CHEMISTRY COMMUNITY

Juanalv326

Unless it specifically states to use mass, you can assume to use moles or just go ahead and use mcdeltaT, m meaning for mass

Juanalv326

You can either have the subsititution or addition reaction where one reactant is substituted for another compared to addition where one is broken off than the other is added once a certain reactant left

Juanalv326

Yeah, unless otherwise given in another form

Juanalv326

You also have to take into account that there are different Cp for the different states matter

Juanalv326

https://goldbook.iupac.org/html/P/P04933.html

This explains the meaning of a psuedo rate law, which ultimately is a concentration of one reactant thats greater than the other

Juanalv326

Would there ever be a problem in which we have the forward reaction rate constant, equilibrium K, and have to solve for the reverse reaction?

Juanalv326

What does it mean when you have a second order reaction and you double its rate or even triple, what would occur.

Juanalv326

What does this term mean, and what would be the molecule or item that represents it?

Juanalv326

What is a shortcut we can remember on finding out what the units for k would be.

Juanalv326

Why would we use the ideal gas constant over the Cp or Cv if Volume is included?

Juanalv326

Why did the white bear dissolve in water?

Because it was polar

Juanalv326

Lost an Electron,
You really have to keep an ion them

Juanalv326

Dubstep Titration: Drop the Base

Juanalv326

How do you know how to solve for the reducing agent and oxizing agent for the reaction, O3/O2,OH and O3, H+/O2

Juanalv326

If the Frequency factor is not given, however you are given two K's what equation would you use?

Juanalv326

What do you call an Acid with attitude?

A mean-oh Acid

Juanalv326

What kind of dogs do chemists have?

Laboratory Dogs

Juanalv326

I don't trust atoms....
They make up everything

Juanalv326

You can review the tectbook also. Page 642, shows the different derivations of the arrhenius equation.

Juanalv326

The equation is represented as lnk2-lnk1=Ea/R(1/T2-1/T1).

K does infact equal k over k prime, however in this case we are using the arrhenius equation manipulated so that lnA is removed.

Juanalv326

When would we know when to use the different work equations such as -PDV or -nRTlnV2/V1 or DU. How would we be able to deduce one equation from a problem per se.

Juanalv326

Remember. Tfinal-Tinital, even though there are changes, ultimately you will go back down to the same temperature, so your response would become 0.

Juanalv326

I kind of had a similar outline, but it wasnt as neat and clean, But thank you! Great REview for the final.

Juanalv326

The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJmol1 to 75 kJmol1 . (a) By what factor does the rate of the reaction increase at 298 K, all other factors being equal? How would this problem be done? I know we would hav...

Juanalv326

I'd tell you a chemistry joke, but all the good ones argon.

Juanalv326

What show do cesium and iodine love to watch together?

CsI

Juanalv326

Wait, nevermind I got it. I simply need to find volume using the area of circle and multiply by the distance. The convert to liters and plug it back into my equation.

Juanalv326

Air in a bicycle pump is compressed by pushing in the handle. If the inner diameter of the pump is 3.0 cm and the pump is depressed 20. cm with a pressure of 2.00 atm, (a) how much work is done in the compression? What needs to be done in order to get the correct answer. I know that we need to use t...

Juanalv326

What is the purpose of the particles in a box? The equation seems very confusing, but is it essential to understand the fundamentals of it for future references?

Juanalv326

What is the purpose of the particles in a box? The equation seems very confusing, but is it essential to understand the fundamentals of it for future references?

Juanalv326

Is this actually important to know for the test or would it not be covered?

Juanalv326

Hybridization can be remembered like this.

sp has two bonds from the central atom, sp2 has 3 bonds, and sp3 has 4 bonds.

Juanalv326

Think about the steric number of the compound. So if it is an Sn of 5 then break it down to three bonds and 2 lone pairs making it a T- shape.

Juanalv326

Buffer solutions will not be on the exam correct?

Juanalv326

Another way of saying it is that -logpH=10^(-pH), so because you saw that the 10^ is (-7) it means that the pH is 7

Juanalv326

What about if your photon were to be absorbed at the highest energy at a ground state hydrogen? What would be the value of n?

Juanalv326

https://www.youtube.com/watch?v=P8d4WoXDLYM

This is a link that'll help with remembering the vsepr models! hope you guys enjoy, it definitely helps.

Juanalv326

Hey!,

Can the solutions be posted for the final please! Thank you.

Juanalv326

For the reaction PCl5(g) Δ PCl3(g) Cl2(g), Kc 1.1 x10^-2 at 400. K. (a) Given that 1.0 g of PCl5 is placed in a 250.-mL
reaction vessel, determine the molar concentrations in the mixture at equilibrium.

How would you solve, I did convert, however answer doesn't appear to be correct.

Juanalv326

Is it possible to represent Q and K graphically? Such as products and reactants over time to show the change that they represent?

Juanalv326

No we don't need to understand how to solve it. Much rather we simply need to understand what Shrodingers is and what it's application was. It's more conceptual than mathematical.

Juanalv326

What is the electron configuration of Rh3+?

Juanalv326

Geiger counters can detect radioactivity because nuclear radiation consists of particles and radiation of suffi ciently high energy to knock electrons out of atoms. Consequently, this type of radiation is called “ionizing radiation.” What is the longest wavelength of radiation that can be detected b...

Juanalv326

What is the minimum uncertainty in the position of a hydrogen atom in a particle accelerator given that its speed is known to within 5.0 ms1?

Would you take the weight of hydrogen atom from its atomic mass in kilograms?

Juanalv326

2.39 Determine whether each of the following electron confi gurations represents the ground state or an excited state of the atom given.

What are the explanations and how would you do this?

Juanalv326

Infrared spectroscopy is an important tool for studying vibrations of molecules. Just as an atom can absorb a photon of suitable energy to move an electron from one electronic state to another, a molecule can absorb a photon of electromagnetic radiation in the infrared region to move from one vibrat...

Juanalv326

Are there any shortcuts that may be useful for remembering the quantum numbers? Something that may come in handy?

Juanalv326

A solution is prepared by dissolving 0.500 g of KCl, 0.500 g of K2S, and 0.500 g of K3PO4 in 500. mL of water. What is the concentration in the fi nal solution of (a) potassium ions; (b) sulfi de ions?

Juanalv326

Vanillin is found in vanilla extracted from Mexican orchids. A report on the analysis of vanillin listed the mass percentage composition as 63.15% C, 5.30% H, and 31.55% O. In what atom ratios are the atoms present in vanillin?.

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