CHEMISTRY COMMUNITY

FrankieClarke2C

Since the ideal gas law only applies to gases, does that mean we can just ignore the non-gases?

FrankieClarke2C

do all molecules follow the same type of basic shape as the water graph?

FrankieClarke2C

Can we assume A will be 1 unless the question specifies that we have to solve for it?

FrankieClarke2C

Are all First Order Reactions decay functions

FrankieClarke2C

What is the relationship between the second order and it's rate?

FrankieClarke2C

Does it matter if time is in min/sec/hr if the question doesn't specifically state what it wants?

FrankieClarke2C

When finding rate laws and rate constants that usually have mmol in the units, do we always want to convert? In the textbook, it doesn't convert mmol in problem 14.17, but does convert them in problem 14.19.

FrankieClarke2C

Why is it a zero order reaction with slope -k if the straight line fits to the data?

FrankieClarke2C

How are you able to tell what the intermediate is and why can't it exist in the rate law?

FrankieClarke2C

How do you know which elements are increasing in reducing power?

FrankieClarke2C

Is the anode always on the left of the salt bridge and the cathode is always on the right side in a cell diagram

FrankieClarke2C

Why is it that when no work is being done Delta H equals Delta U.

FrankieClarke2C

If a reaction has a higher activation energy, does this mean that the reaction is slower?

FrankieClarke2C

For the reaction, 2H+(aq) + 2e- = H2(g), why is the standard cell potential always 0?

FrankieClarke2C

Why does maximum work of a battery = delta G at constant temperature and pressure?

FrankieClarke2C

To calculate oxidation state in half reactions. Do you just multiply the charges by the coefficient to find the total oxidation state?

FrankieClarke2C

What is the difference between an adiabatic system and an isothermal system?

FrankieClarke2C

Is the change in internal energy for irreversible expansion always 0?

FrankieClarke2C

why we can assume that deltaH and deltaS are constant when using the Van't Hoff equation to calculate K at different temperatures?

FrankieClarke2C

When calculating work, is it negative only when it is expanding? Would it be positive when it isn't?

FrankieClarke2C

How is Ecell calculated just by looking at the half reactions?

FrankieClarke2C

are there any states of matter in which molecules (solid, liquid, aqueous) in a chemical equation that you would exclude when calculating reaction enthalpy or entropy?

FrankieClarke2C

In an isolated system, are we assuming that it is constant volume?

FrankieClarke2C

Are bomb calorimeters considered vacuums?

FrankieClarke2C

Is it important for us to know how Calorimeters for future problems?

FrankieClarke2C

How do you account for temp in an equation when the neutral water is not 25 degrees C, what changes do you make to the equation?

FrankieClarke2C

Is there any trick to memorize the strong acids vs the weak or is it mainly just memorization?

FrankieClarke2C

Why do we ignore liquids calculating Q? I was doing problem 11.13 and was confused how they got that answer for part a

FrankieClarke2C

When we were talking about that one example that had to do with pressure, why did we use Q instead of Kp to calculate the new pressure?

FrankieClarke2C

For the ADP example in class, to get the final EQ concentration for the ADP and Pi did he just subtract final from initial to get the concentration?

FrankieClarke2C

How is trigonal planar considered non polar?

FrankieClarke2C

For naming what is the concept of putting "bis" for polydentate ligands?

FrankieClarke2C

If we didn't know if it was tridentate or anything, but knew it wasn't bidentate could be put chelate and theoretically get credit?

FrankieClarke2C

How can the lewis structure of NO3- be modified according to the quantum theory of bonding?

FrankieClarke2C

Under what circumstances would two waves produce destructive interference?

FrankieClarke2C

How many electrons are required to completely fill the 5th shell?

FrankieClarke2C

How many electrons are required to completely fill the 5th shell?

FrankieClarke2C

Considering the 5th shell of an atom, how many orbitals would it contain?

FrankieClarke2C

Explain how Heisenberg's uncertainty principle is related to the concept of indeterminism?

FrankieClarke2C

How do you determine if a bond disassociates easily?

FrankieClarke2C

How does the equilibrium change with temperature?

FrankieClarke2C

How do you know which way the equilibrium will shift?

FrankieClarke2C

For the overall picture what does knowing the Bond angle help you with?

FrankieClarke2C

I know you're supposed to always put the most electronegative element as the central atom, but what is the actual reason for this?

FrankieClarke2C

In what scenario would knowing the strength and kj-mol of the bonds be helpful? For example if i know its dipole to dipole, how would knowing its strength in relation to a ion-ion bond help?

FrankieClarke2C

Is molecular shape determination just a matter of memorization of different bonds and lone pairs?

FrankieClarke2C

Are there any quick ways to remember hybridization in relation to bond number?

FrankieClarke2C

Did he mention if we need to know this for the midterm?

FrankieClarke2C

How did they determine that the minimum oxidation number for chlorine was -1?

FrankieClarke2C

How would start the problem 2.93 in the sixth edition?

FrankieClarke2C

How are the exceptions to electron configuration determined? It explains in the textbook why they set up the configuration in certain elements this way but what differentiates copper and another metal?

FrankieClarke2C

For part c it asks you to calculate the wavelength of the energy that was used to eject the electron from the metallic surface. I thought you would just take the energy and plug it into the equation, however, they plugged the energy from part b into the kinetic energy equation. They then used this n...

FrankieClarke2C

Lavelle did say that in class, I'm not sure either if there's just two ways to do it or if one way is wrong

FrankieClarke2C

Hi syd,
The first homework was on fundamentals but now it'll just follow the general outline.
hope that helps ;)

FrankieClarke2C

The most important thing to me, is not writing every single thing down. Whether you take notes on a laptop or on a notepad, filtering through what is useful and what is not is the most important factor in retaining knowledge.

FrankieClarke2C

On the board it was stated that a negative sign means bound e- has lower energy than free e-. What is meant by "bound electron" vs "free electron"

FrankieClarke2C

Will we have to know how to determine the molarity of an acid by titration?

FrankieClarke2C

While looking at this equation: Fe2O3(s)+ 3 CO2(g) ------> 2 Fe(s) + 3 CO2(g)
it implies that 2 mol Fe ~ 1 mol Fe2O3

How does this imply that 2 mol of iron equals 1 mol of the compound?

FrankieClarke2C

How is it that Carbon became the basis for Avogadro's number? Whenever it's explained, they always take 12 g of carbon to determine Avogadro's number but how is that universally applied?

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