Search found 41 matches

by AntonioZarich2E
Sat Dec 12, 2020 11:03 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Temperature in PH Solving Problems
Replies: 5
Views: 49

Temperature in PH Solving Problems

Does the temperature ever change our answer in questions where we have to find the pH, or is it just kinda there?
by AntonioZarich2E
Sun Dec 06, 2020 6:18 pm
Forum: *Stereochemistry
Topic: stereochemistry reference
Replies: 6
Views: 202

Re: stereochemistry reference

Blake Ballew 1E wrote:Are we expected to know stereochemistry for the final?

I haven't seen stereochemistry on any of the review documents, so I don't think that we will need to know it.
by AntonioZarich2E
Sun Dec 06, 2020 6:15 pm
Forum: Naming
Topic: Naming in alphabetical order?
Replies: 10
Views: 69

Re: Naming in alphabetical order?

The ligands go in alphabetical order, but the prefixes do not determine the order, they just go in front of the ligands.
by AntonioZarich2E
Sun Dec 06, 2020 6:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand definition
Replies: 7
Views: 51

Re: Ligand definition

Ligands always donate their electron pairs and are Lewis bases. They usually bind to the central atom and are transition metals.
by AntonioZarich2E
Sun Dec 06, 2020 6:09 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Does pH indicate strength of an acid?
Replies: 26
Views: 169

Re: Does pH indicate strength of an acid?

Yes, the lower the pH the greater the strength of the acid. The higher the base, the greater the strength of the base.
by AntonioZarich2E
Sun Dec 06, 2020 6:07 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Memorization for final
Replies: 9
Views: 79

Re: Memorization for final

Definitely need to memorize the periodic trends, bond angles, and VESPR. I believe we still have the formula sheet for most of the other stuff.
by AntonioZarich2E
Sat Nov 28, 2020 10:00 pm
Forum: Hybridization
Topic: Confused on Hybridization
Replies: 6
Views: 49

Re: Confused on Hybridization

Count the atoms connected to the atom that you are finding the hybridization of and add that to the number of lone pairs. After finding that number, use the rules, 2=sp, 3=sp2, etc.
by AntonioZarich2E
Sat Nov 28, 2020 9:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: pi and sigma bonds
Replies: 17
Views: 123

Re: pi and sigma bonds

To find the number of sigma bonds, find the total number of bond interactions. To find the number of pi bonds, count the number of double and triple bonds, 1 for double bonds and two for triple.
by AntonioZarich2E
Sat Nov 28, 2020 9:51 pm
Forum: Resonance Structures
Topic: Sapling Week 8 Q17
Replies: 6
Views: 61

Re: Sapling Week 8 Q17

It seems like multiple carbons can form a ring structure, as we have seen multiple examples of that in the lectures, but other than that, I can't say.
by AntonioZarich2E
Sat Nov 28, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Week 7/8 HW #5
Replies: 5
Views: 56

Re: Sapling Week 7/8 HW #5

Axial atoms are generally 180 degrees apart, and are on the same plane as the central atom. Equatorial atoms will be the other atoms.
by AntonioZarich2E
Sat Nov 28, 2020 9:44 pm
Forum: Lewis Structures
Topic: Expanded Valence Shells
Replies: 7
Views: 72

Expanded Valence Shells

I'm having a hard time remembering which atoms can have the expanded valence shell when drawing lewis structures. Is there an easy tip that I can use?
by AntonioZarich2E
Sun Nov 22, 2020 10:20 pm
Forum: Ionic & Covalent Bonds
Topic: variable valence
Replies: 5
Views: 26

Re: variable valence

We haven't covered it so far, and I don't see it on the syllabus, so I assume that we will not need to know it in this class.
by AntonioZarich2E
Sun Nov 22, 2020 10:14 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: Polarizablity
Replies: 10
Views: 88

Re: Polarizablity

Polarizability is basically how difficult it is to distort an electron by pulling apart its shape. London Dispersion forces can change the shapes of molecules by stretching the electron structure of the atoms.
by AntonioZarich2E
Sun Nov 22, 2020 10:12 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy
Replies: 19
Views: 171

