Search found 41 matches
- Sat Dec 07, 2019 3:56 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: polydentate
- Replies: 3
- Views: 246
Re: polydentate
it all depends on the structure of each molecule. like some have multiple potential bonding sites, but the sites aren’t far enough apart that 2 could bind, and some have 2 bonding sites that are far enough apart that it could bind to 2 molecules at the same time. A molecule that can bind both at th...
- Sat Dec 07, 2019 3:55 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: polydentate
- Replies: 3
- Views: 246
Re: polydentate
it all depends on the structure of each molecule. like some have multiple potential bonding sites, but the sites aren’t far enough apart that 2 could bind, and some have 2 bonding sites that are far enough apart that it could bind to 2 molecules at the same time. I kind of figured it out, you're de...
- Sat Dec 07, 2019 2:51 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: polydentate
- Replies: 3
- Views: 246
polydentate
how do u differentiate between a ligand that has two binding site but can only bind one at a time and one that can bond two at the same time?
- Sat Dec 07, 2019 2:49 pm
- Forum: Empirical & Molecular Formulas
- Topic: charge
- Replies: 4
- Views: 447
Re: charge
The charge is 2- because you calculate the formal charge on each atom. For the single bonded oxygens, the formal charge is -1 because you take the valence electrons and subtract the lone pairs and half the bonding pairs, 6-(6 + .5(2)). The double bonded oxygens have a formal charge of 0, 6-(4 + .5(...
- Sat Dec 07, 2019 12:56 pm
- Forum: Empirical & Molecular Formulas
- Topic: charge
- Replies: 4
- Views: 447
Re: charge
Bryce Barbee wrote:It is because there are 2 double bonds on the Sulfur and the two single bonded oxygens have a negative 1 charge.
This took me a sec but makes sense thanks
- Fri Dec 06, 2019 6:56 pm
- Forum: Bronsted Acids & Bases
- Topic: strong v weak acids
- Replies: 8
- Views: 439
Re: strong v weak acids
I think you really just need to know the 6 strong bases and know those are the ones that completely dissociate. The rest wouldn't completely dissociate, and it is likely that you would be given values for calculations to determine how strong or weak an acid is. Hopefully that made sense! Would thos...
- Fri Dec 06, 2019 6:52 pm
- Forum: SI Units, Unit Conversions
- Topic: Remembering temperature conversions
- Replies: 2
- Views: 356
Re: Remembering temperature conversions
Also remember that 0 celcius is freezing point for water and 0 Kelvin doesnt really exist since it means when electrons stop moving.
- Fri Dec 06, 2019 6:51 pm
- Forum: SI Units, Unit Conversions
- Topic: Remembering temperature conversions
- Replies: 2
- Views: 356
Re: Remembering temperature conversions
You dont need to know Fahrenheit, but Kelvin is always 273 degrees more that Celcius.
- Fri Dec 06, 2019 6:49 pm
- Forum: Empirical & Molecular Formulas
- Topic: charge
- Replies: 4
- Views: 447
charge
Why is the charge on Sulfate 2-?
- Wed Dec 04, 2019 1:23 pm
- Forum: Naming
- Topic: Memorization
- Replies: 6
- Views: 351
Re: Memorization
Jasmine Fendi 1A wrote:I think we need to memorize it and also we should memorize the ligands list that Lavelle sent out in an email.
Do you know what compounds we need to memorize?
- Wed Dec 04, 2019 1:22 pm
- Forum: Naming
- Topic: Memorization
- Replies: 6
- Views: 351
Re: Memorization
Jasmine Fendi 1A wrote:I think we need to memorize it and also we should memorize the ligands list that Lavelle sent out in an email.
Thank you, very helpful
- Wed Dec 04, 2019 1:21 pm
- Forum: Naming
- Topic: Memorization
- Replies: 6
- Views: 351
Re: Memorization
Nawal Dandachi 3G wrote:yeah i believe so
For sure thanks
- Tue Dec 03, 2019 10:59 pm
- Forum: Naming
- Topic: Memorization
- Replies: 6
- Views: 351
Memorization
Should we know the charge of certain compounds for the test or will that be given?
- Mon Dec 02, 2019 10:57 pm
- Forum: Bronsted Acids & Bases
- Topic: strong v weak acids
- Replies: 8
- Views: 439
Re: strong v weak acids
I think you really just need to know the 6 strong bases and know those are the ones that completely dissociate. The rest wouldn't completely dissociate, and it is likely that you would be given values for calculations to determine how strong or weak an acid is. Hopefully that made sense! Would thos...
- Mon Dec 02, 2019 10:51 pm
- Forum: Bronsted Acids & Bases
- Topic: strong v weak acids
- Replies: 8
- Views: 439
strong v weak acids
Do we need to know if an acid is weak or strong by heart for the test?
- Mon Dec 02, 2019 10:21 pm
- Forum: Bronsted Acids & Bases
- Topic: general q
- Replies: 2
- Views: 229
general q
do only ions have a pH?
- Sun Dec 01, 2019 12:39 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2.57
- Replies: 4
- Views: 293
Re: 2.57
I got linear here. I checked and its in the solutions book.
- Sun Dec 01, 2019 12:36 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular shape of carbon Dioxide
- Replies: 10
- Views: 578
Re: Molecular shape of carbon Dioxide
linear since theres lone pairs on opposing sides.
- Sun Dec 01, 2019 12:35 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing This Equation
- Replies: 11
- Views: 1045
Re: Balancing This Equation
You always add O2 when its a combustion reaction. Fire needs oxygen.
- Sun Dec 01, 2019 12:34 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinity
- Replies: 7
- Views: 644
Re: electron affinity
Chanel D_4E wrote:Electron affinity increases as you goes up a period and across a period (from left to right).
