Search found 60 matches
- Sat Mar 16, 2019 10:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: q=mCdeltaT
- Replies: 15
- Views: 8193
Re: q=mCdeltaT
I assume if they give you grams you use m, if moles then youd use n.
- Sat Mar 16, 2019 10:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity of Water
- Replies: 6
- Views: 897
Re: Heat Capacity of Water
the unit change is all the same no matter whether in Celsius or Kelvin in this case
- Sat Mar 16, 2019 10:30 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Bomb calorimeter
- Replies: 6
- Views: 897
Re: Bomb calorimeter
regular calorimeter=reaction takes place in the water, bomb calorimeter=reaction takes place in a sealed metal container.
- Sat Mar 16, 2019 10:21 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Stability of reactants and products
- Replies: 2
- Views: 953
Re: Stability of reactants and products
you can determine it by the equilibrium constant k
- Sat Mar 16, 2019 10:21 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: using molarity vs moles
- Replies: 2
- Views: 492
Re: using molarity vs moles
excercises from where exactly?
- Sat Mar 16, 2019 10:19 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Midterm Questions
- Replies: 2
- Views: 521
Re: Midterm Questions
^ it implies it is at equilibrium so yes you are able to use the ICE table
- Sat Mar 16, 2019 9:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Partial Pressure
- Replies: 4
- Views: 631
Re: Partial Pressure
^ yes solids should not be included
- Sat Mar 16, 2019 9:24 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Shifting K with changes in volume
- Replies: 4
- Views: 650
Re: Shifting K with changes in volume
Yes it will shift to the sides with more moles due to more volume and less pressure
- Sat Mar 16, 2019 9:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Test #1
- Replies: 3
- Views: 632
Re: Test #1
^yes those are the ones !
- Sat Mar 16, 2019 9:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Direction reaction goes
- Replies: 2
- Views: 523
Re: Direction reaction goes
Kc, you must convert moles of the reactants to pressure values using PV=nRT the ideal gas law
- Sat Mar 16, 2019 9:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Ka Kb = Kw
- Replies: 5
- Views: 884
Re: Ka Kb = Kw
you can use it to find the pH or the pOh
- Sat Mar 16, 2019 9:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equilibrium constant
- Replies: 5
- Views: 479
Re: Equilibrium constant
catalyst ahs no effect on equilibrium
- Sat Mar 16, 2019 8:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Conjugate Base and Acid
- Replies: 4
- Views: 588
Re: Conjugate Base and Acid
^A conjugate acid is a base with a hydrogen ion added to it, a conjugate base is what is left over after an acid has donated a proton
- Sat Mar 16, 2019 8:42 pm
- Forum: Phase Changes & Related Calculations
- Topic: removing heat from system
- Replies: 4
- Views: 681
Re: removing heat from system
^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic
- Sat Mar 16, 2019 8:42 pm
- Forum: Phase Changes & Related Calculations
- Topic: removing heat from system
- Replies: 4
- Views: 681
Re: removing heat from system
^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic
- Sat Mar 16, 2019 8:35 pm
- Forum: Phase Changes & Related Calculations
- Topic: Isothermal
- Replies: 9
- Views: 1145
Re: Isothermal
it usually will let you know , however you can also assume if it is at a constant T
- Sat Mar 16, 2019 8:32 pm
- Forum: Calculating Work of Expansion
- Topic: -DeltanRT
- Replies: 2
- Views: 550
Re: -DeltanRT
yes you can use it, but it is mostly used for specific chemical rxns
- Sat Mar 16, 2019 8:31 pm
- Forum: Calculating Work of Expansion
- Topic: Units for R
- Replies: 10
- Views: 1395
Re: Units for R
depending which R you used is also dependent on the units you have, at the end most should be able to cancel all out
- Sat Mar 16, 2019 8:30 pm
- Forum: Calculating Work of Expansion
- Topic: Work without change in volume
- Replies: 8
- Views: 1129
Re: Work without change in volume
since there is no delta v , your delta v would be 0 so your overall work would also be 0
- Sat Mar 16, 2019 8:30 pm
- Forum: Calculating Work of Expansion
- Topic: irreversible and reversible
- Replies: 5
- Views: 792
Re: irreversible and reversible
^ yes reversible reactions are generaly theorectical, majority will always be irreversible
- Sat Mar 16, 2019 8:28 pm
- Forum: Calculating Work of Expansion
- Topic: Equations for work
- Replies: 7
- Views: 910
Re: Equations for work
the first two are definitely the same equation
- Sat Mar 16, 2019 8:27 pm
- Forum: Calculating Work of Expansion
- Topic: Work
- Replies: 1
- Views: 440
Work
do we use w= -nRT only when a specific reaction occurs?