Re: Ionization Energy

I believe the electron will be taken from the outermost orbital as that would require less energy than the others.
by AntonioZarich2E
Sun Nov 22, 2020 10:09 pm
Forum: Trends in The Periodic Table
Topic: Periodic Trends Summarized
Replies: 6
Views: 77

Re: Periodic Trends Summarized

Is there a basic rule for whether being in a period or being in a group will change the ionization energy/atomic radius/electronegativity? In short, does going down or across make a bigger difference?
by AntonioZarich2E
Sun Nov 22, 2020 10:05 pm
Forum: Dipole Moments
Topic: Dipole-Dipole
Replies: 10
Views: 47

Re: Dipole-Dipole

Dipole-Dipole bonds are formed when each is a polar molecule, independent of the other one.
by AntonioZarich2E
Sun Nov 15, 2020 11:31 pm
Forum: Ionic & Covalent Bonds
Topic: Saplong 15
Replies: 6
Views: 56

Re: Saplong 15

It has to be HF because F is the only element out of the options that can bond with hydrogen.
by AntonioZarich2E
Sun Nov 15, 2020 11:24 pm
Forum: Ionic & Covalent Bonds
Topic: Formation of Hydrogen bonds
Replies: 2
Views: 11

Re: Formation of Hydrogen bonds

I don't think that F2 would be able to form a hydrogen bond because it isn't polar, although in the second instance it seems like it would.
by AntonioZarich2E
Sun Nov 15, 2020 11:10 pm
Forum: Ionic & Covalent Bonds
Topic: Periodic Table and Equation Sheet
Replies: 11
Views: 81

Re: Periodic Table and Equation Sheet

We aren't allowed to annotate our periodic table before the test, but I usually write a annotate one before, and then after the test starts write everything on the page so I don't forget.
by AntonioZarich2E
Sun Nov 15, 2020 11:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2
Replies: 23
Views: 139

Re: Midterm 2

The syllabus says that it is the same number of time as the first midterm.
by AntonioZarich2E
Sun Nov 15, 2020 10:59 pm
Forum: Bond Lengths & Energies
Topic: Sapling Question 11
Replies: 5
Views: 29

Re: Sapling Question 11

Bond length is determined by size and electronegativity. Hydrogen is smaller than O, so the N-H bond will be shorter than the N-O bond.
by AntonioZarich2E
Sun Nov 08, 2020 2:37 pm
Forum: Octet Exceptions
Topic: Lewis Acid and Lewis Base
Replies: 7
Views: 62

Re: Lewis Acid and Lewis Base

Lewis acids are cations and Lewis bases are anions.
by AntonioZarich2E
Sun Nov 08, 2020 2:31 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Textbook question 2A.9 (omit c and d)
Replies: 2
Views: 14

Re: Textbook question 2A.9 (omit c and d)

I think you would start by adding the two electrons from the electron configurations given and using the periodic table.
by AntonioZarich2E
Sun Nov 08, 2020 2:27 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Tech & Electron Configuration
Replies: 2
Views: 31

Re: Tech & Electron Configuration

It seems like there is no way to know for sure, but the models are a good way for us to work around this.
by AntonioZarich2E
Sun Nov 08, 2020 2:25 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 126
Views: 735

Re: How to relax

I usually just go for a walk with my dog and listen to music.
by AntonioZarich2E
Sun Nov 08, 2020 2:19 pm
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 588

Re: Studying From Home

When I have to really cram for something, I make sure that I am cold and sitting in an uncomfortable spot. It makes me want to study efficiently and makes sure I don't get drowsy.
by AntonioZarich2E
Sun Nov 01, 2020 5:53 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Radius
Replies: 8
Views: 49

Re: Radius

With isoelectric ions, the ion with the smallest nuclear charge will have the biggest radius.
by AntonioZarich2E
Sun Nov 01, 2020 5:49 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1220

Re: Favorite TV shows

If you're looking for dramas, I've really gotten into All American, Breaking Bad, and Money Heist.
by AntonioZarich2E
Sun Nov 01, 2020 5:45 pm
Forum: Trends in The Periodic Table
Topic: ionic radius
Replies: 14
Views: 71

