CHEMISTRY COMMUNITY

004624886

Does increasing the amount of solid in a galvanic cell change the cell potential? Such as in the equation Na2S(s)+Cd[2+](aq)=CdS(aq)+2Na[+](aq) I would assume that, because of the Nernst Equation, the cell potential should not change because changing the amount of solid would not change Q, is this r...

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Why does NO have a greater residual entropy than BF3 @ 0K?

004624886

When there is both a functional group as well as a double bond in a Carbon structure, which is given priority?

004624886

let's say that instead of isopropyl, I decided to name my substituent using IUPAC naming rules and named it 1-methylethyl. If I was sorting this in alphabetical order amongst other substituents, would I base it off of the "M" in methyl or "E" in ethyl since ethyl is the parent (s...

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What is the difference between an SN2 reaction and a Friedal-Crafts alkylation if they both involve the addition of a nucleophile onto an organic compound?

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Why are SCN- and CN- Ambident Nucleophiles?

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After a reaction where a nucleophile "donates" electrons to a electrophile, can the nucleophile then become an electrophile? can something be a nucleophile and an electrophile?

004624886

On Question 7 of the 2013 Midterm we are asked to balance a redox reaction. When balancing however it is required we use H+ to balance out the water molecules, but it is not stated explicitly whether the reaction is occurring under acidic or basic conditions. Are we to assume that it is always under...

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When creating a cell diagram where the reactants and products are not solid, how do I know whether to use Pt or Graphite?

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When using the Nernst equation, if I have some reactants and products that involve concentrations using molarity and others that use partial pressures, is there any conversions I need to make?

004624886

When calculating the final temperature of a system using initial temperatures of the objects involved, heat capacities, and masses, must we always convert the temperature from Celsius to Kelvin from the start?

004624886

Is any work done in free expansion? And if not, because there is no change in internal energy, would it mean that there is no heat and therefore q=0 for the surroundings, so there is no entropy change due to delta S= q/T? Also would the change in entropy of the system be the same in a reversible pat...

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If a questions says a system is at constant pressure, that would mean that volume is changing, would that mean that we can assume internal pressure = external pressure?

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Would Hess's Law, Bond Enthalpies, and Standard Enthalpies of Formation all be appropriate ways of finding Reaction Enthalpies, but we use one based on the information provided to us in the question?

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Can I use the Henderson-Hasselbalch equation when I have a weak acid that is being titrated by a strong base, but not all the way to the stoichiometric point? I guess my real question would be, is the HH equation valid when the volume (and thus molarity) of a system is changing (if I were to calcula...

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If I were filling out the Molecular Orbital Diagram for B2- (Two Borons with a -1 charge) I would have 7 valence electrons. The Homo would be one of the pi2p orbitals since one (either the pi2px or pi2py) contains an unpaired electron. However, I was wondering would the LUMO be considered the other ...

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Could an aqueous solution of an amphiprotic molecule act as a buffer?

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I just wanted to make sure, once an acid loses its proton, it becomes its conjugate base, and once a base accepts a proton it becomes its conjugate acid?

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When trying to figure out the pressure of an entire system as a whole, do you simply add partial pressures? if you do, do you multiply the partial pressures of each compound by the amount of moles first?

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Would the shape of a coordination compound only be dependent on regions of electron density? For example if there were two bidentates bound to TM, would its shape still be tetrahedral and would everything else (coordination number, shape, # of ligands, etc.) be the same as if I had 4 monodentates bo...

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So when a chemical reaction is at equilibrium, that just means k remains constant? So if you were to measure "Q" it would equal K?

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I know how polarization works in molecules when they have certain shapes and molecular structures in terms of the electronegativity differences between atoms, but I was wondering what the rule is for molecules that have a pair of electrons that are not bonded (loose electrons)? For example, in ozone...

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Does hybridization happen to all p-block elements, and if so, what would it look like in an oxygen atom with two sigma bonds and 2 lone pairs of electrons?

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What is the Effective Nuclear Charge and what does it depend on?

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The negative result simply means that the electron went from a higher energy level, to a lower energy level, releasing radiation. However, you should view the energy itself as a positive value.

CHEMISTRY COMMUNITY

Search found 25 matches

Cell potential

Residual Entropy

Priority In Numbering

Order of substituents

SN2 vs Friedal-Crafts Alkylation

Ambident Nucleophile

Electrophiles and Nucleophiles

Q7 2013 Midterm

Cell Diagrams

Nernst Equation Concentrations.

Calculating final temperature of a system

Change in Entropy for reversible vs irreversible expansion

Systems at constant pressure

When to use each method

When to use the Henderson-Hasselbalch Equation

LUMO and HOMO

Amphiprotic Molecules

Conjugate acids and bases

Total Pressure of a System

Shape when dealing with polydentates

Equilibrium

Polarization of a molecule with loose electrons

Hybridization

Effective Nuclear Charge

Re: Lecture Question