Search found 25 matches
- Tue Aug 01, 2017 7:30 pm
- Forum: Bronsted Acids & Bases
- Topic: Determining an acid and base
- Replies: 1
- Views: 411
Determining an acid and base
What are some ways to determine if we have a weak base/acid and strong base/acid without having to memorize them?
- Tue Aug 01, 2017 2:39 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changing the Temperature
- Replies: 2
- Views: 446
Changing the Temperature
Does changing the temperature affect the K/equilibrium ratio? If so, how?
- Mon Jul 31, 2017 10:28 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Difference Between Kp and Kc
- Replies: 4
- Views: 1267
Difference Between Kp and Kc
What is the essential difference between Kp and Kc?
- Mon Jul 31, 2017 7:12 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Solids and Liquids in Equilibrium
- Replies: 2
- Views: 380
Solids and Liquids in Equilibrium
Why are solids and liquids not included in the K expression/equilibrium constant?
- Sun Jul 30, 2017 2:28 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: pKa vs Ka
- Replies: 3
- Views: 703
pKa vs Ka
What is the difference between pKa and Ka?
- Sat Jul 29, 2017 8:01 pm
- Forum: Amphoteric Compounds
- Topic: How to determine amphoteric compounds
- Replies: 5
- Views: 30435
How to determine amphoteric compounds
How can we tell if a compound is amphoteric? What characteristics can we look for to determine that its amphoteric?
- Sat Jul 29, 2017 6:52 pm
- Forum: Lewis Acids & Bases
- Topic: Determining the Lewis Acid/Base
- Replies: 2
- Views: 419
Determining the Lewis Acid/Base
How can we determine the lewis acid and lewis base in a proton transfer equilibrium without having to draw the lewis structure?
- Fri Jul 28, 2017 4:38 pm
- Forum: Conjugate Acids & Bases
- Topic: What exactly are conjugate acids and base? [ENDORSED]
- Replies: 8
- Views: 3326
What exactly are conjugate acids and base? [ENDORSED]
I understand how to find the conjugate acids and bases but I am having a difficult time understanding what they are conceptually. What are conjugate acids and base?
- Sun Jul 23, 2017 9:10 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Clarification on Equilibrium Concept
- Replies: 1
- Views: 297
Clarification on Equilibrium Concept
I am still having a difficult time understanding equilibrium conceptually. What does it mean for a reaction to be at equilibrium?
- Sun Jul 23, 2017 9:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Direction of reaction when Q<K and Q>K
- Replies: 2
- Views: 381
Direction of reaction when Q<K and Q>K
How can we tell what direction does the reaction favor when Q<K and Q>K?
- Sun Jul 23, 2017 9:00 pm
- Forum: Ideal Gases
- Topic: Pressure and Concentration in PV=nRT
- Replies: 2
- Views: 1060
Pressure and Concentration in PV=nRT
What is the relationship between pressure and concentration in the formula PV=nRT?
- Sun Jul 23, 2017 8:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What is Kc and Q?
- Replies: 1
- Views: 424
What is Kc and Q?
What is the difference between Kc and Q since solving for both uses the same formula [product/reactant]?
- Sun Jul 16, 2017 10:37 pm
- Forum: Resonance Structures
- Topic: Delocalized
- Replies: 2
- Views: 529
Delocalized
I understand that resonance is a blending of structures so when an electron is involved in a resonance structure, what does it mean for it to be delocalized?
- Sun Jul 16, 2017 9:40 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizable
- Replies: 2
- Views: 534
Polarizable
What does it mean for an atom to be highly polarizable?
- Sun Jul 16, 2017 6:41 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: What does the formal charge tell us?
- Replies: 3
- Views: 880
What does the formal charge tell us?
I understand that the formal charge indicates gain or loss of electrons, so does this mean that if I get a formal charge of +1 then 1 electron has been loss? Can I get clarification.
- Sun Jul 16, 2017 6:02 pm
- Forum: Lewis Structures
- Topic: P, S, Cl can have more than 8 electrons?
- Replies: 2
- Views: 848
P, S, Cl can have more than 8 electrons?
Why can phosphorus, sulfur, and chlorine exceed more than 8 electrons?
- Tue Jul 11, 2017 9:22 pm
- Forum: Trends in The Periodic Table
- Topic: 1st and 2nd ionization energy? [ENDORSED]
- Replies: 7
- Views: 9993
1st and 2nd ionization energy? [ENDORSED]
What is the difference between the first ionization energy and the second ionization energy?
- Sun Jul 09, 2017 3:58 pm
- Forum: Photoelectric Effect
- Topic: Energy in kj or j when solving a problem?
- Replies: 10
- Views: 1997
Energy in kj or j when solving a problem?
Just for clarification. When solving a photoelectric effect problem, if the threshold energy is given in kj should it be converted to j when finding the kinetic energy?
- Sun Jul 09, 2017 3:49 pm
- Forum: DeBroglie Equation
- Topic: Deriving DeBroglie Equation
- Replies: 2
- Views: 534
Deriving DeBroglie Equation
How is the DeBroglie wavelength equation derived from E=pc and E=h(frequency)?
- Sun Jul 09, 2017 3:44 pm
- Forum: DeBroglie Equation
- Topic: Should velocity always be in m.s. when solving? [ENDORSED]
- Replies: 11
- Views: 1934
Should velocity always be in m.s. when solving? [ENDORSED]
When solving for the DeBroglie wavelength, should the velocity always be in m.s? I was working on a problem where the velocity was given in km hr and I was not sure if I needed to convert it into m.s.
- Sun Jul 09, 2017 12:00 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: What level did electron begin? (Post module problem)
- Replies: 2
- Views: 733
What level did electron begin? (Post module problem)
An excited hydrogen atom emits light with a frequency of 1.14 x 1014 Hz to reach the energy level n = 4. In what principle quantum level did the electron begin? I am not too sure how to approach this problem. Can I get steps on how to solve it?
- Sun Jul 02, 2017 8:42 pm
- Forum: Limiting Reactant Calculations
- Topic: Concept Question on Percent Yield
- Replies: 1
- Views: 580
Concept Question on Percent Yield
What exactly is the percent yield and what does it represent? I understand that the theoretical yield is how much product is made when all the reactant is used and the actual yield is the actual amount of product produced but I am not too sure what exactly is the percent yield.
- Sun Jul 02, 2017 8:34 pm
- Forum: Limiting Reactant Calculations
- Topic: Clarification on the Actual Yield
- Replies: 1
- Views: 546
Clarification on the Actual Yield
When calculating the percent yield, is the actual yield usually given in the problem/question?
- Fri Jun 30, 2017 12:05 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Volume in Liters [ENDORSED]
- Replies: 2
- Views: 452
Volume in Liters [ENDORSED]
When solving for the molarity and the volume is given in ml, do we always convert our volume to liters?
- Thu Jun 29, 2017 11:58 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity Equations
- Replies: 1
- Views: 256
Molarity Equations
How can we indicate when to use the equations (Minitial)(Vinitial)=(Mfinal)(Vfinal) or Molarity=moles/volume when approaching a problem?