Search found 51 matches

by Hector Acosta Discussion 1H
Fri Mar 16, 2018 3:09 pm
Forum: *Alkanes
Topic: The symbol R
Replies: 4
Views: 450

The symbol R

Does R just represent any molecule except for a hydrogen?
by Hector Acosta Discussion 1H
Fri Mar 16, 2018 3:08 pm
Forum: *Amines
Topic: Different types of Amines
Replies: 1
Views: 342

Different types of Amines

Will we need to know the different type of amines, like primary, secondary, and tertiary?
by Hector Acosta Discussion 1H
Fri Mar 16, 2018 3:07 pm
Forum: *Ketones
Topic: Carbonyls
Replies: 2
Views: 369

Carbonyls

Can someone explain to me the relationship between aldehydes, ketones, and carbonyls?
by Hector Acosta Discussion 1H
Fri Mar 09, 2018 4:09 pm
Forum: First Order Reactions
Topic: The integrated rate laws
Replies: 3
Views: 236

The integrated rate laws

There are so many ways to write the integrated rate law, which one is the best when solving for concentration final?
by Hector Acosta Discussion 1H
Fri Mar 09, 2018 4:08 pm
Forum: *Enzyme Kinetics
Topic: Enzymes
Replies: 8
Views: 585

Enzymes

I know enzymes and catalysis make the activation energy lower, which makes the rate faster. But why and how do they do this? And can someone give an example.
by Hector Acosta Discussion 1H
Fri Mar 09, 2018 4:06 pm
Forum: *Nucleophiles
Topic: Nucleophiles on the final?
Replies: 3
Views: 419

Nucleophiles on the final?

Today in lecture we talked a little bit about Nucleophiles, which is an organic chemistry concept, so I was wondering if these topics will be on the final. I thought professor Lavelle was not going to cover organic chemistry.
by Hector Acosta Discussion 1H
Thu Mar 01, 2018 5:34 pm
Forum: Zero Order Reactions
Topic: Catalysts
Replies: 2
Views: 149

Catalysts

What role does a catalyst play in a zero order reaction?
by Hector Acosta Discussion 1H
Thu Mar 01, 2018 5:30 pm
Forum: General Rate Laws
Topic: Reactions higher than the second order [ENDORSED]
Replies: 3
Views: 157

Reactions higher than the second order [ENDORSED]

Is there a way to graph reactions that are higher than the second order?
by Hector Acosta Discussion 1H
Thu Mar 01, 2018 5:28 pm
Forum: Second Order Reactions
Topic: The graph of second order [ENDORSED]
Replies: 5
Views: 247

The graph of second order [ENDORSED]

Can someone reiterate why the graph of a second order reaction has a positive slope?
by Hector Acosta Discussion 1H
Fri Feb 23, 2018 3:36 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: The rate of a reaction
Replies: 5
Views: 226

The rate of a reaction

Do other things play a role in how fast a reaction takes place or is it all dependent on kinetics?
by Hector Acosta Discussion 1H
Fri Feb 23, 2018 3:30 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 5
Views: 208

Galvanic Cells

Will galvanic cells always have a positive E nought value?
by Hector Acosta Discussion 1H
Fri Feb 23, 2018 3:29 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Determining N
Replies: 4
Views: 179

Determining N

When determining the exponent n does it matter which rate you put on top of the fraction and which one you place on the bottom?
by Hector Acosta Discussion 1H
Fri Feb 16, 2018 2:06 pm
Forum: Balancing Redox Reactions
Topic: Acidic Conditions
Replies: 2
Views: 86

Acidic Conditions

Do we always assume acidic conditions and also if the conditions are basic what does that mean?
by Hector Acosta Discussion 1H
Fri Feb 16, 2018 2:04 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst equation
Replies: 2
Views: 125

Nernst equation

In class Dr. Lavelle put a constant in the equation with log to replace the other constants, can you do the same with the ln equation and if you can what would it be?
by Hector Acosta Discussion 1H
Fri Feb 09, 2018 5:42 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: delta U [ENDORSED]
Replies: 10
Views: 393

delta U [ENDORSED]

If there is no change in temperature is 0?
by Hector Acosta Discussion 1H
Fri Feb 09, 2018 5:34 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy Concept
Replies: 1
Views: 98

