CHEMISTRY COMMUNITY

Hayley Hammons 1L

What C do we use if only volume is changing and temperature and pressure are constant? (for a monatomic ideal gas?)

Hayley Hammons 1L

When the molecule consists of alkyl groups alone, the double and triple bonds take priority in numbering. When a functional group is added, such as -OH in alcohols, the carbon attached to the -OH takes priority and is numbered as the first carbon. This is due to the idea that the alcohol functional ...

Hayley Hammons 1L

Since when do substituents take priority? I thought double and triple bonds always took priority in numbering over substituents. Or is this only true when the substituents are alkyl groups?

Hayley Hammons 1L

The suffix -ylium means that the -yl group is in isolation, making one atom positively charged, which must be specified. For example, +CH3 is methylium, and (CH3)2CH+ is propan-2-ylium.

Hayley Hammons 1L

What are the 'R' groups or atoms that are part of the Lewis structure for ketones and aldehydes?

Hayley Hammons 1L

Br is a larger molecule than F-, giving it a larger atomic radius and a larger bonding region where the valence electrons are further away from the nucleus, allowing for easier polarization. This ease in polarization increases the likelihood that the valence electrons can be used to form a sigma bon...

Hayley Hammons 1L

Why is entropy negative for many aqueous ions listed in Appendix 2A of the textbook?

Hayley Hammons 1L

Oh I see, that makes perfect sense now. Thanks!

Hayley Hammons 1L

Referring to the original question, the solution manual should have used Cv=5/2R instead of just R when calculating part b for ∆T. This correction is listed under solution manual errors on the Chemistry 14B website.

Hayley Hammons 1L

Q: Hydrochloric acid oxidizes zinc metal in a reaction that produces hydrogen gas and chloride ions. A piece of zinc metal of mass 8.5g is dropped into an apparatus containing 800.0mL of 0.500M HCl(aq). If the initial temperature of the hydrochloric acid solution is 25ºC, what is the final temperatu...

Hayley Hammons 1L

Cell potential is a measure of the cell's ability to do work. For two half reactions, (oxidation and reduction) you can take the potential (E) of each and find the difference between them to see if the reaction can do work. If the difference you calculate is positive (+VE), then the redox reaction o...

Hayley Hammons 1L

Why do you need a special electrode (ion-selective) to measure the pH of a solution in a redox reaction?

Hayley Hammons 1L

From example 8.6: Calculate the final temperature and the change in internal energy when 500. J of energy is transferred as heat to 0.900 mol O2 gas at 298K and 1.00 atm at (a) constant volume and (b) constant pressure. Treat the gas as ideal. In the book it says that part b requires two steps: heat...

Hayley Hammons 1L

How is degeneracy used to predict the likelihood that a system will be in a particular state?

Hayley Hammons 1L

What conditions make the enthalpy of a reaction standard?

Hayley Hammons 1L

In homework problem 12.117 the question states "write the equilibrium constant for the reaction and calculate the value of K at 298K for the reaction HNO2(aq) + NH3(aq) <--> NH4+(aq) + NO2-(aq) using the data in tables 21.1 an 12.2. From the tables, we know that Ka of HNO2 is 4.3E-4 and the Kb ...

Hayley Hammons 1L

If an atom in a molecule is a radical, having one unpaired electron, is it still included in hybridization?
For example, if a carbon has three of its valence electrons bonded to other atoms, and its fourth valence electron stands alone unpaired, does carbon have a sp^2 or sp^3 hybridization?

Hayley Hammons 1L

Yes, I read the textbook and takes notes on information that comes up in the course reader. It takes a while but I find it really helpful for memory because you're writing down key concepts and it provides great examples and explanations that I can associate with concepts to help me remember them. I...

Hayley Hammons 1L

In what cases can we assume that x makes a negligible difference when calculating change in concentration for a molecule in an equilibrium expression? When can we ignore it so that it makes the math of calculating change for other molecules in the reaction easier?

Hayley Hammons 1L

How do inert gasses affect chemical equilibrium?

Hayley Hammons 1L

1. write ligands in alphabetical order
2. write metal
3. write oxidation state

Hayley Hammons 1L

What is the conceptual reasoning that explains why ligands can bond to transition metals?

Hayley Hammons 1L

When writing the electron configuration for an atom with electrons in the d-orbital, how do you know whether the s or d orbital will fill first? For example, why is chromium written as 3d5 4s1 instead of 3d4 42s?

Hayley Hammons 1L

Why are all energies negative in the Schrödinger equation for energy of an electron?

Hayley Hammons 1L

How do you determine the bond angle of a compound?

Hayley Hammons 1L

Under what conditions is the 3d orbital written before the 4s orbital when writing election configurations?

CHEMISTRY COMMUNITY

Search found 26 matches

Re: Cv and Cp

Re: Naming priority between double bond and functional group

Re: (E)-3-Chloro-4-fluoro-7-methyloct-3-en-5-yne

Re: What is -ylium?

'R' Groups

Re: polarizability/nucleophiles

Entropy of Aqueous Ions

Re: Homework Question 8.99

Re: Heat Capacity of a Monoatomic Ideal Gas (9.13)

Homework Question 8.99

Re: Potentil Difference

Ion-Selective Electrodes

Calculating the Energy Changes When Heating an Ideal Gas

Degeneracy

Standard Enthalpy

Finding K for an Acid/Base Reaction

Hybridization and Radicals

Re: Reading the textbook

Ignoring x in Chemical Equilibrium

Inert Gasses

Re: Naming

Ligands and Transition Metal Bonding

D-orbitial electron configuration

Negative electron energy

VESPR bond angles

Election Configuration - d orbital