Search found 17 matches

by ludrin8348
Mon Jul 31, 2017 7:17 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Question about the upcoming test
Replies: 1
Views: 307

Question about the upcoming test

In the syllabus it asks for problems in Fundamentals J. Does that mean that we also have to know what it is on this section? I know it is very basic information, but the more we know about the topics covered in the test, the better prepared we'll be.
by ludrin8348
Mon Jul 31, 2017 7:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: HOMEWORK 11.11
Replies: 1
Views: 271

HOMEWORK 11.11

Can somebody fully walk me through this problem?
I don't even know where to start. Please, it would help a lot...
by ludrin8348
Mon Jul 31, 2017 7:07 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1012722

Re: Post All Chemistry Jokes Here

I can't stop laughing...

Image
by ludrin8348
Mon Jul 31, 2017 7:02 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1012722

Re: Post All Chemistry Jokes Here

Aww :)

Image
by ludrin8348
Sun Jul 23, 2017 11:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angular VS Bent
Replies: 3
Views: 391

Angular VS Bent

What is the difference between angular and bent? I was looking into a water molecule in a problem, and in the solution manual is shown as angular, but in class Professor Lavelle said it was bent. Are they the same thing?
by ludrin8348
Sun Jul 23, 2017 11:45 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarization Power vs. Polarizability
Replies: 1
Views: 330

Polarization Power vs. Polarizability

I am still confused with the difference between polarization power and polarizability. I know they are two different things, but I am not so sure about the difference between them. I need this small details to do problems 3.81 & 3.83. However, I think polarization power is the power to pull elec...
by ludrin8348
Sun Jul 23, 2017 11:37 pm
Forum: Hybridization
Topic: Homework 4.41
Replies: 1
Views: 224

Homework 4.41

This problem ask for the Lewis structure and hybrid orbital on each atom. The molecule is CH2CHCN. I have no problem doing the Lewis structure, but I am stuck in the hybrid orbital. Can somebody tell me how to find the hybrid orbitals and why are those the assigned orbitals on each situation??
by ludrin8348
Sun Jul 23, 2017 11:32 pm
Forum: Hybridization
Topic: Hybridization in ions
Replies: 1
Views: 666

Hybridization in ions

So I was doing Homework problem #4.33 and I came up with the question of how do we find the hybrization of ions? I wanted to know if we need to use the same procedure as if it was an atom. In this case, the problem is c)(BH4)-, which I believe if it is solve like a regular atom, it would have a hybr...
by ludrin8348
Sun Jul 16, 2017 11:12 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds (video)
Replies: 6
Views: 407

Covalent Bonds (video)

While I was looking for some videos on Youtube about Covalent bonds, I came across this video. I thought it was very helpful, but also really funny. It has a very unexpected ending that will help you understand Covalent Bonds better, but it will also bring a smile to your face.

by ludrin8348
Sun Jul 16, 2017 11:05 pm
Forum: Trends in The Periodic Table
Topic: Trends in the Periodic Table (video)
Replies: 1
Views: 207

Trends in the Periodic Table (video)

For those who are still stuck in this topics and want to have a better understanding of the trends in the periodic table, I found this cool video on Youtube, that I would like to share with all of you. It explains everything about atomic radius, ionization energy, and electronegativity. It helped me...
by ludrin8348
Sun Jul 16, 2017 11:00 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Homework 3.9 & 3.11
Replies: 1
Views: 202

Homework 3.9 & 3.11

Both of these problems are asking the same thing, to find the +2 ions that are predicted to have the given ground-state e- configuration. I wanted to know which would be the right way to approach this problem. I have some theories, but I wanted to know which is closest to the one that is going to gi...
by ludrin8348
Sun Jul 16, 2017 10:51 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Homework 3.5
Replies: 1
Views: 192

Homework 3.5

For this problem, I need to find the electron configuration of several ions with different charges (+/-) and I was wondering if we need to take/add electrons from the shell that has the highest energy, or from the shells that will make our atom more stable. For example: a) Cu+ The normal e- configur...
by ludrin8348
Tue Jul 04, 2017 1:15 pm
Forum: Molarity, Solutions, Dilutions
Topic: E.1 Homework Problem
Replies: 2
Views: 273

Re: E.1 Homework Problem

Thank you :)
That helps a lot.
by ludrin8348
Sun Jul 02, 2017 11:46 pm
Forum: Balancing Chemical Reactions
Topic: Order of steps
Replies: 6
Views: 520

Re: Order of steps

Another helpful tip is to count the number of atoms that you have in each side, so that you can have a better understanding of which atoms you need to alter.
by ludrin8348
Sun Jul 02, 2017 11:33 pm
Forum: SI Units, Unit Conversions
Topic: Converting units in a faster way (shortcut) [ENDORSED]
Replies: 1
Views: 336

Converting units in a faster way (shortcut) [ENDORSED]

This is a small trick to convert units faster. Let's say, we have 250 picometers (pm) and we want to convert them to meters (m). -We know that pico- means 10^-12, therefore we can substitute the word pico-, in 250 picometers for 10^-12, and we would be multiplying it. -Then, instead of having 250 pi...
by ludrin8348
Sun Jul 02, 2017 11:19 pm
Forum: Significant Figures
Topic: Calculating Significant Figures
Replies: 3
Views: 579

Calculating Significant Figures

Here are some tips to calculate significant figures: *Any non-zero number is considerate significant (1,2,3,4,5,6,7,...) *When a zero is found between two non-zero numbers, the zero is significant. (101, 3 sig figs) *Zeros to the left or at the beginning of a number are not significant. (0.005, 1 si...
by ludrin8348
Sun Jul 02, 2017 11:05 pm
Forum: Molarity, Solutions, Dilutions
Topic: E.1 Homework Problem
Replies: 2
Views: 273

E.1 Homework Problem

For this problems I understand that it is asking, What would be the length of 1.00 moles of Ag? and that the first thing I have to do is convert the 1.00 mol of Ag, into atoms by using avogadro's number. But how should I use the information of the 144 pm to answer the question? What would be the nex...

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