Search found 31 matches

by Corryn Doll
Thu Jun 14, 2018 10:33 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Predicting polarizability and polarizing power
Replies: 5
Views: 396

Predicting polarizability and polarizing power

How would I go about predicting the polarizability of Anions and the polarizing power of Cations? Is there a periodic trend which can be used to predict such things, or another way?
by Corryn Doll
Thu Jun 14, 2018 10:25 am
Forum: Biological Examples
Topic: Biological functions of coordinate compounds
Replies: 1
Views: 153

Biological functions of coordinate compounds

The book says that much research focuses around coordinate compounds "...partly because they participate in many biological reactions," but doesn"t exactly describe the biological functions of those naturally occurring coordinate compounds. So what are some of the biological functions...
by Corryn Doll
Thu Jun 14, 2018 10:22 am
Forum: Air Pollution & Acid Rain
Topic: Reducing Acid Rain
Replies: 4
Views: 298

Reducing Acid Rain

What are some possible options that could help reduce "acid rain"?
by Corryn Doll
Thu Jun 14, 2018 10:21 am
Forum: Air Pollution & Acid Rain
Topic: Acid Rain
Replies: 13
Views: 1001

Acid Rain

What exactly causes acidic rain to form? Why is it possible for rain to be acidic?
by Corryn Doll
Thu Jun 14, 2018 10:19 am
Forum: Air Pollution & Acid Rain
Topic: Carbon Dioxide and respiratory acidosis
Replies: 3
Views: 372

Carbon Dioxide and respiratory acidosis

How can carbon dioxide lead to respiratory acidosis?
by Corryn Doll
Thu Jun 14, 2018 10:17 am
Forum: Lewis Acids & Bases
Topic: Salts of weak bases producing acidic solutions
Replies: 1
Views: 197

Salts of weak bases producing acidic solutions

Why do salts of weak bases produce acidic solutions?
Why do salts of weak acids produce basic solutions?
by Corryn Doll
Thu Jun 14, 2018 10:14 am
Forum: Lewis Acids & Bases
Topic: solution of weak acids with higher pH
Replies: 4
Views: 257

solution of weak acids with higher pH

Why do solutions of weak acids have a higher pH value than solutions of strong acids at the same concentration?
by Corryn Doll
Thu Jun 14, 2018 10:09 am
Forum: Ionic & Covalent Bonds
Topic: Describing parameters contributing to intermolecular energy
Replies: 1
Views: 87

Describing parameters contributing to intermolecular energy

Could someone explain to me a little more about what each parameter is and how it contributes to the overall intermolecular energy from the equation (E proportional to (a1-a2)/r^u)?

Thanks
by Corryn Doll
Thu Jun 14, 2018 10:05 am
Forum: Ionic & Covalent Bonds
Topic: Examples of intermolecular forces and hydrogen bonding
Replies: 1
Views: 92

Examples of intermolecular forces and hydrogen bonding

What are some examples of intermolecular forces and hydrogen bonding in organic and biological molecules?
by Corryn Doll
Thu Jun 14, 2018 10:03 am
Forum: Ionic & Covalent Bonds
Topic: Relations between Covalent bond dissociation energy
Replies: 1
Views: 108

Relations between Covalent bond dissociation energy

How is covalent bond dissociation energy related to covalent bond multiplicity, atomic radius, and the presence of unpaired electrons?
by Corryn Doll
Thu Jun 14, 2018 9:58 am
Forum: Dipole Moments
Topic: Intermolecular forces
Replies: 2
Views: 176

Intermolecular forces

Can someone explain intermolecular forces a bit more to me please?
by Corryn Doll
Thu Jun 14, 2018 9:56 am
Forum: Biological Examples
Topic: coordinate compounds as chemotherapy drugs
Replies: 1
Views: 365

coordinate compounds as chemotherapy drugs

What are some well-known examples of coordinate compounds that are used as chemotherapy drugs and why specifically do they use coordinate compounds?
by Corryn Doll
Thu Jun 14, 2018 12:05 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining if ligands can be polydentate.
Replies: 1
Views: 188

Determining if ligands can be polydentate.

I understand that some ligands can be polydentate, or occupy more than one binding site simultaneously, however im not quite sure how to go about determining which ligands can be polydentate. Could someone help me out?

Thanks.
by Corryn Doll
Wed Jun 13, 2018 11:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Calculation Oxidatin Number
Replies: 1
Views: 152

Calculation Oxidatin Number

Im having a hard time calculating the oxidation number of metals as im not quite sure what the charges of d-block metals are and anything I have tried to look up says the charges can vary. So how do I figure out the oxidation number?
by Corryn Doll
Wed May 30, 2018 6:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Resonance structure effect on molecular shape
Replies: 3
Views: 143

Re: Resonance structure effect on molecular shape

No. Because the resonance structures include moving around double bonds, and double bonds are counted as one bond pair in the VSEPR model, then the molecular shape of each should be the same.
by Corryn Doll
Wed May 30, 2018 6:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW 4.9
Replies: 10
Views: 571

Re: HW 4.9

due to there being 5 bonding pairs, it would seem as though the shape would result in a triagonal bipyramidal, however, when looking at the VSEPR formula AX3E2, we find that the shape is really T-shaped. If your not sure about the shape of something, make it a habit to always check the VSEPR model. ...
by Corryn Doll
Wed May 16, 2018 10:14 pm
Forum: Bond Lengths & Energies
Topic: Double Bond vs Triple Bond
Replies: 7
Views: 634

Re: Double Bond vs Triple Bond

In some cases the available valence electrons will only allow for a triple bond and lone pairs in order for all valence electrons to be used AND for each atom to have a full octet. For example, in drawing the Lewis Structure of NO+ (3.49 a.) : the valence electrons= -N=5 valence electrons -O=6 valen...
by Corryn Doll
Wed May 16, 2018 10:06 pm
Forum: Lewis Structures
Topic: Central atom
Replies: 7
Views: 258

Re: Central atom

The central atom will always be the one with the lowest ionization energy. To find this, you can look on the periodic table at were each atom lies. The ionization energy increases across a period and decreases down a group. Thus you want to look for the atom that is furthest to the left and closest ...
by Corryn Doll
Wed May 16, 2018 9:57 pm
Forum: Bond Lengths & Energies
Topic: test 3 [ENDORSED]
Replies: 3
Views: 156

Re: test 3 [ENDORSED]

Yes. The test is on Chapter 3, so I would ensure you know how to do all the problems from the homework from Outline 3, Chapter 3. If you can do these, you should be ready for the Quiz.