Entropy Concept

Why is entropy always increasing in the universe?
by Hector Acosta Discussion 1H
Fri Feb 02, 2018 3:14 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isobaric [ENDORSED]
Replies: 3
Views: 174

Isobaric [ENDORSED]

Can someone explain to me what isobaric means and its relevance?
by Hector Acosta Discussion 1H
Fri Feb 02, 2018 3:13 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Van Hoff Equation
Replies: 3
Views: 133

Van Hoff Equation

Will we need to know how to derive other equations to get Van Hoff's equation?
by Hector Acosta Discussion 1H
Sat Jan 27, 2018 11:10 pm
Forum: Calculating Work of Expansion
Topic: The integral equation
Replies: 8
Views: 254

The integral equation

Why do we need an integral to calculate work?
by Hector Acosta Discussion 1H
Sat Jan 27, 2018 11:08 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: The second law ?
Replies: 3
Views: 124

The second law ?

Can someone explain to me the second law of thermodynamics?
by Hector Acosta Discussion 1H
Sat Jan 27, 2018 11:05 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: CV or CP
Replies: 5
Views: 201

CV or CP

When do we use CV and when do we use CP?
by Hector Acosta Discussion 1H
Fri Jan 19, 2018 3:23 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated system
Replies: 3
Views: 203

Isolated system

What are some things that can change the heat of an isolated system?
by Hector Acosta Discussion 1H
Fri Jan 19, 2018 3:22 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Open systems
Replies: 6
Views: 254

Open systems

Since so many things can affect open systems will we be dealing with them a bit?
by Hector Acosta Discussion 1H
Fri Jan 19, 2018 3:21 pm
Forum: Calculating Work of Expansion
Topic: work done on and by the system
Replies: 12
Views: 562

work done on and by the system

when is work lost, when the system does work or work is done on the system?
by Hector Acosta Discussion 1H
Sat Jan 13, 2018 11:07 am
Forum: Phase Changes & Related Calculations
Topic: Heat Curve of Water
Replies: 3
Views: 178

Re: Heat Curve of Water

I don't think Dr. Lavelle will expect us to remember the exact values but I think he does want us to know the concept.
by Hector Acosta Discussion 1H
Sat Jan 13, 2018 11:01 am
Forum: Phase Changes & Related Calculations
Topic: Endo and Exothermic Ways to Remember
Replies: 28
Views: 3021

Re: Endo and Exothermic Ways to Remember

This post has really helped me remember the difference between the two!
by Hector Acosta Discussion 1H
Sat Jan 13, 2018 10:56 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 3
Views: 147

Heat Capacity

Is there a way to find the heat capacity of a substance or will it always be given?
by Hector Acosta Discussion 1H
Fri Dec 08, 2017 7:14 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: PKa and Pkb vs Ka and Kb
Replies: 4
Views: 483

PKa and Pkb vs Ka and Kb

What is the difference between Pka and Ka, likewise what is the difference between Pkb and Kb? What does each one tell us?
by Hector Acosta Discussion 1H
Fri Dec 08, 2017 7:12 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH vs pOH
Replies: 2
Views: 204

pH vs pOH

What is the difference between pH and pOH? Which one tells us how basic and how acidic a substance is?
by Hector Acosta Discussion 1H
Fri Dec 01, 2017 11:00 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted Acid vs Lewis Acid [ENDORSED]
Replies: 3
Views: 204

Bronsted Acid vs Lewis Acid [ENDORSED]

Are there any other differences between the two acids except for the fact that by definition a lewis acid is an electron acceptor and a bronsted acid a proton donor?
by Hector Acosta Discussion 1H
Fri Dec 01, 2017 10:53 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strong acid vs weak acid [ENDORSED]
Replies: 7
Views: 342

Strong acid vs weak acid [ENDORSED]

What is the defining feature to know if something is strong acid or a weak acid?
by Hector Acosta Discussion 1H
Sat Nov 25, 2017 11:19 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chateliers Principle
Replies: 3
Views: 176

Le Chateliers Principle

Can someone explain this to me in simple terms I never learned it in high school and its still confusing to me.
by Hector Acosta Discussion 1H
Sat Nov 25, 2017 11:16 pm
Forum: Ideal Gases
Topic: Units for the formula
Replies: 4
Views: 387

Units for the formula

What units do we use for the PV=nRT formula
by Hector Acosta Discussion 1H
Sat Nov 18, 2017 12:57 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Defining a Ligand
Replies: 3
Views: 196

