CHEMISTRY COMMUNITY

PranaviKolla2B

Would a decrease in temperature accordingly lower the value of k?

PranaviKolla2B

Which one, 3/2R or 5/2R, corresponds with constant volume and which corresponds with constant pressure?

PranaviKolla2B

Why is that? Why is the anode reaction reversed?

PranaviKolla2B

What are the labels of a first order reaction?

PranaviKolla2B

It is based on the bonds formed and the bonds that are broken. I believe it is (but can someone confirm): the more bonds that are formed - the more exothermic; the more bonds broken - the more endothermic (generally, not always).

PranaviKolla2B

Since it takes a certain amount of time to become half of the original value (its half life), it would take double the half-life to get to 1/4 of the original amount.

PranaviKolla2B

Do we need to know what examples of common catalysts are?

PranaviKolla2B

Also, can someone explain what each term means in the Arrhenius equation, please?

PranaviKolla2B

Just to confirm, the slowest step is the rate-determining step?

PranaviKolla2B

Why is the slowest step the rate determining step?

PranaviKolla2B

Does someone have a good video or link explaining the difference between first order and second order reactions in terms of what is actually happening in the reactions rather than the math associated with either?

PranaviKolla2B

Another helpful tip is when looking at the cell diagram, the left side of both the cathode and the anode is the reactants and the right side of both is consequently the products. That is why anode is usually used as the product and cathode as the reactant!

PranaviKolla2B

Does the Arrhenius equation simply tell us the effect of temperature on the rate constant?

PranaviKolla2B

What else are the functions of catalysts, besides lowering the activation energy?

PranaviKolla2B

I believe that when the states are the same, you can use commas in place of single lines; whereas, when the states are different, you use single lines.

PranaviKolla2B

How do you find spectator ions in a half reaction?

PranaviKolla2B

Does someone have a good video explaining how to find a first order reaction vs a second?

PranaviKolla2B

Is voltage negative when the gibbs free energy is positive?

PranaviKolla2B

What is the electromotive force of a cell?

PranaviKolla2B

Can someone define what exactly a standard cell potential is?

PranaviKolla2B

Are you asking about half reactions?

PranaviKolla2B

Could someone explain how the reducing agent and the oxidizing agent relate to the half reactions of a redox reaction?

PranaviKolla2B

Could someone explain what exactly E is?

PranaviKolla2B

Does anyone have a good video or link explaining this?

PranaviKolla2B

Also, how do you know which is being reduced and which is being oxidized?

PranaviKolla2B

What defines an anode?

PranaviKolla2B

What is the difference between a calorimeter and a bomb calorimeter?

PranaviKolla2B

Oxidation means that it lost electrons and reduction means that it gained electrons.

PranaviKolla2B

Does anyone have any helpful links explaining reversible and irreversible processes in relation to work equations?

PranaviKolla2B

Yes, I believe your latter question demonstrates the correct method.

PranaviKolla2B

K means that the system is in equilibrium and Q means that it is not.

PranaviKolla2B

Oxidation is loosing electrons and reduction is gaining electrons.

PranaviKolla2B

Does anyone have a good link explaining extensive properties versus intensive properties with examples?

PranaviKolla2B

Intensive properties do NOT depend on mass, while extensive properties do depend on mass.

PranaviKolla2B

Also, what does it mean that enthalpy is always heat but heat is not always enthalpy?

PranaviKolla2B

What are microstates?

PranaviKolla2B

Can someone explain what it means when the reaction shifts one way or another?

PranaviKolla2B

What exactly does it mean for a process to be reversible?

PranaviKolla2B

Can someone explain the process of calculating bond enthalpies after drawing the structures?

PranaviKolla2B

Does anyone have any good videos explaining enthalpy and the related equations?

PranaviKolla2B

Does anyone have any good videos explaining combustion reactions?

PranaviKolla2B

Does anyone have any good videos explaining entropy?

PranaviKolla2B

What is the difference between a stand calorimeter and a bomb calorimeter?

PranaviKolla2B

Can someone please define Hess's Law?

PranaviKolla2B

Can someone please define molar heat capacity?

PranaviKolla2B

What is the most accurate way to calculate H?

PranaviKolla2B

Can someone do the same with all the equations regarding enthalpy and entropy?

PranaviKolla2B

What does each term relate to in the equation deltaG= deltaH-T*deltaS?