- Sat Mar 16, 2019 12:36 pm
- Forum: General Rate Laws
- Topic: Instantaneous Rate
- Replies: 1
- Views: 379
Instantaneous Rate
does the instantaneous rate changes as the reaction proceeds for most reactions?
- Sat Mar 16, 2019 12:30 pm
- Forum: General Rate Laws
- Topic: Unique Average Rate
- Replies: 1
- Views: 389
Unique Average Rate
the unique average rate is the average rate divided by the stoichiometric coefficient of the species monitored?
- Sat Mar 16, 2019 12:29 pm
- Forum: General Rate Laws
- Topic: Average Rate of Reaction
- Replies: 2
- Views: 469
Average Rate of Reaction
The average rate of a reaction is the change in concentration of a species divided by the time over which the change takes place?
- Fri Mar 15, 2019 11:14 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Standard Cell Potential
- Replies: 1
- Views: 229
Standard Cell Potential
Is the standard cell potential always cathode - anode?
- Fri Mar 15, 2019 11:01 pm
- Forum: Zero Order Reactions
- Topic: Zero-order reactions
- Replies: 4
- Views: 684
Re: Zero-order reactions
I believe the units for a zero order reaction is M/s
- Fri Mar 15, 2019 9:46 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy
- Replies: 2
- Views: 462
Gibbs Free Energy
When delta G is equal to 0 it means it is at equilibrium?
- Fri Mar 15, 2019 9:44 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy
- Replies: 1
- Views: 430
Gibbs Free Energy
when it is negative, it means it is sponatenous right?
- Fri Mar 15, 2019 9:43 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isometric/Isochoric
- Replies: 11
- Views: 1402
Isometric/Isochoric
Is a bomb calorimeter an example of isometric/osochoric?
- Sun Dec 09, 2018 7:55 pm
- Forum: Naming
- Topic: Oxidation Number
- Replies: 4
- Views: 680
Re: Oxidation Number
^yes, exactly you would need to see the overall charge of the coordination compound first then add the overall charges within the ligands in order to find the oxidation state of the metal. However, keep in consideration the cations or anions if there are any outside the coordination compound.
- Sun Dec 09, 2018 7:51 pm
- Forum: Naming
- Topic: Ligand Names
- Replies: 4
- Views: 643
Re: Ligand Names
i believe both are acceptable since it was barely changed
- Sun Dec 09, 2018 7:50 pm
- Forum: Naming
- Topic: bis-, tris-, etc.
- Replies: 4
- Views: 572
Re: bis-, tris-, etc.
oxalate would have to use these prefixes due to it being bidentate
- Sun Dec 09, 2018 7:48 pm
- Forum: Naming
- Topic: -ate in naming
- Replies: 7
- Views: 1685
Re: -ate in naming
you only add when the complex ion is an anion
- Sun Dec 09, 2018 7:47 pm
- Forum: Sigma & Pi Bonds
- Topic: Rotation
- Replies: 5
- Views: 1046
Re: Rotation
However, the pi form between the p-orbitals of two atoms and secure the top and bottom of an atom in place so there can be no rotation occurring
- Sun Dec 09, 2018 7:46 pm
- Forum: Sigma & Pi Bonds
- Topic: Rotation
- Replies: 5
- Views: 1046
Re: Rotation
Sigma bonds bond end to end, allowing the rotation to occur
- Sun Dec 09, 2018 7:44 pm
- Forum: Sigma & Pi Bonds
- Topic: Test 3 Q3D
- Replies: 4
- Views: 691
Re: Test 3 Q3D
the two pi bonds should be drawn next to each other because they prevent rotation
- Sun Dec 09, 2018 7:43 pm
- Forum: Sigma & Pi Bonds
- Topic: Why are sigma bonds stronger than pi bonds?
- Replies: 10
- Views: 4700
Re: Why are sigma bonds stronger than pi bonds?
The sigma bonds have a greater overlap
- Sun Dec 09, 2018 7:41 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling Point
- Replies: 6
- Views: 2615
Re: Boiling Point
^H2Se does have dipole dipole forces
- Sun Dec 09, 2018 7:39 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling Point
- Replies: 6
- Views: 2615
Re: Boiling Point
H2Se has the higher boiling point due to having a larger mass and more electrons
- Sun Dec 09, 2018 7:38 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Strength
- Replies: 5
- Views: 924
Re: Strength
yes, an ion-ion is greater
- Sun Dec 09, 2018 7:37 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Forces
- Replies: 1
- Views: 415
Forces
Which forces are responsible for condensed phase(liquid& solid)?
- Sun Dec 09, 2018 7:34 pm
- Forum: Lewis Acids & Bases
- Topic: Na+
- Replies: 3
- Views: 864
Na+
Why does Na+ not affect pH?
- Sun Dec 09, 2018 7:34 pm
- Forum: Lewis Acids & Bases
- Topic: Ions as Bases
- Replies: 1
- Views: 372
Ions as Bases
So a salt containing a base will raise solution pH?
