Search found 29 matches

by Hannah Padilla 1H
Fri Dec 07, 2018 9:23 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Chapter 12.51
Replies: 1
Views: 36

Chapter 12.51

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. .
by Hannah Padilla 1H
Sun Dec 02, 2018 1:06 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid vs base [ENDORSED]
Replies: 15
Views: 193

Re: Acid vs base [ENDORSED]

A Lewis acid accepts electrons and a Lewis base donates electrons. A Bronsted acid donates protons and a Bronsted base accepts protons.
by Hannah Padilla 1H
Sun Dec 02, 2018 1:03 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 10
Views: 92

Re: Coordination Number

The coordination number is how many atoms/ligand are bonded to the central compound.
by Hannah Padilla 1H
Mon Nov 26, 2018 4:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Radicals
Replies: 4
Views: 58

Re: Radicals

How will we know if a molecule is going to be a radical?
by Hannah Padilla 1H
Mon Nov 26, 2018 4:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Shape
Replies: 4
Views: 57

Re: Determining Shape

Arrangement is solely based on the regions of electron density. The shape is only based on the location of the atoms
by Hannah Padilla 1H
Mon Nov 26, 2018 4:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation number
Replies: 9
Views: 95

Oxidation number

Can someone explain to me how to find the oxidation number? Thank you!
by Hannah Padilla 1H
Mon Nov 26, 2018 4:21 pm
Forum: Hybridization
Topic: Test 3
Replies: 13
Views: 162

Re: Test 3

I believe that the test covers the end of bonding, VSEPR models, and hybridization.
by Hannah Padilla 1H
Mon Nov 26, 2018 4:20 pm
Forum: Hybridization
Topic: Just Kind of Confused
Replies: 13
Views: 116

Re: Just Kind of Confused

Yes, order only matter for electron figuration, not hybridization
by Hannah Padilla 1H
Sun Nov 18, 2018 10:30 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Dipole-Dipole forces
Replies: 4
Views: 57

Re: Dipole-Dipole forces

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.
by Hannah Padilla 1H
Sun Nov 18, 2018 10:28 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 19
Views: 245

Re: Test 3

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.
by Hannah Padilla 1H
Sun Nov 18, 2018 10:27 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Hydrogen Bonding
Replies: 7
Views: 91

Re: Hydrogen Bonding

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.
by Hannah Padilla 1H
Thu Nov 08, 2018 10:06 am
Forum: Determining Molecular Shape (VSEPR)
Topic: HW for discussion
Replies: 9
Views: 186

Re: HW for discussion

I think anything from bonding.
by Hannah Padilla 1H
Thu Nov 08, 2018 10:05 am
Forum: Ionic & Covalent Bonds
Topic: Periodic Trends
Replies: 3
Views: 64

Periodic Trends

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)
by Hannah Padilla 1H
Thu Nov 08, 2018 10:01 am
Forum: Ionic & Covalent Bonds
Topic: Covalent or ionic?
Replies: 4
Views: 88

Re: Covalent or ionic?

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.
by Hannah Padilla 1H
Wed Oct 31, 2018 1:20 pm
Forum: Student Social/Study Group
Topic: Midterm Review Sessions
Replies: 4
Views: 175

Re: Midterm Review Sessions

The second review discussion talked about quantum numbers and periodic trends. It was pretty much similar to what we already learned in class.
by Hannah Padilla 1H
Wed Oct 31, 2018 1:17 pm
Forum: Lewis Structures
Topic: Octet exceptions
Replies: 2
Views: 93

Octet exceptions

I know that certain elements can have more than an octet, but in which form are they more stable.
by Hannah Padilla 1H
Wed Oct 31, 2018 1:15 pm
Forum: Lewis Structures
Topic: D orbital
Replies: 4
Views: 94

Re: D orbital

The d orbital can hold 10 electrons because it has 5 orbitals
by Hannah Padilla 1H
Wed Oct 24, 2018 6:49 pm
Forum: Properties of Light
Topic: Quantum Test
Replies: 11
Views: 276

Re: Quantum Test

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.
by Hannah Padilla 1H
Wed Oct 24, 2018 6:45 pm
Forum: Properties of Electrons
Topic: Degeneracy
Replies: 11
Views: 320

Re: Degeneracy

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.
by Hannah Padilla 1H
Tue Oct 16, 2018 5:58 pm
Forum: DeBroglie Equation
Topic: Mass of electrons
Replies: 3
Views: 43

Mass of electrons

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?
by Hannah Padilla 1H
Tue Oct 16, 2018 5:47 pm
Forum: DeBroglie Equation
Topic: Angstrom?
Replies: 8
Views: 141

Re: Angstrom?

An Angstrom is the diameter of 1 Hydrogen atom, or 10^-10. We use this, because SI units go by 3s.
by Hannah Padilla 1H
Tue Oct 16, 2018 5:46 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 5
Views: 76

Re: DeBroglie Equation

Also, in the types of problems that do not specifically as for the DeBroglie Equation, how do you know to use it?
by Hannah Padilla 1H
Tue Oct 16, 2018 5:43 pm
Forum: Properties of Electrons
Topic: Electron Question
Replies: 6
Views: 153

Re: Electron Question

Since electron energies are quantized (they can only be certain numbers, and not continuous), then their energy levels reflect that
by Hannah Padilla 1H
Tue Oct 09, 2018 7:57 pm
Forum: SI Units, Unit Conversions
Topic: Quiz 1- Addition to what we should know?
Replies: 5
Views: 194

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

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”
by Hannah Padilla 1H
Tue Oct 09, 2018 7:52 pm
Forum: Balancing Chemical Reactions
Topic: Test 1
Replies: 6
Views: 165

Test 1

For the test, do we need to show each step of the problem? Are points given from showing work?
by Hannah Padilla 1H
Tue Oct 09, 2018 7:49 pm
Forum: Molarity, Solutions, Dilutions
Topic: Homework problem G5
Replies: 2
Views: 116

Homework problem G5

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...
by Hannah Padilla 1H
Fri Oct 05, 2018 7:06 am
Forum: Limiting Reactant Calculations
Topic: multiple limiting reactants
Replies: 9
Views: 122

Re: multiple limiting reactants

It is highly unlikely there will be two limiting reactants
by Hannah Padilla 1H
Fri Oct 05, 2018 7:04 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 96
Views: 29505

Re: Advice from a Medical Student [ENDORSED]

Thank you this was so helpful!!
by Hannah Padilla 1H
Mon Oct 01, 2018 4:19 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactants Post- Module
Replies: 2
Views: 49

Limiting Reactants Post- Module

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...

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