Search found 31 matches
- Tue Dec 04, 2018 8:27 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acid dissociation
- Replies: 5
- Views: 532
Re: Acid dissociation
It's impossible for it to be 100% dissolved, so we must assume its 100%.
- Tue Dec 04, 2018 8:26 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why is HCOOH a stronger acid than CH3COOH? [ENDORSED]
- Replies: 2
- Views: 559
Re: Why is HCOOH a stronger acid than CH3COOH? [ENDORSED]
We know that an acid is considered stronger if it can lose a hydrogen easily to a base. Because the CH3 contributes electron density towards the O-H bond, it makes it harder to remove the H and makes acetic acid a weaker acid than formic acid. Basically, formic acid is stronger because CH3 in acetic...
- Tue Dec 04, 2018 8:24 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: “Soapy” feel of bases
- Replies: 5
- Views: 2555
Re: “Soapy” feel of bases
Because they dissolve fatty acids and the oils on your skin, bases give a "soapy-like" feel.
- Tue Dec 04, 2018 8:20 pm
- Forum: Bronsted Acids & Bases
- Topic: Acetic acid vs Formic acid
- Replies: 1
- Views: 364
Re: Acetic acid vs Formic acid
We know that an acid is considered stronger if it can lose a hydrogen easily to a base. Because the CH3 contributes electron density towards the O-H bond, it makes it harder to remove the H and makes acetic acid a weaker acid than formic acid. Basically, formic acid is stronger because CH3 in acetic...
- Tue Dec 04, 2018 8:16 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Fundamentals J7
- Replies: 5
- Views: 721
Re: Fundamentals J7
Thank you this was so helpful! I was stuck on this as well. Do you guys think there will be a question like this on the final?
- Thu Nov 29, 2018 8:44 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 9 Test
- Replies: 6
- Views: 681
Re: Week 9 Test
You can check online, Professor Lavelle lists what you need to know for the test!
"Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."
"Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."
- Thu Nov 29, 2018 8:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final
- Replies: 11
- Views: 1368
Re: Final
Does anyone know when the review sessions would be up for the final?
- Thu Nov 29, 2018 8:39 pm
- Forum: DeBroglie Equation
- Topic: work function and frequency
- Replies: 4
- Views: 921
Re: work function and frequency
Both answers above are correct, just remember that kinetic energy = initial energy - work function
- Sun Nov 25, 2018 5:34 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 36125
Re: All students read this sig fig post [ENDORSED]
You will still get a few points taken off if the significant figures are not correct.
- Sun Nov 25, 2018 5:33 pm
- Forum: Trends in The Periodic Table
- Topic: Ionization energy
- Replies: 4
- Views: 835
Re: Ionization energy
This is because ionization energy decreases as you move across a period.
- Sun Nov 25, 2018 5:32 pm
- Forum: Hybridization
- Topic: Test 3
- Replies: 13
- Views: 928
Re: Test 3
Directly from Dr. Lavelle,
"Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."
Hope this helps.
"Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."
Hope this helps.
- Sun Nov 18, 2018 4:49 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862392
Re: Post All Chemistry Jokes Here
I tried writing jokes about the periodic table…
…but I realized I wasn’t quite in my element.
…but I realized I wasn’t quite in my element.
- Sun Nov 18, 2018 4:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862392
Re: Post All Chemistry Jokes Here
What should you do if no one laughs at your chemistry jokes?
Keep telling them until you get a reaction.
Keep telling them until you get a reaction.
- Sun Nov 18, 2018 4:46 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity vs. Electron Affinity?
- Replies: 11
- Views: 1723
Re: Electronegativity vs. Electron Affinity?
I'm confident the answer above mine is correct.
- Sun Nov 18, 2018 4:28 pm
- Forum: Student Social/Study Group
- Topic: curve?
- Replies: 20
- Views: 3048
Re: curve?
That's true! Just work hard to at least get 250 points so you can pass the class.
- Sun Nov 18, 2018 2:07 pm
- Forum: Sigma & Pi Bonds
- Topic: usage of sigma/pi
- Replies: 6
- Views: 707
Re: usage of sigma/pi
Thank you! I was also confused by this.