- Sun Dec 09, 2018 7:32 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: H-atom
- Replies: 1
- Views: 1827
H-atom
So if light is emitted, it means delta E will be negative right ?
- Sun Dec 09, 2018 7:27 pm
- Forum: Lewis Acids & Bases
- Topic: Stronger Acid
- Replies: 1
- Views: 420
Stronger Acid
Why is HCl a stronger acid than HF?
- Sun Nov 04, 2018 6:49 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Spin Magnetic Quantum Number
- Replies: 6
- Views: 940
Re: Spin Magnetic Quantum Number
well we know our ms will always be -1/2 or +1/2 because each orbital can only hold 2 electrons, however i don't think there's a way to identify whether its the - or + value
- Sun Nov 04, 2018 6:47 pm
- Forum: Octet Exceptions
- Topic: What are the octet exceptions?
- Replies: 9
- Views: 1128
Re: What are the octet exceptions?
^I believe it is because they don't obtain 8 electrons, so they don't need to have a full octet
- Sun Nov 04, 2018 6:37 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 4
- Views: 434
Re: Atomic Radius
so it is based off the attraction of the protons and electrons?
- Sun Nov 04, 2018 6:01 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 8
- Views: 758
Re: Formal Charge
thank you !
- Thu Nov 01, 2018 6:48 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 8
- Views: 758
Formal Charge
How do you determine your V, L , and S?
- Thu Nov 01, 2018 6:39 pm
- Forum: Resonance Structures
- Topic: 7th Edition 2C5.C
- Replies: 2
- Views: 414
Re: 7th Edition 2C5.C
^yeah I believe changing around the area of double bond won't result in losing the electron.
- Thu Nov 01, 2018 6:31 pm
- Forum: Resonance Structures
- Topic: Reasonance Structures
- Replies: 1
- Views: 176
Reasonance Structures
Why are the e- in resonance structures delocalized?
- Sun Oct 21, 2018 5:42 pm
- Forum: DeBroglie Equation
- Topic: HW Problem 1.39 (6th Edition)
- Replies: 4
- Views: 539
HW Problem 1.39 (6th Edition)
Does anyone know how to solve this problem?
- Sun Oct 21, 2018 5:29 pm
- Forum: Einstein Equation
- Topic: The symbol v?
- Replies: 16
- Views: 8834
Re: The symbol v?
Yeah exactly, frequency is usually italicized with a curve to it where as velocity is just a regular lower case v. It might be confusing at first to depict it from the equations, but they do have different appearances.
- Sun Oct 21, 2018 5:27 pm
- Forum: Einstein Equation
- Topic: HW Problem 1.25 (6th Edition)
- Replies: 2
- Views: 360
HW Problem 1.25 (6th Edition)
Does anyone know how to go on solving part b and c for this problem?
- Tue Oct 16, 2018 5:50 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Configuration of Cations
- Replies: 8
- Views: 891
Electron Configuration of Cations
Example: Write the electron configurations of a. copper (|) ion b. copper (||) ion
When finding the electron configuration how do you know how many electrons to remove?
When finding the electron configuration how do you know how many electrons to remove?
- Thu Oct 04, 2018 9:43 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Problem G15 (7TH EDITION) Part B
- Replies: 3
- Views: 178
Re: Problem G15 (7TH EDITION) Part B
So, since the concentration basically needs 1/5 of the starting NaOH solution , does it mean I would need to add four volumes of water to one volume of the 2.5 mol*L^-1 solution? I divided the 60 by 5 and got 12.0 mL. So I got that 12.0 mL of 2.5 mol*L^-1 of the solution is added to the 48.0 mL of w...
- Thu Oct 04, 2018 9:10 pm
- Forum: Balancing Chemical Reactions
- Topic: Problem H1 (7th EDITION) Part A
- Replies: 4
- Views: 347
Problem H1 (7th EDITION) Part A
The question states: It appears that balancing the chemical equation Cu+SO2 -> CuO + S would be simple if we could just add another O atom to the product side. Why is that procedure not allowed? I stated you can't add the O atom because it is not produced by the defined reaction but I am unsure if t...
- Thu Oct 04, 2018 12:45 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Problem G15 (7TH EDITION) Part B
- Replies: 3
- Views: 178
Problem G15 (7TH EDITION) Part B
How would I go upon answering the question?
Question: An experiment requires the use of 60.0 mL of 0.50 M NaOH(aq). The stock room assistant can only find a reagant bottle of 2.5 M NaOH(aq). How can the 0.50 M NaOH(aq) be prepared?
Question: An experiment requires the use of 60.0 mL of 0.50 M NaOH(aq). The stock room assistant can only find a reagant bottle of 2.5 M NaOH(aq). How can the 0.50 M NaOH(aq) be prepared?