CHEMISTRY COMMUNITY

Heidi Ibarra Castillo 1D

I assume if they give you grams you use m, if moles then youd use n.

Heidi Ibarra Castillo 1D

the unit change is all the same no matter whether in Celsius or Kelvin in this case

Heidi Ibarra Castillo 1D

regular calorimeter=reaction takes place in the water, bomb calorimeter=reaction takes place in a sealed metal container.

Heidi Ibarra Castillo 1D

you can determine it by the equilibrium constant k

Heidi Ibarra Castillo 1D

excercises from where exactly?

Heidi Ibarra Castillo 1D

^ it implies it is at equilibrium so yes you are able to use the ICE table

Heidi Ibarra Castillo 1D

^ yes solids should not be included

Heidi Ibarra Castillo 1D

Yes it will shift to the sides with more moles due to more volume and less pressure

Heidi Ibarra Castillo 1D

^yes those are the ones !

Heidi Ibarra Castillo 1D

Kc, you must convert moles of the reactants to pressure values using PV=nRT the ideal gas law

Heidi Ibarra Castillo 1D

you can use it to find the pH or the pOh

Heidi Ibarra Castillo 1D

catalyst ahs no effect on equilibrium

Heidi Ibarra Castillo 1D

^A conjugate acid is a base with a hydrogen ion added to it, a conjugate base is what is left over after an acid has donated a proton

Heidi Ibarra Castillo 1D

^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic

Heidi Ibarra Castillo 1D

^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic

Heidi Ibarra Castillo 1D

it usually will let you know , however you can also assume if it is at a constant T

Heidi Ibarra Castillo 1D

yes you can use it, but it is mostly used for specific chemical rxns

Heidi Ibarra Castillo 1D

depending which R you used is also dependent on the units you have, at the end most should be able to cancel all out

Heidi Ibarra Castillo 1D

since there is no delta v , your delta v would be 0 so your overall work would also be 0

Heidi Ibarra Castillo 1D

^ yes reversible reactions are generaly theorectical, majority will always be irreversible

Heidi Ibarra Castillo 1D

the first two are definitely the same equation

Heidi Ibarra Castillo 1D

do we use w= -nRT only when a specific reaction occurs?

Heidi Ibarra Castillo 1D

does the instantaneous rate changes as the reaction proceeds for most reactions?

Heidi Ibarra Castillo 1D

the unique average rate is the average rate divided by the stoichiometric coefficient of the species monitored?

Heidi Ibarra Castillo 1D

The average rate of a reaction is the change in concentration of a species divided by the time over which the change takes place?

Heidi Ibarra Castillo 1D

Is the standard cell potential always cathode - anode?

Heidi Ibarra Castillo 1D

I believe the units for a zero order reaction is M/s

Heidi Ibarra Castillo 1D

When delta G is equal to 0 it means it is at equilibrium?

Heidi Ibarra Castillo 1D

when it is negative, it means it is sponatenous right?

Heidi Ibarra Castillo 1D

Is a bomb calorimeter an example of isometric/osochoric?

Heidi Ibarra Castillo 1D

^yes, exactly you would need to see the overall charge of the coordination compound first then add the overall charges within the ligands in order to find the oxidation state of the metal. However, keep in consideration the cations or anions if there are any outside the coordination compound.

Heidi Ibarra Castillo 1D

i believe both are acceptable since it was barely changed

Heidi Ibarra Castillo 1D

oxalate would have to use these prefixes due to it being bidentate

Heidi Ibarra Castillo 1D

you only add when the complex ion is an anion

Heidi Ibarra Castillo 1D

However, the pi form between the p-orbitals of two atoms and secure the top and bottom of an atom in place so there can be no rotation occurring

Heidi Ibarra Castillo 1D

Sigma bonds bond end to end, allowing the rotation to occur

Heidi Ibarra Castillo 1D

the two pi bonds should be drawn next to each other because they prevent rotation

Heidi Ibarra Castillo 1D

The sigma bonds have a greater overlap

Heidi Ibarra Castillo 1D

^H2Se does have dipole dipole forces

Heidi Ibarra Castillo 1D

H2Se has the higher boiling point due to having a larger mass and more electrons

Heidi Ibarra Castillo 1D

yes, an ion-ion is greater

Heidi Ibarra Castillo 1D

Which forces are responsible for condensed phase(liquid& solid)?

Heidi Ibarra Castillo 1D

Why does Na+ not affect pH?

Heidi Ibarra Castillo 1D

So a salt containing a base will raise solution pH?

Heidi Ibarra Castillo 1D

So if light is emitted, it means delta E will be negative right ?

Heidi Ibarra Castillo 1D

Why is HCl a stronger acid than HF?

Heidi Ibarra Castillo 1D

well we know our ms will always be -1/2 or +1/2 because each orbital can only hold 2 electrons, however i don't think there's a way to identify whether its the - or + value

Heidi Ibarra Castillo 1D

^I believe it is because they don't obtain 8 electrons, so they don't need to have a full octet

Heidi Ibarra Castillo 1D

so it is based off the attraction of the protons and electrons?

Heidi Ibarra Castillo 1D

thank you !

Heidi Ibarra Castillo 1D

How do you determine your V, L , and S?

Heidi Ibarra Castillo 1D

^yeah I believe changing around the area of double bond won't result in losing the electron.

Heidi Ibarra Castillo 1D

Why are the e- in resonance structures delocalized?

Heidi Ibarra Castillo 1D

Does anyone know how to solve this problem?

Heidi Ibarra Castillo 1D

Yeah exactly, frequency is usually italicized with a curve to it where as velocity is just a regular lower case v. It might be confusing at first to depict it from the equations, but they do have different appearances.

Heidi Ibarra Castillo 1D

Does anyone know how to go on solving part b and c for this problem?

Heidi Ibarra Castillo 1D

Example: Write the electron configurations of a. copper (|) ion b. copper (||) ion
When finding the electron configuration how do you know how many electrons to remove?

Heidi Ibarra Castillo 1D

So, since the concentration basically needs 1/5 of the starting NaOH solution , does it mean I would need to add four volumes of water to one volume of the 2.5 mol*L^-1 solution? I divided the 60 by 5 and got 12.0 mL. So I got that 12.0 mL of 2.5 mol*L^-1 of the solution is added to the 48.0 mL of w...

Heidi Ibarra Castillo 1D

The question states: It appears that balancing the chemical equation Cu+SO2 -> CuO + S would be simple if we could just add another O atom to the product side. Why is that procedure not allowed? I stated you can't add the O atom because it is not produced by the defined reaction but I am unsure if t...

Heidi Ibarra Castillo 1D

How would I go upon answering the question?
Question: An experiment requires the use of 60.0 mL of 0.50 M NaOH(aq). The stock room assistant can only find a reagant bottle of 2.5 M NaOH(aq). How can the 0.50 M NaOH(aq) be prepared?

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