CHEMISTRY COMMUNITY

RBergtraun_3A

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...

RBergtraun_3A

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...

RBergtraun_3A

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?

RBergtraun_3A

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(...

RBergtraun_3A

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

RBergtraun_3A

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...

RBergtraun_3A

Also remember that 0 celcius is freezing point for water and 0 Kelvin doesnt really exist since it means when electrons stop moving.

RBergtraun_3A

You dont need to know Fahrenheit, but Kelvin is always 273 degrees more that Celcius.

RBergtraun_3A

Why is the charge on Sulfate 2-?

RBergtraun_3A

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?

RBergtraun_3A

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

RBergtraun_3A

Nawal Dandachi 3G wrote:yeah i believe so

For sure thanks

RBergtraun_3A

Should we know the charge of certain compounds for the test or will that be given?

RBergtraun_3A

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...

RBergtraun_3A

Do we need to know if an acid is weak or strong by heart for the test?

RBergtraun_3A

do only ions have a pH?

RBergtraun_3A

I got linear here. I checked and its in the solutions book.

RBergtraun_3A

linear since theres lone pairs on opposing sides.

RBergtraun_3A

You always add O2 when its a combustion reaction. Fire needs oxygen.

RBergtraun_3A

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

RBergtraun_3A

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...

RBergtraun_3A

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...

RBergtraun_3A

Do you guys read the whole book? what are some tips for studying?

RBergtraun_3A

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.

RBergtraun_3A

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...

RBergtraun_3A

Do we need to know the electronegativity by heart for the test?

RBergtraun_3A

its useful to use fractions in the process of figuring it out then multiplying the whole equation (both sides) by a least common denominator.

RBergtraun_3A

Are there trends for electron affinity on the periodic table?

RBergtraun_3A

you can easily convert between. 10^3.

RBergtraun_3A

Evamae Bayudan 1B wrote:Will we be penalized for putting extra significant figures?

Without a doubt. I would not add any extra.

RBergtraun_3A

Some of them will be given on the sheet, but I would memorize the most common ones!

RBergtraun_3A

valence electrons are found in the outer most orbital. The number is equal to the atom's main group number. Hopefully that simplifies things.

RBergtraun_3A

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.

RBergtraun_3A

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.

RBergtraun_3A

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-...

RBergtraun_3A

I had a similar question, this video helped me a lot. Hope it helps you. https://www.khanacademy.org/science/phy ... c-spectrum

RBergtraun_3A

Hey guys, I'm not quite grasping the point of the differentiation between the s-block p-block and d-block. Thanks!

RBergtraun_3A

Khan academy works really well for quick brush up on knowledge. I'm in the same boat.

RBergtraun_3A

Is it just me or is hard to figure out what readings we're supposed to be doing?

RBergtraun_3A

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

RBergtraun_3A

Very inspiring! Thank you for taking the time.

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