PranaviKolla2B

I believe it will be a lot greater than 1 because there will be an abundance of products compared to reactants; therefore the Ka will be extremely large.

PranaviKolla2B

What is the difference between first protonation and second protonation?

PranaviKolla2B

What are spectator ions and how do they affect pH?

PranaviKolla2B

What is the Van't Hoff equation?

PranaviKolla2B

If the temperature were to change, how would Kw change in response?

PranaviKolla2B

How do we calculate the pH of a buffer solution? Are there any good videos explaining this?

PranaviKolla2B

What are partial pressures?

PranaviKolla2B

What is the difference between Kc and Kp?

PranaviKolla2B

How exactly do you use ICE tables?

PranaviKolla2B

What exactly is Le Chatelier's principle?

PranaviKolla2B

What is homogenous equilibrium?

PranaviKolla2B

I believe this relates to titrations so I think it will be covered later on!

PranaviKolla2B

When using the equation to find the uncertainty in velocity, is the diameter the uncertainty in position?

PranaviKolla2B

Is CO3^2- polydentate?

PranaviKolla2B

Since ammonia is a weak base, how come ammonium (its conjugate acid) is not a strong acid?

PranaviKolla2B

The number of numbers after the decimal when finding pH should be equal to the number of sig figs.

PranaviKolla2B

When does water act as an acid and when does it act as a base?

PranaviKolla2B

Why is formic acid stronger than acetic acid?

PranaviKolla2B

Does that mean that strong bases form stable cations?

PranaviKolla2B

What is the definition of an Arrhenius base?

PranaviKolla2B

What is the definition of a Bronsted Acid versus a Lewis acid?

PranaviKolla2B

What is the definition of a Bronsted Acid versus a Lewis acid?

PranaviKolla2B

What is a coordination complex?

PranaviKolla2B

Many times (not always), if there are lone pairs around the central atom, the atom is polar right? What are the exceptions to this rule?

PranaviKolla2B

Does someone have a video or online tutorial that explains this well?

PranaviKolla2B

Is a Lewis acid stronger or weaker than a Bronsted acid, or are they just two different ways of defining acids?

PranaviKolla2B

What is the difference between a Bronsted acid and a Lewis acid?

PranaviKolla2B

Do you mean in terms of naming compounds?

PranaviKolla2B

Do bases always have to have an OH group?

PranaviKolla2B

Can hydrogen bonding only occur if an H atom is bonded with a N, O, or F atom?

PranaviKolla2B

Atoms that have pi bonds stay in the same plane I believe.

PranaviKolla2B

On a related note, resonance structures basically mean that the molecule exists in a structure that is a mix of all the possible structures right?

PranaviKolla2B

When H is bonded to any other atoms besides those listed above, what type of IF is present?

PranaviKolla2B

Which intermolecular force is the strongest?

PranaviKolla2B

What factors do determine bond angles?

PranaviKolla2B

Are the cations usually Lewis acids and the anions usually Lewis bases?

PranaviKolla2B

Can someone explain how to indicate dipole moments as well?

PranaviKolla2B

What exactly is a dipole?

PranaviKolla2B

What is the difference between polarizability and polarizing power?

PranaviKolla2B

I remember there being a table in the textbook that gives you relative bond strengths between different atoms.

PranaviKolla2B

I think for resonance structures we draw all the different possible structures.

PranaviKolla2B

How do you calculate formal charge again?

PranaviKolla2B

What is the trend of electronegativity in terms of the periodic table? Does electronegativity increase as you go towards the right of the periodic table?

PranaviKolla2B

For an element like calcium, would the electron configuration end in 4s^2? And what about for Ca^2+?

PranaviKolla2B

What is a coordinate covalent bond?

PranaviKolla2B

Is noble gas notation when we refer back to the previous noble gas on the periodic table and use it to stand in for its electron configuration (and then we continue to write the rest of the configuration for the element that we are working with)?

PranaviKolla2B

Just to confirm, we would draw all the up arrows first for a specific subshell and then start filling in all the down arrows right?

PranaviKolla2B

In terms of electrons, what is the difference between a triple bond, a double bond, and a single bond?

PranaviKolla2B

Can someone explain what it means to take an electron from the s subshell to stabilize the d subshell please?

PranaviKolla2B

Are anions larger than the atom and cations smaller, generally?

PranaviKolla2B

What is Hund's rule and what is its purpose?

PranaviKolla2B

When do you use schrodinger’s equation and what do you need to know about it?

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