Search found 52 matches
- Sun Dec 08, 2019 1:12 am
- Forum: Air Pollution & Acid Rain
- Topic: Acid Rain
- Replies: 6
- Views: 732
Re: Acid Rain
To what extent will this possibly be on the final?
- Sun Dec 08, 2019 1:03 am
- Forum: Calculating the pH of Salt Solutions
- Topic: pH vs. pOH
- Replies: 17
- Views: 2561
Re: pH vs. pOH
To add on, pH + pOH = 14
- Sun Dec 08, 2019 1:01 am
- Forum: Identifying Acidic & Basic Salts
- Topic: weak bases produce acidic solutions?
- Replies: 3
- Views: 334
Re: weak bases produce acidic solutions?
So a strong acid and weak base will produce an acidic solution while a weak acid and strong base will produce a basic solution?
- Sun Dec 08, 2019 12:57 am
- Forum: Polyprotic Acids & Bases
- Topic: How can you tell if an acid/base is polyprotic?
- Replies: 6
- Views: 1042
Re: How can you tell if an acid/base is polyprotic?
I remember hearing about the term amphiprotic. What is the difference between amphiprotic and polyprotic?
- Sun Dec 08, 2019 12:53 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Weak Acids
- Replies: 4
- Views: 250
Re: Weak Acids
So if an equation has the double arrows, then it is a weak acid, but if the arrow is only one way, then it is a strong acid?
- Sun Dec 01, 2019 9:25 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: calculating pH
- Replies: 4
- Views: 633
Re: calculating pH
We will only have to calculate the pH for strong acids and bases.
- Sun Dec 01, 2019 9:19 pm
- Forum: Lewis Acids & Bases
- Topic: Donating Proton vs Accepting Electron
- Replies: 4
- Views: 299
Re: Donating Proton vs Accepting Electron
Being a proton donor and an electron acceptor are the same thing because once the acid donates or loses a proton, it can then accept an electron pair.
- Sun Dec 01, 2019 9:08 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Ionization in Water
- Replies: 8
- Views: 1068
Re: Ionization in Water
ryanhon2H wrote:Strong bases fully dissociate in water, while weak bases only partially dissociate, as the strength of the base depends on its ability to fully dissociate.
Is this why the balanced equation for strong acids have a one-way arrow while weak acids have a two-way arrow?
- Sun Dec 01, 2019 8:54 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: The pH Scale
- Replies: 7
- Views: 515
Re: The pH Scale
Sadhana_Dicussion_4A wrote:I think all we need to know is pH<7 is considered to be an acid, pH>7 is considered to be a base, and pH=7 is considered neutral. Also, I think we should know how to find the pH of a solution given the concentration, and vice versa.
How do we find the pH of a solution given the concentration?
- Sun Dec 01, 2019 8:52 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Inorganic or Organic
- Replies: 6
- Views: 472
Re: Inorganic or Organic
Organic acids have carbon while inorganic acids do not have carbon.
- Sun Nov 24, 2019 11:17 pm
- Forum: Biological Examples
- Topic: Cisplatin [ENDORSED]
- Replies: 19
- Views: 1366
Re: Cisplatin [ENDORSED]
Cisplatin stops the growth of cancer cells, but not exclusively, so it would also stop the growth of healthy cells.
- Sun Nov 24, 2019 11:14 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 4
- Views: 262
Re: Ligands
How do we know which is the acid or base?
- Sun Nov 24, 2019 11:11 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelate
- Replies: 4
- Views: 329
Re: Chelate
A chelate complex is when there are two or more separate coordinate bonds between a polydentate ligand and a single central atom.
- Sun Nov 24, 2019 11:02 pm
- Forum: Naming
- Topic: Di-, Tri-, Tetra- vs Bis-, Tris-, Tetrakis-
- Replies: 11
- Views: 1007
Re: Di-, Tri-, Tetra- vs Bis-, Tris-, Tetrakis-
kpang_4H wrote:Bilal Pandit 3F wrote:They are used when the ligand has a prefix itself, so the ligand would have a di, tri, etc, so instead of saying didi, you would just say dis.
