CHEMISTRY COMMUNITY

Nimrat Brar 1E

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...

Nimrat Brar 1E

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.

Nimrat Brar 1E

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.

Nimrat Brar 1E

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.

Nimrat Brar 1E

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

Nimrat Brar 1E

The coordination number describes the number of neighbor atoms with respect to a central atom.

Nimrat Brar 1E

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.

Nimrat Brar 1E

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?

Nimrat Brar 1E

What's the maximum amount of electrons that an atom can accommodate on its valence shell (given that its able to expand valence shells)?

Nimrat Brar 1E

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...

Nimrat Brar 1E

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!

Nimrat Brar 1E

I am fairly positive that the way you write it is okay because either way, you have the equal number of bonds and electrons.

Nimrat Brar 1E

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...

Nimrat Brar 1E

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.

Nimrat Brar 1E

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?

Nimrat Brar 1E

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?

Nimrat Brar 1E

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.

Nimrat Brar 1E

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 ...

Nimrat Brar 1E

The incoming light is Ultraviolet according to the modules that Lavelle has posted.

Nimrat Brar 1E

What is the cutoff between measurable wavelike properties and non-measurable wavelike properties?

Nimrat Brar 1E

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?

Nimrat Brar 1E

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.

Nimrat Brar 1E

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...

Nimrat Brar 1E

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.

Nimrat Brar 1E

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.

Nimrat Brar 1E

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!

Nimrat Brar 1E

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 ...

Nimrat Brar 1E

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.

Nimrat Brar 1E

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...

Nimrat Brar 1E

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

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Strong Acid

Re: Ka

Re: Determining Acid Strength

Re: coordination number vs. oxidation number [ENDORSED]

Re: Define Ligands?

Re: Significance of Coordination Number?

Re: Energies

Lewis Structures and Coordinate Covalent Bonds

Electrons in Valence Shell

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

Re: Polarization

Re: Different ways to write the lewis structure?

Re: Clarification on magnetic quantum number

Re: question

Re: Electron Affinity Exceptions

Use of Appropriate Sig Figs

Re: Sig Fig Accuracy [ENDORSED]

Re: Reading the textbook

Re: Photoelectric Effect Module Question [ENDORSED]

Cutoff for wavelike properties [ENDORSED]

Wave peak differences

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

Re: History of experiments on the model of atom

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

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

Re: Periodic Table Memorization [ENDORSED]

Re: Balancing the Equation

Re: Correct Units?? [ENDORSED]

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

Re: Units for Answer