Search found 30 matches

by Lucy Agnew 3E
Sat Dec 08, 2018 1:08 pm
Forum: Photoelectric Effect
Topic: Test 2 Q2c
Replies: 2
Views: 51

Re: Test 2 Q2c

Is someone able to share a picture or pdf of this question in test 2?
by Lucy Agnew 3E
Sat Dec 08, 2018 1:06 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH vs. pOH
Replies: 2
Views: 34

Re: pH vs. pOH

This can be further explained why you can do this equation in pages 457-458 of the textbook! IT shows you how it works
by Lucy Agnew 3E
Sat Dec 08, 2018 1:05 pm
Forum: Conjugate Acids & Bases
Topic: Strong acids and bases to memorize
Replies: 9
Views: 122

Re: Strong acids and bases to memorize

Was that list in the textbook? For strong acids?
by Lucy Agnew 3E
Sat Dec 01, 2018 9:13 am
Forum: Lewis Acids & Bases
Topic: solution of weak acids with higher pH
Replies: 4
Views: 193

Re: solution of weak acids with higher pH

less dissociation => less H30+ produced=> higher pH!
by Lucy Agnew 3E
Sat Dec 01, 2018 9:11 am
Forum: Ionic & Covalent Bonds
Topic: Intra vs Intermolecular forces
Replies: 9
Views: 212

Re: Intra vs Intermolecular forces

Intramolecular forces are harder to break! You are actually breaking a BOND rather than a force of attraction
by Lucy Agnew 3E
Sat Dec 01, 2018 9:10 am
Forum: Bronsted Acids & Bases
Topic: Memorizing Acids and Bases [ENDORSED]
Replies: 2
Views: 69

Re: Memorizing Acids and Bases [ENDORSED]

Also, usually you can tell if it is a bigger molecule and only dissociates partly e.g. CH3COOH, it will be a weaker base
by Lucy Agnew 3E
Wed Nov 21, 2018 3:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Electron pair arrangement, actual structure
Replies: 3
Views: 27

Re: Electron pair arrangement, actual structure

I think for this question it is best to just memorize the different shapes and whether it has one lone pair or two lone pairs etc.
by Lucy Agnew 3E
Wed Nov 21, 2018 3:57 pm
Forum: Hybridization
Topic: Hybridization
Replies: 6
Views: 54

Re: Hybridization

Another good tip
Single bond : sigma bond
Double bond: sigma and pi bond
Triple bond : sigma and two pi bonds
by Lucy Agnew 3E
Wed Nov 21, 2018 3:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: predicting dipole moments
Replies: 4
Views: 46

Re: predicting dipole moments

All of these answers are very helpful! Intermolecular interactions is a hard topic to grasp so these were very helpful!
by Lucy Agnew 3E
Fri Nov 16, 2018 5:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Repulsion Strength
Replies: 7
Views: 62

Re: Repulsion Strength

All of these are so helpful! I didn't even think to distinguish the qualitative model from the quantitative model!
by Lucy Agnew 3E
Fri Nov 16, 2018 5:23 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 6
Views: 125

Re: Resonance Structures

I was wondering if for resonance structures do you need to have the same element of atom surrounding the central atom? And can there be more than one double bond for resonance to occur? In all the examples we have looked at and some I have looked at online, there seems to be only one double bond in...
by Lucy Agnew 3E
Fri Nov 16, 2018 5:19 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Polar v. Non Polar
Replies: 7
Views: 117

Re: Polar v. Non Polar

I was wondering does polarity always have to do with the symmetry of the molecule or are there exceptions? I think symmetry plays a role in guessing whether the molecule is polar or not, but you also have to consider the electronegativities of the atom as this is really important. There are probabl...
by Lucy Agnew 3E
Fri Nov 09, 2018 1:13 pm
Forum: Octet Exceptions
Topic: Octet vs formal charge
Replies: 15
Views: 187

Re: Octet vs formal charge

All these answers were really helpful thank you!!
by Lucy Agnew 3E
Fri Nov 09, 2018 1:12 pm
Forum: Dipole Moments
Topic: Induced Dipole Meaning
Replies: 2
Views: 42

Re: Induced Dipole Meaning

I will try my best! Induced dipole means that when atoms of an element that are bonded together e.g F-F , because there will always be partial positive and partial negative charges going on within the element, one atom with partial charges can induce the atoms bonded around it to have partial charge...
by Lucy Agnew 3E
Fri Nov 09, 2018 1:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 13
Views: 136

Re: Bond Angles

Bond angles are caused by the laws of electron repulsion theory, and atoms that interact around a central atom they are all bonded to orientate themselves to produce the most stable structure
by Lucy Agnew 3E
Sun Nov 04, 2018 7:01 am
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation
Replies: 6
Views: 237

Re: Schrodinger's Equation

I didn't understand this concept at all so thanks for explaining it to me better!
by Lucy Agnew 3E
Sun Nov 04, 2018 6:59 am
Forum: Electronegativity
Topic: What are the trends useful for?
Replies: 12
Views: 108

Re: What are the trends useful for?