Thats such a helpful image thank u so much
- Sun Dec 01, 2019 12:32 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table trends
- Replies: 11
- Views: 845
Re: Periodic Table trends
s-, p-, d-, and f-orbitals all basically coordinate based on the number of nodal planes, the number of electrons that they can hold, and their shape. If you search up a periodic table with the blocks in place, you can see how the electrons fill out the orbitals based on its levels, and so forth. Fo...
- Sun Dec 01, 2019 12:31 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table trends
- Replies: 11
- Views: 845
Re: Periodic Table trends
The biggest difference is their shape and their ability to hold e-. The s-orbital can only hold 2 e-. The p-orbital can only only 6 e-. The d-orbital can only hold 10 e-. The f-block can hold 14 e-. In the ground state of an atom, the electrons must fill up all spots in lower energy levels before m...
- Sun Dec 01, 2019 12:30 pm
- Forum: Student Social/Study Group
- Topic: readings
- Replies: 13
- Views: 864
Re: readings
Do you guys read the whole book? what are some tips for studying?
- Sun Dec 01, 2019 12:27 pm
- Forum: Significant Figures
- Topic: Sig Figs on Tests
- Replies: 24
- Views: 2105
Re: Sig Figs on Tests
Generally your answer uses the least amount of precision given. So if one number has three sig figs and the other has 4 the answer would use 3.
- Mon Nov 18, 2019 2:28 pm
- Forum: Electronegativity
- Topic: test
- Replies: 7
- Views: 512
Re: test
I don't believe that they'd expect us to have the electronegativity values memorized, but definitely understanding the trend and how it's affected by the atomic number and the distance at which its valence electrons reside from the charged nucleus. Thanks! If you don't mind what are the trends more...
- Mon Nov 18, 2019 1:36 pm
- Forum: Electronegativity
- Topic: test
- Replies: 7
- Views: 512
test
Do we need to know the electronegativity by heart for the test?
- Sun Nov 17, 2019 10:38 pm
- Forum: Balancing Chemical Reactions
- Topic: Fractions
- Replies: 34
- Views: 1343
Re: Fractions
its useful to use fractions in the process of figuring it out then multiplying the whole equation (both sides) by a least common denominator.
- Sun Nov 17, 2019 10:36 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinity
- Replies: 7
- Views: 644
electron affinity
Are there trends for electron affinity on the periodic table?
- Sun Nov 17, 2019 10:28 pm
- Forum: SI Units, Unit Conversions
- Topic: Kg
- Replies: 4
- Views: 493
Re: Kg
you can easily convert between. 10^3.
- Sun Nov 17, 2019 10:27 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 33492
Re: All students read this sig fig post [ENDORSED]
Evamae Bayudan 1B wrote:Will we be penalized for putting extra significant figures?
Without a doubt. I would not add any extra.
- Sun Nov 17, 2019 10:25 pm
- Forum: SI Units, Unit Conversions
- Topic: Memorizing Conversions
- Replies: 25
- Views: 1282
Re: Memorizing Conversions
Some of them will be given on the sheet, but I would memorize the most common ones!
- Sun Oct 27, 2019 4:25 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons
- Replies: 16
- Views: 679
Re: Valence Electrons
valence electrons are found in the outer most orbital. The number is equal to the atom's main group number. Hopefully that simplifies things.
- Sun Oct 27, 2019 4:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionization
- Replies: 5
- Views: 295
Re: ionization
Essentially, ionization is the energy required to remove an electron from an ion. For the most part, the trend on the periodic table is that ionization energy increases left to right and decreases top to bottom.
- Sun Oct 27, 2019 4:01 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table trends
- Replies: 11
- Views: 845
Re: Periodic Table trends
Mashkinadze_1D wrote:These all correlate to the quantum number of l. This is simply how they are shown on the periodic table. The connection between the two is seen!
Not quite sure I understand l yet but thats a good piece of advice thank you.
- Sun Oct 27, 2019 3:59 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table trends
- Replies: 11
- Views: 845
Re: Periodic Table trends
The s-, p-, d-, and f- orbitals designate the shapes of the mathematical functions predicting the locations of electrons in atoms. The s- orbital has a spherical shape with no nodal planes and symmetric distribution, the p-orbital has two lobes on either side of the nucleus, d- orbital has three 4-...
- Sat Oct 26, 2019 1:55 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Plausibility
- Replies: 31
- Views: 2570
Re: Wavelength Plausibility
I had a similar question, this video helped me a lot. Hope it helps you. https://www.khanacademy.org/science/phy ... c-spectrum
- Tue Oct 22, 2019 12:02 am
- Forum: Trends in The Periodic Table
- Topic: Periodic Table trends
- Replies: 11
- Views: 845
Periodic Table trends
Hey guys, I'm not quite grasping the point of the differentiation between the s-block p-block and d-block. Thanks!
- Sat Oct 19, 2019 4:16 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 415867
Re: Rusty on High School Chem [ENDORSED]
Khan academy works really well for quick brush up on knowledge. I'm in the same boat.
- Thu Oct 10, 2019 2:49 pm
- Forum: Student Social/Study Group
- Topic: readings
- Replies: 13
- Views: 864
readings
Is it just me or is hard to figure out what readings we're supposed to be doing?
- Sat Oct 05, 2019 4:39 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Mole help [ENDORSED]
- Replies: 8
- Views: 423
Mole help [ENDORSED]
Hi guys! Can anyone explain moles to me in a simple way? I get what they are technically, but it's still not completely clear in my mind. Thanks
- Thu Oct 03, 2019 10:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 244594
Re: Advice from a Medical Student - Part II [ENDORSED]
Very inspiring! Thank you for taking the time.