CHEMISTRY COMMUNITY

Jennifer Zhou 1A

Will the answers be posted? :(

Jennifer Zhou 1A

so to be the most ionic, the electronegativity difference between the two bonded atoms should be the greatest. so we should choose the most electronegative element, which is F in the top right corner, and the least electronegative atom, which is Fr in the bottom left corner, to form the most ionic c...

Jennifer Zhou 1A

I think we can check how many binding sites are there in total to determine the shape. here there is 3 C2O4, each C2O4 has 2, since it is a bidentate, so a total of 6 bindings sites. and this is similar to electron density regions, so the shape is octahedral

Jennifer Zhou 1A

in the review practice question, one of answer was like this i. Fe(OH2) 63 +( aq) + H2O (l) = Fe(OH2) 5( OH)2 +(aq) + H3O + ( aq) ii. Fe(OH2) 5( OH)2 +(aq) + H2O (l) = Fe(OH2) 4( OH)2+ ( aq) + H3O + (aq) iii. Fe(OH2) 4( OH)2 + (aq) + H2O (l) = Fe(OH2) ...

Jennifer Zhou 1A

Thank you so much!

Jennifer Zhou 1A

if the electronegativity difference is greater than 2, it has ionic bond if the electronegativity difference is less than 1.5, it has covalent bond How would we go about calculating electronegativity? there is an electronegativity chart if you google it, but we don't have to memorize all of them. b...

Jennifer Zhou 1A

I think the London forces gets higher when there are more electrons, since there is a bigger electron cloud to be induced

Jennifer Zhou 1A

if the electronegativity difference is greater than 2, it has ionic bond
if the electronegativity difference is less than 1.5, it has covalent bond

Jennifer Zhou 1A

non-metal oxides are acidic, such as SO2, because they react with water to produce corresponding acids.
SO2 react with H2O to produce H2SO4

Jennifer Zhou 1A

bronsted acid usually has an H in it, like HCl, H2SO4, since it can donate H+
bronsted base usually has an OH in it, like NaOH and KOH, so it can accept the H+ from acid to form H2O.

Jennifer Zhou 1A

I think all the polydentate are marked in the book on this table, apart from them, all other mono dentate have one binding site only.

Jennifer Zhou 1A

yes I think so. it's better to remember all the ligands appeared on the book

Jennifer Zhou 1A

No, only material after the midterm is going to be tested

Jennifer Zhou 1A

because they are formed with the 3 most electronegative atoms F N and O. they attract the electron density the most.

Jennifer Zhou 1A

Can someone explain this question to me? why can't (c) be a chelating ligand?

Jennifer Zhou 1A

Even FaceApp can't make this plastic bottle age well. Only recycling can do that.

Jennifer Zhou 1A

ah I got it now. no problem now

Jennifer Zhou 1A

how to name [Co(CN)5(OH2)]2- ????

Jennifer Zhou 1A

2.45 Consider the bonding in H2CPCHCHO. (a) Draw the most important Lewis structure. Include all nonzero formal charges. (b) Identify the composition of the bonds and the hybridization of each lone pair—for example, by writing s(H1s,C2sp2). I know question (a) but for question (b) can someone explai...

Jennifer Zhou 1A

so we name the ligand first, then the transition metal cation (with its oxidation state as Roman numeral), then the anions In the ligand naming, we name it in the alphabetical order. for [Co(NH3)5Cl]Cl, amine starts with a, chlorine starts with c, so we name amine first. so it's pentaaminechlorocoba...

Jennifer Zhou 1A

so NaC6H5O dissociate into cation Na+ and C6H5O-, then the Na+ forms NaOH with the OH- from water and C6H5O- from C6H6O with H+ from water. NaC6H5O + H2O = NaOH + C6H6O

Jennifer Zhou 1A

I don't think so....

Jennifer Zhou 1A

I think it can, but requires high energy/ high temperature to react. I googled it. it needs about 700 degree Celsius to react.
CaO + 2HCN → CaCN2 + CO + H2

Jennifer Zhou 1A

Two chemists walk into a bar
The first chemist says I'll have some H2O. The second says I'll have some H2O too. The second one dies shortly after.

Jennifer Zhou 1A

What can you make when you have 6.022x10^23 avocados?

Guacamole, because you gotta follow Avocado’s Law.

Jennifer Zhou 1A

isomers

Jennifer Zhou 1A

Lewis acids are electron pair acceptor. Lewis bases are electron pair donor.

Jennifer Zhou 1A

AX3E2 is T shaped. There are 5 electron densities regions, so we can see consider it as trigonal pyramidal with 2 bonding pair changed into lone pair. Changing the pairs on the trigonal planar is more stable, hence resulting the T-shaped. I think this picture shows the shape clearly.

Jennifer Zhou 1A

This is really cute!! (More of a biology joke though

Jennifer Zhou 1A

Since this is the midterm week, I just wondering if there is still homework due this week?
If there is, still due on Thursday July 11?

Jennifer Zhou 1A

sorry can someone explain how to do this question? I don't really know where to begin. 1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to t...

CHEMISTRY COMMUNITY

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final review Fe(OH2)6 3+???

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homework 9C7 7th edition

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homework 9C1 (c)

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homework this week?

7th edition 1A.15