CHEMISTRY COMMUNITY

Hannah Padilla 1H

This questions asks us to identify the stronger acid, and in part c it lists HBrO2 and HClO2. I thought it was HBrO2 because Br is larger than Cl and therefore has a weaker bond, but the answer key says HClO2 is stronger and I do not understand why. .

Hannah Padilla 1H

A Lewis acid accepts electrons and a Lewis base donates electrons. A Bronsted acid donates protons and a Bronsted base accepts protons.

Hannah Padilla 1H

The coordination number is how many atoms/ligand are bonded to the central compound.

Hannah Padilla 1H

How will we know if a molecule is going to be a radical?

Hannah Padilla 1H

Arrangement is solely based on the regions of electron density. The shape is only based on the location of the atoms

Hannah Padilla 1H

Can someone explain to me how to find the oxidation number? Thank you!

Hannah Padilla 1H

I believe that the test covers the end of bonding, VSEPR models, and hybridization.

Hannah Padilla 1H

Yes, order only matter for electron figuration, not hybridization

Hannah Padilla 1H

However, the the bonds are polar, and the either the atoms are arranged symmetrically or in another way that the dipole forces cancel out, then the molecule is considered nonpolar.

Hannah Padilla 1H

You should memorize them! We will need to know them by memory for the test, as the VSEPR models are not inc.uded on the constants and equations sheet.

Hannah Padilla 1H

I don't think that attractive energy determines the structure of the entire molecule. Attractive energy refers to the strength of the bond. Hydrogen bonds are stronger than Van der Waals but weaker than covalent.

Hannah Padilla 1H

I think anything from bonding.

Hannah Padilla 1H

I know that for Ionization energy, electronegativity, and electron affinity the trend is that it increases towards the upper right corner (He). However, how would you determine which atom is more electronegative if there are diagonal (like Na and Ca)

Hannah Padilla 1H

The difference in electronegativity is what determines an ionic bond. Professor Lavelle said that the difference in electronegativity would approximately be 2 in order for it to be an ionic bond. Any less would be a covalent bond.

Hannah Padilla 1H

The second review discussion talked about quantum numbers and periodic trends. It was pretty much similar to what we already learned in class.

Hannah Padilla 1H

I know that certain elements can have more than an octet, but in which form are they more stable.

Hannah Padilla 1H

The d orbital can hold 10 electrons because it has 5 orbitals

Hannah Padilla 1H

If you get confused, I find that reading through the chapter in the book helps, as well as watching outside videos. However, if you keep practicing the problems, it will become fairly easy which formulas to use.

Hannah Padilla 1H

Degenrate simply means same energy. With Hydrogen, all orbitals of the shell have the same energy, even if the orbital angular momentum value is different.

Hannah Padilla 1H

For some of the homework problems (1.37 in the 6th edition), it implied that we should already know the mass of an electron, proton, and/or neutron. Is this something I should memorize or will it be given to us?

Hannah Padilla 1H

An Angstrom is the diameter of 1 Hydrogen atom, or 10^-10. We use this, because SI units go by 3s.

Hannah Padilla 1H

Also, in the types of problems that do not specifically as for the DeBroglie Equation, how do you know to use it?

Hannah Padilla 1H

Since electron energies are quantized (they can only be certain numbers, and not continuous), then their energy levels reflect that

Hannah Padilla 1H

For the first test, will we need to be able to identify molecular formulas from their written name? For example in problem F3.) “Write the formula for nitric acid”

Hannah Padilla 1H

For the test, do we need to show each step of the problem? Are points given from showing work?

Hannah Padilla 1H

In the homework problem G5 says “a student prepared a solution on sodium carbonate by adding 2.11 g of a solid to a 250 mL volumetric flask and adding water to the mark. Some of the solution was transferred to a buret. What Volume of the solution should the student transfer into a flask to obtain (a...

Hannah Padilla 1H

It is highly unlikely there will be two limiting reactants

Hannah Padilla 1H

Thank you this was so helpful!!

Hannah Padilla 1H

Hello! I was working on the limiting reactants post-module assessment and I got confused about this problem: 20. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is: CaCO3(s) + H2SO4(aq) ---> CaSO...

CHEMISTRY COMMUNITY

Search found 29 matches

Chapter 12.51

Re: Acid vs base [ENDORSED]

Re: Coordination Number

Re: Radicals

Re: Determining Shape

Oxidation number

Re: Test 3

Re: Just Kind of Confused

Re: Dipole-Dipole forces

Re: Test 3

Re: Hydrogen Bonding

Re: HW for discussion

Periodic Trends

Re: Covalent or ionic?

Re: Midterm Review Sessions

Octet exceptions

Re: D orbital

Re: Quantum Test

Re: Degeneracy

Mass of electrons

Re: Angstrom?

Re: DeBroglie Equation

Re: Electron Question

Re: Quiz 1- Addition to what we should know?

Test 1

Homework problem G5

Re: multiple limiting reactants

Re: Advice from a Medical Student [ENDORSED]

Limiting Reactants Post- Module