible and product together were found to weigh 28.35 g. (a) What is the empirical formula of the oxide? (b) Write the name of the oxide....