CHEMISTRY COMMUNITY

Kavee Dodampahala 4E

Is it ok to use to use the second one?

Kavee Dodampahala 4E

What does Kw represent?

Kavee Dodampahala 4E

Can someone explain how to name the transition metal when the complex is positive, negative, and neutral overall?

Kavee Dodampahala 4E

How do double and triple bonds work with hybridization?

Kavee Dodampahala 4E

What is the difference between the cis and trans forms of a molecule?

Kavee Dodampahala 4E

Where does ion - dipole fit into this?

Kavee Dodampahala 4E

It is alphabetical but without considering the prefixes (bi, tri, etc.)

Kavee Dodampahala 4E

To determine if salt is acidic or basic you need to look at the ions it produces. Tables 6D.1 and 6D.2 in the text book list which cations and anions are acidic or basic.

Kavee Dodampahala 4E

Why can B(OH)3 act as a lewis acid and accept another OH when boron normally forms only 3 bonds?

Kavee Dodampahala 4E

Why is HF not a strong acid even though fluorine is very electronegative?

Kavee Dodampahala 4E

How can you tell what is amphoteric just by looking at the formula of the compound?

Kavee Dodampahala 4E

When do we use the prefixes bis, tris, tetrakis, pentakis, etc?

Kavee Dodampahala 4E

I don't this we need to know specific examples, just have a general understanding of how coordination compounds are biologically significant.

Kavee Dodampahala 4E

The shape of the ligand is based on the VSEPR shape around the central atom. By knowing the shape of the ligand, you can see how it could possible bind to the metal in what locations, and then figure out the general shape of the complex as a whole.

Kavee Dodampahala 4E

The subspecies names should be listed in alphabetical order (not including the prefixes like mono, di, etc). Then add on the prefixes based on how many of one subspecies there are, for example: (CN)3 would be tricyano. Then the metal name should be listed. If the compound has an overall negative cha...

Kavee Dodampahala 4E

To add on, another example of an amphoteric compound is H2O.

Kavee Dodampahala 4E

Is a chelate just any polydentate ligand that has the ability to form a ring?

Kavee Dodampahala 4E

I think in discussion this week, or in your TA's office hours if your discussion is during break.

Kavee Dodampahala 4E

I agree that SO2 would have the higher boiling point for the reasons above. Intermolecular forces are what is important in this instance, not intramolecular bonds.

Kavee Dodampahala 4E

I think it would help if you thought about the molecule in three dimensions. It would have a tetrahedral shape and so regardless of how the lewis structure is drawn, in real life, from any perspective, one side of the molecule would have the two hydrogens and the others would have the two chlorines,...

Kavee Dodampahala 4E

Larger molecules also have more electrons in general which makes them more polarizable.

Kavee Dodampahala 4E

I think it would be good to know for the future, regardless if we need to know it now.

Kavee Dodampahala 4E

The electron pair geometry is based only on how many regions of electron density there are around the atom (whether it is a bonding pair or lone pair is irrelevant). If a molecule has 2 regions of electron density, then the electron density is linear, if there is 3: trigonal planar, 4: tetrahedral, ...

Kavee Dodampahala 4E

Can someone explain how coordinate bonds and ligands work?

Kavee Dodampahala 4E

I believe the final is cumulative.

Kavee Dodampahala 4E

Trigonal planar has just three areas of electron density. Trigonal pyramidal has four areas of electron density, one of those areas being a lone pair.

Kavee Dodampahala 4E

The opposite is true. The molecular structures influence the dipole moment.

Kavee Dodampahala 4E

I went and talked to my TA.

Kavee Dodampahala 4E

To make sure a lewis structure is at its lowest energy you should calculate the formal charge for each atom. The lewis structure with the most formal charges closest to zero is the most stable and has the lowest energy.

Kavee Dodampahala 4E

Can someone explain why the more electronegative element gets the radical? In my mind, it would make more sense for the less electronegative one to have it.

Kavee Dodampahala 4E

To see if an ionic or covalent bond would from you should look at the difference in electronegativity between the two atoms involved in the bond. If the electronegativity difference is greater than than 2 then an ionic bond will form. If the electronegativity difference is less than 1.5 then a coval...

Kavee Dodampahala 4E

What does it mean for an electron to be distorted in a bond?

Kavee Dodampahala 4E

Formal charge is the most important in determining the most stable structure.

Kavee Dodampahala 4E

I don't think so because that was on the last page of notes and he said that content would not be covered on the midterm.

Kavee Dodampahala 4E

Could someone further clarify the answer to this question? I'm still confused about how to figure out the number of valence electrons for transition metals.

Kavee Dodampahala 4E

You should look at the number of valence electrons the element has based on its position in the periodic table. For example, sulfur has 6 valence electrons and so would gain 2 more electrons to have a full octet. Gaining 2 electrons would then make a -2 ion.

Kavee Dodampahala 4E

You would find ml from l.

Kavee Dodampahala 4E

You would write out all the values like -2, -1, 0, 1, 2, because those are the values, not 5.

Kavee Dodampahala 4E

I know that both can exist at the same time in a molecule.

Kavee Dodampahala 4E

You should also look at if the spins are all in the same direction for an orbital filled with just parallel electrons to make sure it is in the ground state.

Kavee Dodampahala 4E

Is a wave function just the set of the four quantum numbers of an electron?

Kavee Dodampahala 4E

According to Hund's rule, every orbital must have one electron before each orbital has a pair of electrons. The number of electrons before you can start pairing depends on the orbital. For example, in a p subshell if there was only 3 electrons, they would all be parallel. However, if there was 4 ele...

Kavee Dodampahala 4E

Why do chemists enjoy working with ammonia? Because it's pretty basic stuff.

Kavee Dodampahala 4E

An electron does not actually spin "up" or "down" these are just words we use to describe 2 different states.

Kavee Dodampahala 4E

Going to the step up sessions or making your own study group could be helpful!

Kavee Dodampahala 4E

When writing out electron configurations out, there are 2 formats you can use. The first format is writing it all out, for example the electron configuration for lithium would be writing as 1s2 2s1. The second format is naming the past noble gas before the element and just writing the configuration ...

Kavee Dodampahala 4E

If no one laughs at your chem jokes, keep going until you get a reaction.

Kavee Dodampahala 4E

I remember my TA saying that you should have the exact answer if a problem was done correctly so you would get a point off if it was a little off.

Kavee Dodampahala 4E

I also believe you would not be deducted points for that. However, I do remember it was mentioned that you should put your answer in the most logical unit.

Kavee Dodampahala 4E

Reading the textbook helps me understand the concepts at my own pace. I find it really useful!

Kavee Dodampahala 4E

I was wondering the same thing

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