CHEMISTRY COMMUNITY

Elyssa Smith 4B

Does anyone know which of the ligands on the ligand naming sheet Lavelle gave us are polydentate and require the "bis, tris, tetrakis.." naming?

So far I have: EDTA, ethylene diamine, diethylene triamine, oxalato and carbonato. Are any of these errors/ should I add any?

Elyssa Smith 4B

I know that group 1 and 2 metal hydroxides are strong bases, but what about metal oxides? I know it's been said that Li₂O is a strong base, but is this an exception to the list of strong bases?

Elyssa Smith 4B

Today in Lavelle's review, he said that we know the electron cannot be inside the nucleus of an atom because the calculated uncertainty in the velocity was greater than the speed of light. Why are we comparing it to the speed of light? Also, if it were smaller than 3x10^8, could it then be found ins...

Elyssa Smith 4B

What are the units for energy in the E=hv equation? Is it Joules or Joules/photon?

Elyssa Smith 4B

What does it mean to "describe the interpretation of atomic orbitals in terms of probability?" (this is an objective on the quantum outline and I don't understand what it means)

Elyssa Smith 4B

When something asks for the conjugate acid of a molecule like CH3NH2, how do you know where to add the hydrogen to (can you explain general terms)? Also, if you are adding to a molecule like C6H5O-, how would you know to add the H to the O and not to the existing H's? (this makes C6H5OH and NOT C6H6O)

Elyssa Smith 4B

On the chemical bonds outline at the very bottom, it says we should know the parameters that contribute to the intermolecular energy (E is proportional to $-\alpha 1 * \alpha 2/r^6$ ). Can someone explain what this means and when we would use it?

Elyssa Smith 4B

More protons means lower pH which means a stronger acid? Correct?

Elyssa Smith 4B

Is water an amphoteric compound?

Elyssa Smith 4B

Is water an amphoteric compound?

Elyssa Smith 4B

So all Lewis acids are Bronsted acids but not all Bronsted acids are Lewis acids?

Elyssa Smith 4B

When asked which atom was the lewis acid or base, should you include the charge if it has one? Or is just saying copper (for example) sufficient?

Elyssa Smith 4B

If asked to show the electron configuration for an atom, would you have to be asked specifically for hybridization or is there certain cases where you should know to use hybridization?

Elyssa Smith 4B

Can someone explain why adding an electron to the atomic p orbital requires less energy than adding it to the hybridized orbital?

Elyssa Smith 4B

How can you figure out the hybridization of sigma and pi bonds? How do the hybridization's differ if something is double bonded and has sigma and pi bonds?

Elyssa Smith 4B

What's the best way to identify if something is a coordination compound?

Elyssa Smith 4B

Will we not get our test 2 grades back in discussion next week since some people don't have discussion for the thanksgiving holiday?

Elyssa Smith 4B

Dipoles only cancel for a tetrahedral if all the atoms bonded to the central atom are the same right? Is it possible for different atoms to cancel each other out?

Elyssa Smith 4B

If a molecule has hydrogen bonding, does that automatically mean it has dipole dipole too?

Elyssa Smith 4B

Should we know the value of the kJ/mol for each kind of bond? Like do we need to know that hydrogen bonding is -20kJ/mol or just know that h-bonding is fairly strong?

Elyssa Smith 4B

Is it only ion-ion if the two atoms involved show a charge? Basically, is NaCl ion-ion or would it need to be Na+ and Cl- to be ion ion?

Elyssa Smith 4B

Is HS more tightly bound or is HO? why?

Elyssa Smith 4B

So is induced dipole only equivalent with London/dispersion if two induced dipoles are attached (induced dipole-induced dipole)?

Elyssa Smith 4B

For hydrogen bonding to occur, can hydrogen only be bonded to O,N, or F? Or can it be bonded to those elements and another element in the same molecule?

Elyssa Smith 4B

What is an example of an ion dipole? I am confused how this IM force is possible

Elyssa Smith 4B

Is ion-ion the same thing as ionic bonding? If not, what is the difference?

Elyssa Smith 4B

Are covalent bonds an intermolecular force? Why or why not?

Elyssa Smith 4B

How does high polarizability and high polarizing power lead to a more covalent bond? What is the relationship between these?

Elyssa Smith 4B

If lone pairs cause bonds to be weaker, does having more sets of lone pairs make a bond more and more weak? Or is it just the presence of lone pairs in general?

Elyssa Smith 4B

If polarizability increases down and left, does polarizing power increase up and right?

Elyssa Smith 4B

What is the trend for dissociation energy? Is there a trend at all?

Elyssa Smith 4B

Does polarizability follow the same trend as atomic size? Are there any exceptions? Why do they follow the same trend?

Elyssa Smith 4B

Do we need to know coordination compounds for the midterm? If so, to what extent?

Elyssa Smith 4B

Can someone explain radicals and how they fit into octet exceptions?

Elyssa Smith 4B

Why is disassociation energy always positive?

Elyssa Smith 4B

How do you know when a dipole moment occurs between two atoms?

Elyssa Smith 4B

What is an induced dipole and how do you identify it?

Elyssa Smith 4B

In a dipole moment, does the arrow always point from the positively charged atom to the negatively charged atom?

Elyssa Smith 4B

Are valence electrons the same thing as valence of an atom? How does all this relate to covalent bonds?

Elyssa Smith 4B

What determines bond strength? Is this a value you can calculate?

Elyssa Smith 4B

Can someone explain why removing the 2nd electron is harder?

Elyssa Smith 4B

As someone who in unfamiliar with chemistry, what periodic trends are the most important for this class?

Elyssa Smith 4B

What is are cations and anions and why are they important?

Elyssa Smith 4B

Can someone explain how light is able to affect an electron's momentum and position but not a baseball? Does it relate to size or mass or both?

Elyssa Smith 4B

When will we know to use the Heisenberg equation? Will the question say something about indeterminacy or should we use it when asked for momentum and position at all?

Elyssa Smith 4B

I'm confused how light, energy, and photons are all related? Can you have a photon of light and a photon of energy? Is light a source of energy?

Elyssa Smith 4B

I'm not familiar with momentum. In the Heisenberg equation will we ever have to solve for momentum or will it be given?

Elyssa Smith 4B

What does it mean for an electron to have wavelike and particle like properties?

Elyssa Smith 4B

What do 'h' and 'c' represent in the worked example from last lecture? Where do these numbers come from and how do we solve for them?

Elyssa Smith 4B

What is meant by 'energy needed to remove an electron'? Does this value vary and how would we know how much energy is needed?

Elyssa Smith 4B

What exactly is a photon and how does it relate to electrons in the photoelectric effect?

Elyssa Smith 4B

What is the work function and which part of the equation from class represents the work function?

Elyssa Smith 4B

What does it mean for variables to be 'quantized' or 'discrete'?

Elyssa Smith 4B

I know that the fraction of molarity is: moles of solution over volume of solution, but what does molarity actually represent and when would I need to calculate it?

Elyssa Smith 4B

Is the molar mass calculated from the periodic table or does it have to be given? What is actually meant by molar mass?

Elyssa Smith 4B

Is the limiting reactant the one with the smallest number of moles? I am confused on how to tell which one actually limits the reaction

Elyssa Smith 4B

When solving for the limiting reactant, what step follows directly after calculating moles of each molecule? Also can you explain the next few steps and why they matter?

Elyssa Smith 4B

Can someone explain when we know to write answers in powers of 10 and when it's not necessary?

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