- Sun Nov 18, 2018 1:59 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
- Replies: 135
- Views: 39491
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
Thank you so much! When will you be posting the key for this worksheet?
- Mon Oct 29, 2018 10:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 173912
Re: How to find my posts
I just want to be clear, so there is no way to get notifications if Professor Lavelle has posted anything?
- Mon Oct 29, 2018 10:00 pm
- Forum: Student Social/Study Group
- Topic: Studying for tests/midterm
- Replies: 18
- Views: 2818
Re: Studying for tests/midterm
If this is helpful to anyone, I found a cheat sheet with all formulas we would need!
https://drive.google.com/file/d/1ahWSl0 ... sp=sharing
https://drive.google.com/file/d/1ahWSl0 ... sp=sharing
- Mon Oct 29, 2018 9:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 21510
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Is this the only review session you will be having?
Lyndon: I have my regular UA sessions 6-8pm Tuesday night in Covel 210 where I review material from each week. This Saturday is my only midterm review session, but it is 3 hours and should be plenty!
Lyndon: I have my regular UA sessions 6-8pm Tuesday night in Covel 210 where I review material from each week. This Saturday is my only midterm review session, but it is 3 hours and should be plenty!
- Sat Oct 27, 2018 10:09 pm
- Forum: SI Units, Unit Conversions
- Topic: Test and Exam Dates
- Replies: 10
- Views: 1202
Re: Test and Exam Dates
Yes, we have that Thursday and Friday off.
- Sat Oct 27, 2018 10:08 pm
- Forum: Significant Figures
- Topic: knowing how many sig figs to use
- Replies: 17
- Views: 2229
Re: knowing how many sig figs to use
Also, remember to ignore any zeros in the beginning!
- Fri Oct 26, 2018 8:37 am
- Forum: Photoelectric Effect
- Topic: How to calculate the kinetic energy, energy and frequency? [ENDORSED]
- Replies: 25
- Views: 7593
Re: How to calculate the kinetic energy, energy and frequency? [ENDORSED]
Thank you so much! This was extremely helpful.
- Thu Oct 18, 2018 10:42 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862392
Re: Post All Chemistry Jokes Here
Have you heard the one about a chemist who was reading a book about helium?
He just couldn't put it down.
He just couldn't put it down.
- Thu Oct 18, 2018 10:39 pm
- Forum: Properties of Electrons
- Topic: eV to J
- Replies: 7
- Views: 969
Re: eV to J
An eV is a unit of energy equal to approximately 1.602×10−19 joules (symbol J). One eV is equal to the amount of energy one electron acquires by accelerating through a potential difference of one volt.
- Thu Oct 18, 2018 10:34 pm
- Forum: Properties of Light
- Topic: Test 2 [ENDORSED]
- Replies: 15
- Views: 1276
Re: Test 2 [ENDORSED]
Yes you should refer to the second outline.
- Fri Oct 12, 2018 1:29 pm
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1952
Re: Calculators
Amazon has some for really cheap if this helps, I'm sure you can do the calculations yourself but they will be time-consuming.
- Fri Oct 12, 2018 9:27 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity and Dilution
- Replies: 11
- Views: 4497
Re: Molarity and Dilution
No, because it mentions how the final volume BECOMES 125 mL meaning it replaces the 75 mL. I think that part was meant to test us.
- Sun Oct 07, 2018 2:11 pm
- Forum: SI Units, Unit Conversions
- Topic: Modules?
- Replies: 8
- Views: 738
Re: Modules?
Yeah, our professor just said that we can use them for review. Although they are highly recommended it's not required because Professor Lavelle can't see who has done them or the scores they got.
- Sun Oct 07, 2018 2:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to list Chem_Mod posts
- Replies: 25
- Views: 94042
Re: How to list Chem_Mod posts
Thanks so much!
- Tue Oct 02, 2018 10:06 am
- Forum: SI Units, Unit Conversions
- Topic: Week 1 Homework Assignment [ENDORSED]
- Replies: 16
- Views: 1306
Re: Week 1 Homework Assignment [ENDORSED]
Yes. I believe that's correct. I think he just wants to see the class communicating with each other.