CHEMISTRY COMMUNITY

Gobinder Pandher 3J

My discussion's TA advised that either way would probably be ok.

Gobinder Pandher 3J

When we are asked to identify the ligands in a coordination compound, would we write the charge of the ligand as well?

Gobinder Pandher 3J

Yeah Emily is right. My discussion's TA taught us that biological compounds with lone pairs (typically from N or O) would act as polydentates. However, he suggested that memorizing table 17.4 should suffice.

Gobinder Pandher 3J

If the question gives you the pressures for all of the substances in the reaction (both the reactants and products), calculate Q and compare Q to K. If Q > K then X will be negative for the products and positive for the reactants as the reaction favors the formation of reactants. If Q < K then X wil...

Gobinder Pandher 3J

Yes, Ethan is correct. Also remember the same goes for linear, trigonal planar, tetrahedral, square planar, trigonal bipyramidal, and octahedral configurations. Make sure all the binding atoms are the same!!

Gobinder Pandher 3J

Also, it helps to remember that a molecule is only nonpolar if it is linear, trigonal planar, tetrahedral, square planar, trigonal bipyramidal, or octahedral. However, in order for a molecule to be nonpolar, the binding atoms must also all be the same!!

Gobinder Pandher 3J

Another thing to remember is that if the symbol of the metal originates from a Latin name (as listed in appendix 2D), it will have a unique name. For example, an anionic compound with "Fe" would have the name "------ferrate" NOT "------ironate". This is stated in toolbo...

Gobinder Pandher 3J

In his module, Dr. Lavelle also stated that solvents are not used in equilibrium constant calculations as their change in concentration would be extremely insignificant.

Gobinder Pandher 3J

Also, solvents are not included when finding the equilibrium constant as their change in concentration would be extremely insignificant due to their excess.

Gobinder Pandher 3J

I believe we will lose points if we do not specify that the bond angle is less than a certain degree. From the practice problems, all answers stated less than or an exact angle.

Gobinder Pandher 3J

Dr. Lavelle stated during lecture that you do NOT need to draw the Lewis Structure to reflect the molecular shape. It would be very beneficial to do so but it is not required.

Gobinder Pandher 3J

Typically for organic molecules like this, the compound is bonded how it is written. So H is bonded to O then to C and then to O.

Gobinder Pandher 3J

If a certain Lewis Structure has an uneven distribution of charges (uneven distribution defined as not all atoms having a formal charge of 0) then the most electronegative atom will typically have a negative formal charge. A TA explained that this would depict a more stable resonance as the more ele...

Gobinder Pandher 3J

The central atom does not necessarily need to have a formal charge of 0. However, having the central atom have a formal charge of 0 will typically lead to an balanced/favored Lewis Structure.

Gobinder Pandher 3J

The formal charge does not always need to equal 0 for the Lewis Structure to be favorable. If the compound has an overall charge (for example, OH^-) then the overall formal charge between all elements will be -1. What makes a Lewis Structure favorable is its ability to have the lowest formal charge ...

Gobinder Pandher 3J

Typically, if we need to know, the atomic radii will be given to us already. In my high school chemistry class, if we ever compared the different ionization energies between two elements these values were usually given to us (either on the back of our periodic table or in the problem). I'd assume th...

Gobinder Pandher 3J

Another way to see it is as atomic radius increases, ionization energy decreases. Since the atomic radius of elements increases as we move down a group and towards the left side of a period, it is safe to assume that the ionization energy, the energy required to remove an electron from an atom, decr...

Gobinder Pandher 3J

I agree with MitchellMologne. Although subtle, the question did ask for the energy of a single atom. A great way to tell if you need to calculate energy for a single atom is to look at the units they give for the work function. In this case it was KJ/mol. The "mol" aspect can be an indicat...

Gobinder Pandher 3J

Here's an equation to help visualize it. (Energy of Photon)>(Work Function) ======> (Ejection of Electron). Note that if the energy of the incoming photon IS greater than the work function, then the ejected electron will have excess energy (aka kinetic energy).

Gobinder Pandher 3J

Yeah, Christy is right. You are more than likely to obtain whole numbers for your molecular formula. If this doesn't happen, chances are you made an error during your calculation.

Gobinder Pandher 3J

Molarity is defined as the moles of solute per liter of solution. I don't think you'll ever see molarity as moles/mL. I hope this helps.

CHEMISTRY COMMUNITY

Search found 21 matches

Re: Memorizing all the names???

Identifying Ligands

Re: Polydentates

Re: ICE Box

Re: When can a tetrahedral be non polar? [ENDORSED]

Re: Ch 4 Question 75

Re: Naming Coordination Compounds

Re: solvents in K

Re: Chemical Equilibrium

Re: Bond Angle answers

Re: Lewis Structures and VSEPR Shape

Re: atomic structure of HOCO

Re: Formal charge and most electronegative element

Re: Formal Charge For Element In The Middle [ENDORSED]

Re: Formal Charge

Re: Across a period vs. Down a group

Re: Ionization Energy

Re: Difference Between Work Function and the Energy Required to Remove an Electron from one Atom [ENDORSED]

Re: Work Function [ENDORSED]

Re: Calculating ratios when finding molecular formulas [ENDORSED]

Re: Molarity unit [ENDORSED]