Search found 30 matches

by Nimrat Brar 1E
Sun Jun 10, 2018 11:41 pm
Forum: Lewis Acids & Bases
Topic: Strong Acid
Replies: 8
Views: 379

Re: Strong Acid

A strong acid is based on the bond between the H+ part of the molecule, and the negative ion. So HCl is totally fine separating into H+ and Cl- which makes it a strong acid. When we measure pH, we are talking about the amount of H+/H3O+ (which is H+ + H2O -> H3O+). The greater a concentration of H3O...
by Nimrat Brar 1E
Sun Jun 10, 2018 11:39 pm
Forum: Lewis Acids & Bases
Topic: Ka
Replies: 5
Views: 275

Re: Ka

Ka (also known as acidity constant, or acid-ionization constant) is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for a chemical reaction known as dissociation in the context of acid–base reactions.
by Nimrat Brar 1E
Sun Jun 10, 2018 11:37 pm
Forum: Lewis Acids & Bases
Topic: Determining Acid Strength
Replies: 6
Views: 349

Re: Determining Acid Strength

I would recommend memorizing the 7 common strong acids, which are HCI, HBr, HI, HNO3, HCIO3, HCIO4, H2SO4 Are those acids already ranked from strongest to weakest? For example, HCl > HBr > HI ......? No, these strong acids go in the order of HI > HBr > HCl > HF. HI is the strongest acid.
by Nimrat Brar 1E
Sun Jun 03, 2018 3:29 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number vs. oxidation number [ENDORSED]
Replies: 4
Views: 344

Re: coordination number vs. oxidation number [ENDORSED]

This oxidation number is an indicator of the degree of oxidation (loss of electrons) of an atom in a chemical compound while the coordination number is the number of atoms or ions immediately surrounding a central atom in a complex or crystal.
by Nimrat Brar 1E
Sun Jun 03, 2018 3:10 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Define Ligands?
Replies: 10
Views: 316

Re: Define Ligands?

Ligands are molecules/ions (they must have a lone pair of electrons) that "bite" onto something with a high positive charge density (like a metal ion, such as Al(3+)).If you're having trouble with this concept, watching this youtube video really helped: https://youtu.be/011Bj5USal8
by Nimrat Brar 1E
Sun Jun 03, 2018 3:06 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Significance of Coordination Number?
Replies: 7
Views: 260

Re: Significance of Coordination Number?

The coordination number describes the number of neighbor atoms with respect to a central atom.
by Nimrat Brar 1E
Tue May 29, 2018 9:02 pm
Forum: Bond Lengths & Energies
Topic: Energies
Replies: 4
Views: 212

Re: Energies

Formal charge should be taken into consideration. When it comes to single bonds, you just need to take the formal charge for each of the elements in the molecule and use their electronegativities to determine which bond is stronger.
by Nimrat Brar 1E
Tue May 29, 2018 8:58 pm
Forum: Lewis Structures
Topic: Lewis Structures and Coordinate Covalent Bonds
Replies: 1
Views: 111

Lewis Structures and Coordinate Covalent Bonds

Do we ever need to be aware of coordinate covalent bonds when drawing lewis structures? Would it ever be associated with lewis structures in any aspect?
by Nimrat Brar 1E
Tue May 29, 2018 8:57 pm
Forum: Lewis Structures
Topic: Electrons in Valence Shell
Replies: 4
Views: 191

Electrons in Valence Shell

What's the maximum amount of electrons that an atom can accommodate on its valence shell (given that its able to expand valence shells)?
by Nimrat Brar 1E
Sun May 20, 2018 10:00 pm
Forum: Ionic & Covalent Bonds
Topic: How to tell which elements will be most likely to form a covalent bond
Replies: 8
Views: 249