Re: ionic radius

Is there an easy way to find out if an anion of an element would be bigger than a cation of a different element, if the natural atom of the element corresponding to the anion is smaller than that of the cation?
by AntonioZarich2E
Sun Nov 01, 2020 5:38 pm
Forum: Bond Lengths & Energies
Topic: ionization energy
Replies: 6
Views: 86

Re: ionization energy

Oxygen needs 4 electrons to fill up its shell, while the other two just need 3.
by AntonioZarich2E
Sat Oct 31, 2020 7:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation Points [ENDORSED]
Replies: 62
Views: 1046

Re: Participation Points [ENDORSED]

Is it strictly 5 posts per week in terms of the participation points or is it a total of 50 at the end of the quarter?
by AntonioZarich2E
Sat Oct 17, 2020 10:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 107
Views: 7324

Re: Accessing the E-textbook [ENDORSED]

alebenavides wrote:Does anyone know when we get our access code? I bought the book a few days ago but haven't received it so I had to get the free 10 day trial.

I got my access code for sapling in the mail a week or so after buying the book, but haven't gotten a code for the online book yet.
by AntonioZarich2E
Sat Oct 17, 2020 10:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 107
Views: 7324

Re: Accessing the E-textbook [ENDORSED]

Kennedi2J wrote:Does anyone know if Sapling is mandatory?

Sapling is listed on the syllabus as worth 5 points per week, so if by mandatory you mean graded, I think it is.
by AntonioZarich2E
Sat Oct 17, 2020 10:09 pm
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 307

Re: Study Advice

The step-up sessions are pretty helpful and I've found the material a little bit easier to understand, but if you don't have trouble with the topics in the bookwork problems, you will probably be fine.
by AntonioZarich2E
Sat Oct 17, 2020 10:02 pm
Forum: Einstein Equation
Topic: Converting from MHz to Hz
Replies: 5
Views: 45

Re: Converting from MHz to Hz

I make this mistake a lot, in this type of problem, you have to start by changing the MHz to Hz, otherwise your conversions will be off later.
by AntonioZarich2E
Sat Oct 17, 2020 9:57 pm
Forum: DeBroglie Equation
Topic: Units in Debroglie Equation
Replies: 3
Views: 16

Re: Units in Debroglie Equation

In Debroglie's equation, the mass is in kilograms (kg) and the velocity is in meters per second (m/s).
by AntonioZarich2E
Sat Oct 10, 2020 9:30 pm
Forum: Balancing Chemical Reactions
Topic: Balancing equations.
Replies: 35
Views: 775

Re: Balancing equations.

I've found the most success when I start with the one that appears in the formula the least and then work my way up. If the equation is especially difficult, I'll make a table with the amount of products and reactants on either side and keep track of it that way.
by AntonioZarich2E
Sat Oct 10, 2020 9:26 pm
Forum: Balancing Chemical Reactions
Topic: Molar Mass
Replies: 23
Views: 204

Re: Molar Mass

I generally leave the numbers as they are on the periodic table in my calculator, and then round to the hundredths in the answer. This worked for the Sapling homework.
by AntonioZarich2E
Sat Oct 10, 2020 9:21 pm
Forum: Significant Figures
Topic: Number of Sig Figs according to a question.
Replies: 5
Views: 23

Re: Number of Sig Figs according to a question.

One thing I'm still not really sure of is how many zeros after a sig fig on the right side of the decimal point are sig figs. For example, if I was to determine asked for 0.320 and 0.3200, would they both have three sig figs?
by AntonioZarich2E
Sat Oct 10, 2020 9:18 pm
Forum: Properties of Light
Topic: Electric and Magnetic Field Waves
Replies: 2
Views: 21

Re: Electric and Magnetic Field Waves

I was also, a little confused on the difference between the electric and magnetic fields. The main difference that I found online is that a magnetic field is caused by moving electrical charges, while the electrical fields are caused by stationary charges.
by AntonioZarich2E
Sat Oct 10, 2020 8:53 pm
Forum: SI Units, Unit Conversions
Topic: Unit Rounding
Replies: 11
Views: 79

Unit Rounding

In general, are we supposed to round or truncate, and to how many places if it is not specified in the question?

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