Search found 35 matches

by anishathomas
Wed Dec 05, 2018 11:09 am
Forum: Naming
Topic: Anionic ligands
Replies: 5
Views: 102

Re: Anionic ligands

We use this for naming coordinate compounds. This is correct as it is the new version, but both versions can be used.
by anishathomas
Wed Dec 05, 2018 11:07 am
Forum: Naming
Topic: naming differences
Replies: 6
Views: 116

Re: naming differences

The difference between chloro and chlorido is that one is the new accepted suffix. Both do mean technically the same thing, its just one is more recent than the other.
by anishathomas
Wed Dec 05, 2018 11:03 am
Forum: Amphoteric Compounds
Topic: Amphoteric clarification
Replies: 5
Views: 108

Re: Amphoteric clarification

Yes. One amphoteric molecule could be H20 but that still can't act both as a base or acid. It depends whether the other molecule reacting with water is more basic or acidic.
by anishathomas
Wed Dec 05, 2018 11:01 am
Forum: Bronsted Acids & Bases
Topic: How to identify Acids/Bases
Replies: 4
Views: 85

Re: How to identify Acids/Bases

Based on whether the molecule or atom gives off or wants to gain a H plus can help you determine whether it is more acidic or basic. Also if you think about the conjugate base or acid, and its relative strengths, that can help too.
by anishathomas
Wed Dec 05, 2018 10:59 am
Forum: Naming
Topic: Transition Metal
Replies: 4
Views: 59

Re: Transition Metal

I think that for our purpose we can only be working with one transitional metal because we are working on the ligands attached to one TM .
by anishathomas
Wed Dec 05, 2018 10:53 am
Forum: Bronsted Acids & Bases
Topic: Ka Formula
Replies: 6
Views: 117

Re: Ka Formula

You should probably know the formula just to understand that higher concentration in the forward reaction(in products) will lead to a higher Ka, meaning a stronger acid, lower ph.
by anishathomas
Wed Dec 05, 2018 10:49 am
Forum: Lewis Acids & Bases
Topic: Resonance in acids
Replies: 3
Views: 87

Re: Resonance in acids

If there is resonance than this increases the stability of the molecule. Therefore, due to resonance and delocalization of the electrons, the more readily the molecule will give off H+ and be a stronger acid.
by anishathomas
Wed Dec 05, 2018 10:47 am
Forum: Lewis Acids & Bases
Topic: Resonance Structures
Replies: 4
Views: 81

Re: Resonance Structures

If the acidic structure has resonance that means that it is usually stronger because it is able to find the most stable form of that molecule due to delocalization and readily give off H+.
by anishathomas
Fri Nov 30, 2018 11:28 am
Forum: Electronegativity
Topic: 7th Edition 3F.15
Replies: 2
Views: 164

Re: 7th Edition 3F.15

The dipole moments in AsF5 cancel out whereas there is a lone pair in AsF3 creating polarity. Higher polarity and more imf due to this would create a higher boiling point.
by anishathomas
Fri Nov 30, 2018 11:26 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Square Planar
Replies: 12
Views: 193

Re: Square Planar

Yes the angles would just be 90 due it having the vsepr formula AX4E2 and the molecular arrangement with the electrons opposite from each other, and therefore somewhat cancelling the repulsion related by the other.
by anishathomas
Fri Nov 30, 2018 11:20 am
Forum: Lewis Acids & Bases
Topic: Lewis acid and base
Replies: 5
Views: 105

Re: Lewis acid and base

We need to know how they relate to coordinate atoms, how they are electron pair donors or acceptors, and examples of some common ones.
by anishathomas
Fri Nov 23, 2018 4:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity
Replies: 7
Views: 107

Re: Polarity

Dipole moments are basically when the atoms that are drawn have differences in electronegativity. If you want to see if a molecule is polar, look at the overall structure. Sometimes there could be polar bonds but the structure's dipole moments could cancel each other out, and therefore be nonpolar.
by anishathomas
Fri Nov 23, 2018 4:52 pm
Forum: Hybridization
Topic: when to use hybridization
Replies: 4
Views: 78

Re: when to use hybridization

If the question asks what is the hybridization of the overall molecule or the specific atom, then you would be required to use hybridization.
by anishathomas
Fri Nov 23, 2018 4:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing Structures on Test
Replies: 11
Views: 160

Re: Drawing Structures on Test

No, as long as you have the basic structure down and don't add things that don't need to be there you should be fine.
by anishathomas
Wed Nov 14, 2018 9:22 pm
Forum: Lewis Structures
Topic: Boron Trifluoride
Replies: 8
Views: 153

Re: Boron Trifluoride

Boron is one of the examples of elements that can have expanded octects. Also those that are 2p and lower can have expanded octects.
by anishathomas
Wed Nov 14, 2018 9:21 pm
Forum: Bond Lengths & Energies
Topic: Bond Length
Replies: 9
Views: 194

Re: Bond Length

It would be the average of the lengths given for the resonance structures.
by anishathomas
Wed Nov 14, 2018 9:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 8
Views: 123

Re: Bond Angles

I think for most of them you just have to memorize it for the fastest way on an exam. However it will help to realize that when there are lone pairs, that will affect the bond angles. For exme, if there are four areas of electron densities, but one of them is occupied by lone pirs, and sy the shape ...
by anishathomas
Wed Nov 07, 2018 12:18 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical formula from compound name
Replies: 2
Views: 65

Re: Chemical formula from compound name

When you have Roman numerals it means you’re dealing with transitional metals. You are denoting the charge of that transitional metal.
by anishathomas
Wed Nov 07, 2018 12:16 pm
Forum: Properties of Light
Topic: Exam 2 Question 4A
Replies: 6
Views: 285