Defining a Ligand

I have no prior knowledge to what a ligand is so can someone please give me a very basic definition of it.
by Hector Acosta Discussion 1H
Sat Nov 18, 2017 12:55 am
Forum: Naming
Topic: TM naming
Replies: 2
Views: 202

TM naming

Can someone please explain in the most simple form possible on how we name these compounds.
by Hector Acosta Discussion 1H
Fri Nov 10, 2017 11:35 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity conversions [ENDORSED]
Replies: 3
Views: 201

Molarity conversions [ENDORSED]

How do I find the number of moles when I am given molarity and the volume of a solution.
by Hector Acosta Discussion 1H
Fri Nov 10, 2017 11:29 pm
Forum: Sigma & Pi Bonds
Topic: Triple Bonds question [ENDORSED]
Replies: 2
Views: 177

Triple Bonds question [ENDORSED]

Why does a triple bond have 1 sigma and 2 pi bonds instead of having 2 sigma and 1 pi bond?
by Hector Acosta Discussion 1H
Fri Nov 03, 2017 1:53 pm
Forum: *Shrodinger Equation
Topic: What does this even mean?
Replies: 4
Views: 507

What does this even mean?

Can someone please explain to me in simple words what this equation represents and how we would apply it?
by Hector Acosta Discussion 1H
Fri Nov 03, 2017 1:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Midterm
Replies: 8
Views: 378

Midterm

For the upcoming midterm will VSEPR be on the test?
by Hector Acosta Discussion 1H
Fri Nov 03, 2017 1:06 pm
Forum: Lewis Structures
Topic: Midterm
Replies: 4
Views: 192

Re: Midterm

Yes it will be so lets make sure we are all sharp on lewis dot structures.
by Hector Acosta Discussion 1H
Fri Oct 27, 2017 10:22 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Equal or greater than or equal to sign?
Replies: 3
Views: 213

Equal or greater than or equal to sign?

When we finish up a Heisenberg question do we put our final delta answer as equal to, or greater than or equal to?
by Hector Acosta Discussion 1H
Fri Oct 27, 2017 10:19 am
Forum: Ionic & Covalent Bonds
Topic: Cations and Anions [ENDORSED]
Replies: 12
Views: 931

Re: Cations and Anions [ENDORSED]

Also cations are usually metals and anions are usually nonmetals
by Hector Acosta Discussion 1H
Fri Oct 20, 2017 10:44 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s-, p-, d-, f- Orbitals [ENDORSED]
Replies: 3
Views: 245

Re: s-, p-, d-, f- Orbitals [ENDORSED]

Lavelle said electrons will always be paired in the elements we go over. You know how many electrons are in each orbital depending on the element, but the s orbital can hold up to 2 the p orbital up to 6 the d orbital up to 10 and the f orbital up to 14.
by Hector Acosta Discussion 1H
Fri Oct 20, 2017 10:39 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Angular Quantum Numbers
Replies: 1
Views: 134

Re: Angular Quantum Numbers

Not that I know of you must know what orbital it lies in. S=0, P=1,D=2,and F=3.
by Hector Acosta Discussion 1H
Fri Oct 13, 2017 3:09 pm
Forum: Properties of Light
Topic: Chapter 1 problem 7a
Replies: 1
Views: 225

Chapter 1 problem 7a

I am pretty sure I did all the steps right for the problem but I got 253 nm and the solution manual says it is 250 nm? Help please.
by Hector Acosta Discussion 1H
Fri Oct 13, 2017 3:06 pm
Forum: Properties of Electrons
Topic: 1/2mv^2
Replies: 2
Views: 191

1/2mv^2

I have been confused with this equation what exactly does this represent can someone explain this to me please?
by Hector Acosta Discussion 1H
Tue Oct 03, 2017 3:34 pm
Forum: SI Units, Unit Conversions
Topic: Molecules [ENDORSED]
Replies: 10
Views: 531

Molecules [ENDORSED]

What is the difference between molecules and moles?
by Hector Acosta Discussion 1H
Tue Oct 03, 2017 3:33 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant- Excess
Replies: 4
Views: 249

Re: Limiting Reactant- Excess

Which ever reactant is in excess it means that reactant has more product. This would mean that the other reactant is your limiting reactant.

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