The trends are also useful to predict/determine where an element would be in the periodic table!
by Lucy Agnew 3E
Sun Nov 04, 2018 6:57 am
Forum: Lewis Structures
Topic: Cations and Anions
Replies: 3
Views: 38

Re: Cations and Anions

I always forget this so thank you for the explanation!
by Lucy Agnew 3E
Fri Oct 26, 2018 9:53 am
Forum: Significant Figures
Topic: When to round the answers to significant figures
Replies: 11
Views: 236

Re: When to round the answers to significant figures

I leave all the numbers not rounded until the end! That way it’s the most accurate answer!
by Lucy Agnew 3E
Fri Oct 26, 2018 9:53 am
Forum: Ionic & Covalent Bonds
Topic: Chemical Bonding
Replies: 8
Views: 98

Chemical Bonding

Did Lavelle say he was starting bonding today in class? And if so does anyone know how in depth we will go with the bonding?
by Lucy Agnew 3E
Fri Oct 26, 2018 9:51 am
Forum: General Rate Laws
Topic: Unique Reaction Rates [ENDORSED]
Replies: 27
Views: 27503

Re: Unique Reaction Rates [ENDORSED]

These explanations were very helpful! Totally forgot about this !
by Lucy Agnew 3E
Tue Oct 16, 2018 6:58 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Question 1.15 sixth edition
Replies: 10
Views: 110

Re: Question 1.15 sixth edition

Very helpful thank you! I got stuck on this problem too!
by Lucy Agnew 3E
Tue Oct 16, 2018 6:50 pm
Forum: Photoelectric Effect
Topic: Definition for photoelectric effect
Replies: 4
Views: 42

Definition for photoelectric effect

Does anyone have a good definition for the photoelectric effect? Thanks!
by Lucy Agnew 3E
Tue Oct 16, 2018 6:48 pm
Forum: DeBroglie Equation
Topic: Formulas
Replies: 5
Views: 50

Formulas

Has anyone got a way to remember formulas? Or will we get all the formulas we need on the exam
by Lucy Agnew 3E
Fri Oct 12, 2018 9:18 pm
Forum: Administrative Questions and Class Announcements
Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
Replies: 135
Views: 24323

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]

This is going to be so helpful! The more resources the better!
by Lucy Agnew 3E
Fri Oct 12, 2018 9:16 pm
Forum: Properties of Light
Topic: question from class today
Replies: 3
Views: 25

question from class today

Can anyone explain how Lavelle cancelled both the s and s^-2 to result in the only unit being m left over? If that makes sense haha!
Lucy Agnew
by Lucy Agnew 3E
Fri Oct 12, 2018 9:11 pm
Forum: DeBroglie Equation
Topic: Equations
Replies: 9
Views: 75

Equations

I know that we got all of the equations in the most recent test, but do we get all the equations and formulas in the midterms and finals? And to save time, does anyone have a fast way to remember them?

Thanks!
by Lucy Agnew 3E
Wed Oct 03, 2018 6:44 pm
Forum: Empirical & Molecular Formulas
Topic: Fundamental L.39
Replies: 6
Views: 66

Re: Fundamental L.39

@AlbertDuong Thank you for that explanation! Completely forgot how to do it and so that was very helpful
by Lucy Agnew 3E
Wed Oct 03, 2018 6:39 pm
Forum: Molarity, Solutions, Dilutions
Topic: If we ever have to use dm^3
Replies: 1
Views: 30

If we ever have to use dm^3

I used dm^3 alot when I was doing A level chemistry; is what we use for dm^3 just the same as 1000cm^3? I was just confused as it hadn't come up yet
by Lucy Agnew 3E
Wed Oct 03, 2018 6:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 95
Views: 26014

Re: Advice from a Medical Student [ENDORSED]

Thank you so much for this! Very in-depth explanations of what we need to do to succeed!

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