Hope this helped!! :)
by Corryn Doll
Wed May 16, 2018 9:54 pm
Forum: Lewis Structures
Topic: 3.49 a and c
Replies: 1
Views: 66

Re: 3.49 a and c

In both cases you have a two atoms bonding together with 10 available valence electrons, thus the only way for both to have a proper octet is for a triple bond to occur between them. For example, in A) when calculating valence electrons we get: -N=5 valence electrons -O=6 valence electrons -charge= ...
by Corryn Doll
Wed May 16, 2018 9:46 pm
Forum: Ionic & Covalent Bonds
Topic: Naming Molecules
Replies: 5
Views: 127

Re: Naming Molecules

For questions like 3.39, I believe both the Professor and TA (mine at least) have said that they do not require us to know chemical formulas based on names, especially since we have not covered this in class. If a question like this were to be on the test, they woud more than likely provide the name...
by Corryn Doll
Wed May 16, 2018 9:40 pm
Forum: Ionic & Covalent Bonds
Topic: Bonds between 1.5 and 2 [ENDORSED]
Replies: 5
Views: 193

Re: Bonds between 1.5 and 2 [ENDORSED]

The bond is ionic for metals because an ionic bond is formed by two oppositely charged ions and their attraction to one another. Ionic bonds form between a cation (which is generally a metal) and an anion (which is generally not a metal). The bond is polar/covalent for non-metals because it occurs t...
by Corryn Doll
Wed May 16, 2018 9:33 pm
Forum: Formal Charge and Oxidation Numbers
Topic: 3.49
Replies: 3
Views: 172

Re: 3.49

Yes, it is because then N would not have its octet. Because N has 5 valence electrons and O has 4 and there is a + (meaning - 1 electron), 10 valence electrons are available when building the Lewis structure. Because there are only two (N and O), the only way both may have a filled octet with the 10...
by Corryn Doll
Wed May 16, 2018 6:26 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Homework 3.25
Replies: 2
Views: 158

Re: Homework 3.25

I was having trouble with this too, but i found a website that helped and Ill do my best to explain it in a way that will help. heres the link: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/names-and-formulas-of-ionic-compounds/a/naming-monatomic-ions-and-ionic-compou...
by Corryn Doll
Sun Apr 15, 2018 11:06 pm
Forum: Empirical & Molecular Formulas
Topic: Quiz 1 Last Question Help [ENDORSED]
Replies: 3
Views: 284

Re: Quiz 1 Last Question Help [ENDORSED]

One more thing. If you write out your molecular formula and find that it cannot be reduced as a ratio any more than you can write the same for the empirical formula as they can be the same.
by Corryn Doll
Sun Apr 15, 2018 11:04 pm
Forum: Empirical & Molecular Formulas
Topic: Quiz 1 Last Question Help [ENDORSED]
Replies: 3
Views: 284

Re: Quiz 1 Last Question Help [ENDORSED]

So to do these problems it is easiest to find the molecular formula first by counting the amount of atoms of each element and writing the formula out from that. Because the molecular formula is the formula that contains the actual number of the atoms, it can be created simply by counting the number ...
by Corryn Doll
Sun Apr 15, 2018 10:57 pm
Forum: Properties of Light
Topic: Wavelength
Replies: 3
Views: 133

Re: Wavelength

Yes, they are essentially equivalent. Just different vocabulary for a different topic, but as far as i can tell they are synonymous.
by Corryn Doll
Sun Apr 15, 2018 10:55 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Isotopes [ENDORSED]
Replies: 12
Views: 418

Re: Isotopes [ENDORSED]

Isotopes are forms of the same element which have the same number of protons, but a different number of neutrons, thus giving a varying atomic mass, while the chemical properties of the element remain the same.

Hope this helps.
by Corryn Doll
Sun Apr 15, 2018 10:52 pm
Forum: Properties of Light
Topic: Wavelength [ENDORSED]
Replies: 9
Views: 341

Re: Wavelength [ENDORSED]

No. Wavelength does not have to be peak to peak, but it does have to be from one specific point on the wave to that same point on the next one. To be more clear it is easier to see how many cycles of waves there are within the time frame by looking at the peak-to-peak distance. However, be careful a...
by Corryn Doll
Sun Apr 15, 2018 10:40 pm
Forum: Properties of Light
Topic: Equations in Quantum
Replies: 2
Views: 92

Re: Equations in Quantum

I believe he was meaning to convey the sense that equations in Quantum mechanics have specific units that are consistently used making it so that the answer given is always of a specific magnitude. In class he gave the example of the energy of an electron in the hydrogen atom. He explained that the ...
by Corryn Doll
Sun Apr 15, 2018 10:31 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular to Empirical
Replies: 9
Views: 405

Re: Molecular to Empirical

For this specific structure, both the empirical and molecular formulas are going to be the same as the empirical formula represents the smallest ratio of each element needed. If you were to change it as you did, then you would in fact be writing an equation for a different structure entirely.

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