Re: How to tell which elements will be most likely to form a covalent bond

If you're given a list of elements such as K and Cl H and O Al and Mg K and Na how do you tell which elements will most likely form a covalent bond? These are the bonds I got after doing the calculations, Please correct me if I am wrong! K and Cl=ionic bond H and O = covalent bond Al and Mg= covale...
by Nimrat Brar 1E
Sun May 20, 2018 9:55 pm
Forum: Ionic & Covalent Bonds
Topic: Polarization
Replies: 7
Views: 289

Re: Polarization

I also had a similar question and am just slightly confused over the concept of an ionic bond with a covalent character so if someone could explain that, it would be very helpful!
by Nimrat Brar 1E
Sun May 20, 2018 9:49 pm
Forum: Lewis Structures
Topic: Different ways to write the lewis structure?
Replies: 6
Views: 237

Re: Different ways to write the lewis structure?

I am fairly positive that the way you write it is okay because either way, you have the equal number of bonds and electrons.
by Nimrat Brar 1E
Thu May 10, 2018 2:13 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Clarification on magnetic quantum number
Replies: 6
Views: 230

Re: Clarification on magnetic quantum number

One way to think about it that helped me is that ml describes the orientation of different subshells. The s-orbital is shaped like just a sphere, so there is only one distinguishable way to orient it, indicating that there is only one ml, which is true. The p- orbital is like a three-dimensional in...
by Nimrat Brar 1E
Thu May 10, 2018 2:08 am
Forum: Trends in The Periodic Table
Topic: question
Replies: 6
Views: 287

Re: question

Electronegativity is a chemical property that says how well an atom can attract electrons towards itself while the electron affinity of an atom or molecule is defined as the amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion.
by Nimrat Brar 1E
Wed May 09, 2018 12:55 am
Forum: Trends in The Periodic Table
Topic: Electron Affinity Exceptions
Replies: 3
Views: 219

Re: Electron Affinity Exceptions

I was also wondering the same thing. Also, if we do need to know this, do we need to know which specific atoms have these exceptions or do we need to understand and be able to explain why there are specific electron affinity exceptions without having to know the specific ones?
by Nimrat Brar 1E
Wed May 02, 2018 3:42 pm
Forum: Significant Figures
Topic: Use of Appropriate Sig Figs
Replies: 2
Views: 231

Use of Appropriate Sig Figs

Just to ensure I have this right, if a question were to give us a molecule with 3 sig figs and another with 4 sig figs, the right amount of sig figs to write in the final part of this problem would be 3, correct?
by Nimrat Brar 1E
Wed May 02, 2018 3:38 pm
Forum: Significant Figures
Topic: Sig Fig Accuracy [ENDORSED]
Replies: 6
Views: 357

Re: Sig Fig Accuracy [ENDORSED]

If you were to round the number after every step, the level of accuracy of your final answer could be completely off because all the steps add up at the end.
by Nimrat Brar 1E
Wed May 02, 2018 12:18 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 127
Views: 74898

Re: Reading the textbook [ENDORSED]

what's the best way to learn the material for someone who's not so familiar with chemistry concepts? As someone who is also not very familiar with the chemistry concepts, I have found that watching the modules that Dr. Lavelle has posted online are extremely helpful. While watching them, I suggest ...
by Nimrat Brar 1E
Fri Apr 27, 2018 12:53 am
Forum: Photoelectric Effect
Topic: Photoelectric Effect Module Question [ENDORSED]
Replies: 5
Views: 275

Re: Photoelectric Effect Module Question [ENDORSED]

The incoming light is Ultraviolet according to the modules that Lavelle has posted.
by Nimrat Brar 1E
Fri Apr 27, 2018 12:51 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Cutoff for wavelike properties [ENDORSED]
Replies: 2
Views: 87

Cutoff for wavelike properties [ENDORSED]

What is the cutoff between measurable wavelike properties and non-measurable wavelike properties?
by Nimrat Brar 1E
Fri Apr 27, 2018 12:50 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Wave peak differences
Replies: 2
Views: 79