How do you know which is the ligand?
I believe that the ligands are the atoms that surround the transition metal.
- Sun Nov 24, 2019 10:59 pm
- Forum: Naming
- Topic: Roman Numerals
- Replies: 3
- Views: 331
Re: Roman Numerals
The roman numeral comes from the oxidation state of the transition metal.
- Sun Nov 17, 2019 2:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 6
- Views: 404
Re: VSEPR
chari_maya 3B wrote:Why are different strength bonds treated the same when applying VSEPR?
I think it has to do with the idea that the electrons account for one region of electron density, as in the bond strength does not matter as much as how many actual regions of electron density a molecule has.
- Sun Nov 17, 2019 2:48 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Angles to know for test 2
- Replies: 3
- Views: 225
Re: Angles to know for test 2
Do we need to know the angle degrees for all of the shapes as well?
- Sun Nov 17, 2019 2:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: regions of electron density
- Replies: 10
- Views: 548
Re: regions of electron density
Regions of electron density include bonding pairs as well as lone pairs.
- Sun Nov 17, 2019 2:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Structure of H2O
- Replies: 3
- Views: 226
Re: Structure of H2O
So if there are only two areas of electron density, that is when they are opposite of each other due to the strong repulsion?
- Sun Nov 17, 2019 2:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR notation
- Replies: 8
- Views: 563
Re: VSEPR notation
NO3- would have the notation AX3 because the central atom has 3 atoms bonded to it. If there are any lone pair e-, then the E part of the notation would have to be used.
- Sun Nov 17, 2019 2:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Trigonal Pyramidal?
- Replies: 4
- Views: 339
Re: Trigonal Pyramidal?
In this compound, is it trigonal pyramidal because even though there are 4 regions of e- density, one of the regions is a lone pair?
- Thu Nov 07, 2019 10:18 pm
- Forum: Lewis Structures
- Topic: Radicals
- Replies: 5
- Views: 278
Re: Radicals
Are there atoms that commonly are radicals? Or can any atom be a radical?
- Thu Nov 07, 2019 10:15 pm
- Forum: Dipole Moments
- Topic: Clarification on Dipole Moment
- Replies: 3
- Views: 250
Re: Clarification on Dipole Moment
How do you draw a dipole moment?
- Thu Nov 07, 2019 10:11 pm
- Forum: Electronegativity
- Topic: ionic character
- Replies: 9
- Views: 656
Re: ionic character
So if the difference in electronegativity is greater than 2, then the bond is ionic?
- Thu Nov 07, 2019 10:03 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge Equation?
- Replies: 12
- Views: 575
Re: Formal Charge Equation?
Victoria Otuya 4F wrote:I learned an easier way to remember the formal charge equation: valence electron -(dots + line).
That is a really good way to remember it!
- Thu Nov 07, 2019 9:55 pm
- Forum: Bond Lengths & Energies
- Topic: Why Are Double Bonds Shorter
- Replies: 16
- Views: 6226
Re: Why Are Double Bonds Shorter
So triple bonds pull the nuclei even closer then? Which then makes them even stronger than double bonds?
- Sun Nov 03, 2019 11:09 pm
- Forum: Resonance Structures
- Topic: Showing resonance
- Replies: 8
- Views: 396
Re: Showing resonance
What about the example where we just drew a pentagon with a circle in the middle? Could that work?
- Sun Nov 03, 2019 11:07 pm
- Forum: Octet Exceptions
- Topic: Expanded Valence Shells
- Replies: 4
- Views: 176
Re: Expanded Valence Shells
Is this why some elements end up breaking the octet rule?
- Sun Nov 03, 2019 11:05 pm
- Forum: Octet Exceptions
- Topic: Octet Exceptions
- Replies: 7
- Views: 444
Re: Octet Exceptions
Midori Hupfeld 3D wrote:And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).