Re: Exam 2 Question 4A

You have to use e=hv as thst is the energy of the photon. Since you have the energy already you just have to solve for frequency as h is already given.
by anishathomas
Wed Nov 07, 2018 12:14 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 7
Views: 175

Re: Formal Charge

There are some instantances where formal charge does not equal zero. It would be preferable if the central atom has one of zero, but if it isn’t and you made sure that you have drawn the Lewis structure with the lowest energy,and you still have a formal charge of negative one, then it can happen
by anishathomas
Thu Nov 01, 2018 12:33 am
Forum: Formal Charge and Oxidation Numbers
Topic: Formal CHarge
Replies: 5
Views: 135

Re: Formal CHarge

It would be nice if the formal charges equal zero but sometimes it’s not so it would be the lowest amount for the formal charge.
by anishathomas
Thu Nov 01, 2018 12:28 am
Forum: General Science Questions
Topic: Calculator for midterm
Replies: 4
Views: 162

Re: Calculator for midterm

I would ask your ra they usually know where you can rent them out
by anishathomas
Thu Nov 01, 2018 12:27 am
Forum: Lewis Structures
Topic: Central Atom
Replies: 13
Views: 219

Re: Central Atom

You look for which one of the elements have lower ionization energies. Also you can usually rule out hydrogen as it tends to never be in the middle. Ionization energy increases across and period and decreases as you go down a group
by anishathomas
Mon Oct 22, 2018 11:11 pm
Forum: Quantum Numbers and The H-Atom
Topic: Magnetic Quantum Number
Replies: 3
Views: 75

Re: Magnetic Quantum Number

With magnetic quantum number you can know more about the orbitals within the subshells.
by anishathomas
Mon Oct 22, 2018 11:10 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Formula confusion
Replies: 5
Views: 60

Re: Formula confusion

I used h as the same value for both questions-and it worked. Just make sure you use h/4pi instead of h/2pi instead of the different value of h.
by anishathomas
Mon Oct 22, 2018 11:06 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Frequency Condition
Replies: 2
Views: 74

Re: Frequency Condition

You can use the second equation for sure. The second one is easier to use because it can help find the frequency or use a frequency you already found to use in the formula.
by anishathomas
Thu Oct 18, 2018 7:11 pm
Forum: Properties of Light
Topic: Wavelength and frequency proportions [ENDORSED]
Replies: 5
Views: 150

Re: Wavelength and frequency proportions [ENDORSED]

When wavelength gets bigger, the frequency decreases. If you look at the equation v=f(lambda) and we know that there is constant speed(at least in the same medium) then we know that if one increases, the other has to decrease. Therefore, it is an indirect relationship.
by anishathomas
Thu Oct 18, 2018 7:07 pm
Forum: DeBroglie Equation
Topic: wave property
Replies: 4
Views: 86

Re: wave property

Yeah photon's have zero mass and therefore you can't use that equation. Instead, you use the momentum to figure out the wavelength.
by anishathomas
Thu Oct 18, 2018 7:04 pm
Forum: Photoelectric Effect
Topic: units
Replies: 12
Views: 217

Re: units

Unless specified always stick with meters. It's just easier in the long run especially when using a specific formula.
by anishathomas
Thu Oct 11, 2018 11:17 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: En= -hR/n^2
Replies: 3
Views: 79

Re: En= -hR/n^2

I think that there must be different equations because it shows on my notes that it works only for the H spectrum.
by anishathomas
Thu Oct 11, 2018 11:09 am
Forum: Limiting Reactant Calculations
Topic: How to determine the limiting reactant???? [ENDORSED]
Replies: 8
Views: 952

Re: How to determine the limiting reactant???? [ENDORSED]

The way I calculate the limiting reactant is by first finding the amount of moles are in the reactants given. Once you find the moles, only convert one of them to the moles of the other reactant. For example, if you had a equation of 2h2+2o2----2h202 find the moles of h2 through o2 by multiplying th...
by anishathomas
Thu Oct 11, 2018 11:04 am
Forum: Limiting Reactant Calculations
Topic: Test 1
Replies: 8
Views: 449

Re: Test 1

This test was just a review of the fundamentals of chemistry in high school. If you did the modules and understood some of the intermediate level questions of the textbooks you should be fine. There was no long step equations that you should worry about(I would still do them just to test where you a...
by anishathomas
Tue Oct 02, 2018 2:34 pm
Forum: SI Units, Unit Conversions
Topic: Audio-Visual Focus-Topics, Assessments & Surveys
Replies: 10
Views: 263

Re: Audio-Visual Focus-Topics, Assessments & Surveys

Hi it says required on the website but I think the actual homework that is due is the seven problems. The modules will probably help greatly for the coming tests though.
by anishathomas
Tue Oct 02, 2018 2:27 pm
Forum: Significant Figures
Topic: Mass Percent Composition
Replies: 4
Views: 91

Re: Mass Percent Composition

Hi yeah you just have to use the least amount of sig figs and I usually wait till the end to do so just because it’s less of a hassle doing it in between problems. However there are different rules between multiplying numbers and finding dog figs than if you were adding numbers which I would just re...
by anishathomas
Tue Oct 02, 2018 2:00 pm
Forum: Empirical & Molecular Formulas
Topic: Determining the Number of Atoms for the Empirical Formula
Replies: 2
Views: 80

Re: Determining the Number of Atoms for the Empirical Formula

Yeah if it’s very close to a whole number you don’t have to worry about it. 4.03 is close enough to 4!

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