## Search found 19 matches

Sat Mar 05, 2016 5:06 pm
Forum: *Ethers
Topic: number of shared bonds in ethers
Replies: 1
Views: 404

### Re: number of shared bonds in ethers

It can only have single bonds with the carbons, my guess would be because if it gets a double or triple bond with one of the carbons that changes the formal charge of oxygen which could change the function of the molecule so they would classify it as something else.
Sat Mar 05, 2016 5:00 pm
Forum: *Alkynes
Topic: Alkene and Alkyne
Replies: 2
Views: 872

### Re: Alkene and Alkyne

I believe they have equal priority and that the name is decided based upon whether the alkene or alkyne is closest to the beginning of the chain.
Mon Feb 08, 2016 2:53 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 2
Views: 478

### Re: Galvanic Cells

Ideally they are supposed to be otherwise they wouldn't be galvanic cells since the purpose of a galvanic cell is to generate volts. If the cell potential was negative then it wouldn't be able to generate volts since cell potential represents the spontaneity of a reaction (positive means the reactio...
Mon Feb 08, 2016 2:42 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: ln K equation
Replies: 2
Views: 433

### Re: ln K equation

It should be included in the equation?
Sat Feb 06, 2016 11:45 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Cell Potential Pattern
Replies: 1
Views: 358

### Re: Standard Cell Potential Pattern

You can probably tell based off of ionization energy (the energy required to remove an electron) the less energy it requires the more likely it is to give up an electron or "oxidize." The trend for ionization energy is increases as you go across the table and decreases as you go down a gro...
Sun Jan 31, 2016 11:47 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Inert Conductors as Electrodes
Replies: 1
Views: 240

### Re: Inert Conductors as Electrodes

Because it is inert it is used to measure the Electrode potential of half-cells through a process named Standard Hydrogen Electrode. So its used to obtain those values we use for calculating the potential of the entire Redox Reactions.
Sun Jan 31, 2016 11:35 pm
Forum: Phase Changes & Related Calculations
Topic: Steepness of Heating Curve?
Replies: 4
Views: 2934

### Re: Steepness of Heating Curve?

It depends on joules and temperature because they are the x and Y axis of the graph, so if the the specific heat of a substance requires a lesser amount of joules to raise its temperature by a degree then it will have a steeper incline.
Sun Jan 24, 2016 11:22 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy
Replies: 1
Views: 355

### Re: Entropy

So a state function means you only really care about the results and not so much the process. So when we look for entropy its usually the change in entropy because we only care about the overall change from the initial reactants to the products. You don't necessarily care if the entropy increased th...
Sun Jan 24, 2016 11:17 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Replies: 1
Views: 505

The general concept of it is that a reaction is occurring without the system losing any heat so you know that the change in internal energy is just to the "work" on or in the system so you would use (delta)U=W instead of (delta)U= Q + W. As for how to know that the system is adiabatic you ...
Sat Jan 09, 2016 5:30 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard State
Replies: 1
Views: 1138

### Re: Standard State

There isn't really a universal rule for determining when something is in it's standard state, the only real way know them is to know just general trends. Examples include how most of the halogens are diatomic in their standard state like F2 or Cl2. However you also have to check they are in the righ...
Tue Dec 01, 2015 1:48 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Pkb
Replies: 1
Views: 536

### Re: Pkb

It is correct, the reason why is because a lower pkB indicates a higher pkA and pKA correlates to pH. So the lower the pkB, the higher the pKA which means a higher pH indicating a stronger Base.
Fri Nov 20, 2015 5:05 pm
Forum: Amphoteric Compounds
Topic: Table of Oxides (Basic, Amphoteric, and Acidic)
Replies: 1
Views: 453

### Table of Oxides (Basic, Amphoteric, and Acidic)

This is a table describing which oxides are basic, amphoteric, or acidic.
Fri Nov 20, 2015 4:16 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Methane classification
Replies: 3
Views: 623

### Re: Methane classification

I'm not sure it could be really considered either as it's a gas and not soluble in water so it would never really be involved in an Acid-Base reaction, but if I had to make a guess it would probably be a weak acid because it only has Hydrogens to lose. Still I wouldn't consider it either.
Tue Oct 20, 2015 2:29 pm
Forum: Octet Exceptions
Topic: BeCl2 LEWIS STRUCTURE
Replies: 1
Views: 1312

### Re: BeCl2 LEWIS STRUCTURE

It doesn't have 4 valence electrons, the reason being is because the bonds between beryllium and chlorine are ionic which means its transferring (giving up) its two electrons opposed to sharing them (one to each chlorine atom.)
Wed Oct 07, 2015 12:42 am
Forum: Properties of Electrons
Topic: Multi-Electron Atoms
Replies: 1
Views: 456

### Re: Multi-Electron Atoms

The term shielding is used to describe the differences in electrostatic interactions between the nucleus and electrons. This is because the outer electrons are separated from the nucleus by both distance and the inner electrons. So in summary the inner electrons are being pulled with more strength o...
Fri Oct 02, 2015 11:43 pm
Forum: Properties of Electrons
Topic: Balmer, Lyman, and other series
Replies: 1
Views: 433

### Re: Balmer, Lyman, and other series

You choose which series to use based off wavelength, for example here is a diagram that shows you the range of Lyman and the Balmer series.
Fri Oct 02, 2015 4:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8205
Views: 1433768

### Re: Chemistry Jokes

Are you full of beryllium, gold, and titanium? Because you are Be-Au-Ti-full!
Fri Oct 02, 2015 4:42 pm
Forum: Photoelectric Effect
Topic: Clarification on description of a photon
Replies: 1
Views: 326

### Re: Clarification on description of a photon

Discrete can mean distinct or specific so in terms of the photoelectric effect it means that photons can only come with specific values of energy. You can relate this to how Professor Lavelle mentioned that there are specific lines for wavelengths since they correlate to energy.
Fri Oct 02, 2015 4:25 pm
Forum: DeBroglie Equation
Topic: 1.39
Replies: 1
Views: 406

### Re: 1.39

The mass of an electron is on the formula sheet (back of the periodic table) however I don't see the mass of the protons and neutrons on the back, so I would recommend memorizing their values as a precaution. Furthermore memorizing the values could allow you to continuously work without stopping to ...