Wave peak differences

What happens when a peak of a wave is slightly off from another peak of a different wave. This would mean that the two peaks are somewhere right in between what could be referred to as a constructive interference and a destructive interference. Is there a distinct term for this?
by Nimrat Brar 1E
Wed Apr 18, 2018 12:39 pm
Forum: Photoelectric Effect
Topic: When to use Planck's Constant [ENDORSED]
Replies: 5
Views: 205

Re: When to use Planck's Constant [ENDORSED]

When calculating a photon's energy from its wavelength, you would use planck's constant. It is significant because it links the amount of energy a photon carries with the frequency of its electromagnetic wave.
by Nimrat Brar 1E
Wed Apr 18, 2018 12:34 pm
Forum: Properties of Electrons
Topic: History of experiments on the model of atom
Replies: 7
Views: 332

Re: History of experiments on the model of atom

I think with the tests and midterms for this class, we should be focusing on application based questions. So, making sure you know how to solve the specific problems we are being taught is a bigger priority than the history of the experiments on the model of an atom. I also do recall the professor m...
by Nimrat Brar 1E
Wed Apr 18, 2018 12:30 pm
Forum: Properties of Light
Topic: still don't uderrsatnd what a photon is [ENDORSED]
Replies: 20
Views: 411

Re: still don't uderrsatnd what a photon is [ENDORSED]

A photon is the basic unit of all light and the smallest discrete amount or quantum of electromagnetic radiation. It's the force carrier of the electromagnetic force. Additionally, photons are always in motion.
by Nimrat Brar 1E
Sun Apr 15, 2018 9:38 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: What do the coefficients/subscripts represent [ENDORSED]
Replies: 7
Views: 361

Re: What do the coefficients/subscripts represent [ENDORSED]

Coefficients represent the amount of molecules that are part of the equation so in your example, since there are 4 molecules of H20, there would be a total of 8 hydrogen atoms.
by Nimrat Brar 1E
Sun Apr 15, 2018 9:30 pm
Forum: Empirical & Molecular Formulas
Topic: Periodic Table Memorization [ENDORSED]
Replies: 8
Views: 398

Re: Periodic Table Memorization [ENDORSED]

Even though we do not have to memorize the periodic table, I prefer getting familiar with some of the more frequently used elements. Hope this helps!
by Nimrat Brar 1E
Sun Apr 15, 2018 9:22 pm
Forum: Balancing Chemical Reactions
Topic: Balancing the Equation
Replies: 9
Views: 411

Re: Balancing the Equation

I have tried multiple methods when trying to balance equations, but as some others have already stated. Guess and check is the best way because each balance equation is unique in how it is structured and there isn't one specific method that would work for all of them. It would be the most efficient ...
by Nimrat Brar 1E
Sun Apr 15, 2018 9:18 pm
Forum: SI Units, Unit Conversions
Topic: Correct Units?? [ENDORSED]
Replies: 8
Views: 312

Re: Correct Units?? [ENDORSED]

I believe normally, if no unit was already given, you would use grams. What I usually do is use the units provided with the initial amount and converting my answer to fit that.
by Nimrat Brar 1E
Sun Apr 15, 2018 9:15 pm
Forum: SI Units, Unit Conversions
Topic: writing out conversions in one long line vs. steps
Replies: 16
Views: 613

Re: writing out conversions in one long line vs. steps

I have always found it easier to writing out conversions in one long line because it is more straight forward in regards to being able to find everything you must cancel in order to get to your final answer. And this way, you do not have to refer back to the previous step as it should essentially be...
by Nimrat Brar 1E
Sun Apr 15, 2018 9:11 pm
Forum: SI Units, Unit Conversions
Topic: Units for Answer
Replies: 10
Views: 471

Re: Units for Answer

If a specific measurement isn't clearly asked for in the question, I believe you can leave it in grams.

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