Search found 25 matches

by Jennifer1E
Tue Aug 01, 2017 7:30 pm
Forum: Bronsted Acids & Bases
Topic: Determining an acid and base
Replies: 1
Views: 208

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?
by Jennifer1E
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: 244

Changing the Temperature

Does changing the temperature affect the K/equilibrium ratio? If so, how?
by Jennifer1E
Mon Jul 31, 2017 10:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Difference Between Kp and Kc
Replies: 4
Views: 501

Difference Between Kp and Kc

What is the essential difference between Kp and Kc?
by Jennifer1E
Mon Jul 31, 2017 7:12 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solids and Liquids in Equilibrium
Replies: 2
Views: 191

Solids and Liquids in Equilibrium

Why are solids and liquids not included in the K expression/equilibrium constant?
by Jennifer1E
Sun Jul 30, 2017 2:28 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa vs Ka
Replies: 3
Views: 365

pKa vs Ka

What is the difference between pKa and Ka?
by Jennifer1E
Sat Jul 29, 2017 8:01 pm
Forum: Amphoteric Compounds
Topic: How to determine amphoteric compounds
Replies: 3
Views: 6644

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?
by Jennifer1E
Sat Jul 29, 2017 6:52 pm
Forum: Lewis Acids & Bases
Topic: Determining the Lewis Acid/Base
Replies: 2
Views: 229

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?
by Jennifer1E
Fri Jul 28, 2017 4:38 pm
Forum: Conjugate Acids & Bases
Topic: What exactly are conjugate acids and base? [ENDORSED]
Replies: 8
Views: 776

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?
by Jennifer1E
Sun Jul 23, 2017 9:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Clarification on Equilibrium Concept
Replies: 1
Views: 153

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?
by Jennifer1E
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: 213

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?
by Jennifer1E
Sun Jul 23, 2017 9:00 pm
Forum: Ideal Gases
Topic: Pressure and Concentration in PV=nRT
Replies: 2
Views: 378

Pressure and Concentration in PV=nRT

What is the relationship between pressure and concentration in the formula PV=nRT?
by Jennifer1E
Sun Jul 23, 2017 8:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: What is Kc and Q?
Replies: 1
Views: 224

What is Kc and Q?

What is the difference between Kc and Q since solving for both uses the same formula [product/reactant]?
by Jennifer1E
Sun Jul 16, 2017 10:37 pm
Forum: Resonance Structures
Topic: Delocalized
Replies: 2
Views: 338

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?
by Jennifer1E
Sun Jul 16, 2017 9:40 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizable
Replies: 2
Views: 291

Polarizable

What does it mean for an atom to be highly polarizable?
by Jennifer1E
Sun Jul 16, 2017 6:41 pm
Forum: Formal Charge and Oxidation Numbers
Topic: What does the formal charge tell us?
Replies: 3
Views: 464

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.
by Jennifer1E
Sun Jul 16, 2017 6:02 pm
Forum: Lewis Structures
Topic: P, S, Cl can have more than 8 electrons?
Replies: 2
Views: 399

P, S, Cl can have more than 8 electrons?

Why can phosphorus, sulfur, and chlorine exceed more than 8 electrons?
by Jennifer1E
Tue Jul 11, 2017 9:22 pm
Forum: Trends in The Periodic Table
Topic: 1st and 2nd ionization energy? [ENDORSED]
Replies: 7
Views: 959

1st and 2nd ionization energy? [ENDORSED]

What is the difference between the first ionization energy and the second ionization energy?
by Jennifer1E
Sun Jul 09, 2017 3:58 pm
Forum: Photoelectric Effect
Topic: Energy in kj or j when solving a problem?
Replies: 10
Views: 580

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?
by Jennifer1E
Sun Jul 09, 2017 3:49 pm
Forum: DeBroglie Equation
Topic: Deriving DeBroglie Equation
Replies: 2
Views: 287

Deriving DeBroglie Equation

How is the DeBroglie wavelength equation derived from E=pc and E=h(frequency)?
by Jennifer1E
Sun Jul 09, 2017 3:44 pm
Forum: DeBroglie Equation
Topic: Should velocity always be in m.s. when solving? [ENDORSED]
Replies: 11
Views: 831

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.
by Jennifer1E
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: 314

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?
by Jennifer1E
Sun Jul 02, 2017 8:42 pm
Forum: Limiting Reactant Calculations
Topic: Concept Question on Percent Yield
Replies: 1
Views: 314

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.
by Jennifer1E
Sun Jul 02, 2017 8:34 pm
Forum: Limiting Reactant Calculations
Topic: Clarification on the Actual Yield
Replies: 1
Views: 369

Clarification on the Actual Yield

When calculating the percent yield, is the actual yield usually given in the problem/question?
by Jennifer1E
Fri Jun 30, 2017 12:05 am
Forum: Molarity, Solutions, Dilutions
Topic: Volume in Liters [ENDORSED]
Replies: 2
Views: 298

Volume in Liters [ENDORSED]

When solving for the molarity and the volume is given in ml, do we always convert our volume to liters?
by Jennifer1E
Thu Jun 29, 2017 11:58 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity Equations
Replies: 1
Views: 188

Molarity Equations

How can we indicate when to use the equations (Minitial)(Vinitial)=(Mfinal)(Vfinal) or Molarity=moles/volume when approaching a problem?

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