Does this mean that radicals are more reactive then?
- Sun Nov 03, 2019 11:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence electrons of transition metals
- Replies: 2
- Views: 218
Re: Valence electrons of transition metals
I remember seeing that the valence electron count for some elements repeat or skip a count, which ones would that be?
- Sun Nov 03, 2019 11:00 pm
- Forum: Ionic & Covalent Bonds
- Topic: covalent character
- Replies: 4
- Views: 160
Re: covalent character
What is the difference between ionic and covalent bonds?
- Sun Oct 27, 2019 11:51 pm
- Forum: Resonance Structures
- Topic: Formal Charge
- Replies: 5
- Views: 264
Re: Formal Charge
No, I do not think so
- Sun Oct 27, 2019 11:48 pm
- Forum: Resonance Structures
- Topic: Resonance Structure meaning
- Replies: 6
- Views: 380
Re: Resonance Structure meaning
So is the resonance structure the average of all the possible lewis structures for a certain bond?
- Sun Oct 27, 2019 11:45 pm
- Forum: Lewis Structures
- Topic: 2 Odd Configurations
- Replies: 4
- Views: 162
Re: 2 Odd Configurations
What are the odd configurations that we should know?
- Sun Oct 27, 2019 11:44 pm
- Forum: Lewis Structures
- Topic: Choosing the central atom
- Replies: 16
- Views: 805
Re: Choosing the central atom
Just to clarify, what are the periodic trends for ionization energy?
- Sun Oct 27, 2019 11:39 pm
- Forum: Ionic & Covalent Bonds
- Topic: Confusion with covalent
- Replies: 3
- Views: 153
Re: Confusion with covalent
I believe it is because a noble-gas configuration of electrons is the most stable for an atom to have.
- Sun Oct 20, 2019 4:25 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Purpose of the Equation
- Replies: 9
- Views: 403
Re: Purpose of the Equation
So as the uncertainty of one variable goes up, the other goes down?
- Sun Oct 20, 2019 4:23 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: What does the H mean?
- Replies: 9
- Views: 894
Re: What does the H mean?
The H refers to Planck's Constant, which is equal to 6.626 x 10^-34 Js.
- Sun Oct 20, 2019 4:17 pm
- Forum: Photoelectric Effect
- Topic: One photon one atom interaction
- Replies: 14
- Views: 616
Re: One photon one atom interaction
So in order for the electron to be ejected, the frequency of the light has to be enough? The intensity does not matter if the frequency is not high enough right?
- Sun Oct 20, 2019 3:53 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Spin up and spin down
- Replies: 13
- Views: 1210
Re: Spin up and spin down
How do we figure out if the electron spins up or spins down?
- Sun Oct 20, 2019 3:46 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal Plane
- Replies: 3
- Views: 157
Re: Nodal Plane
Does the Nodal Plane represent the graph of the orbital functions?
- Sun Oct 13, 2019 10:19 pm
- Forum: DeBroglie Equation
- Topic: DeBroglie Equation
- Replies: 9
- Views: 404
Re: DeBroglie Equation
So, De Broglie's equation can only be applied to things that have a mass and velocity (p)?
- Sun Oct 13, 2019 10:17 pm
- Forum: DeBroglie Equation
- Topic: wavelike vs particle-like
- Replies: 2
- Views: 135
Re: wavelike vs particle-like
Having wavelike properties means that the particle behaves like a wave. I am not sure what particle-like properties refer to though.
- Sun Oct 13, 2019 10:13 pm
- Forum: DeBroglie Equation
- Topic: Concept of a wave
- Replies: 7
- Views: 544
Re: Concept of a wave
So, if a particle has wavelike properties, then the particle itself is somewhat moving in a wave pattern?
- Sun Oct 13, 2019 10:01 pm
- Forum: Properties of Light
- Topic: When to use the Planck's Constant?
- Replies: 6
- Views: 353
Re: When to use the Planck's Constant?
i believe that Planck's Constant (h) is also used in De Broglie's Wave Equation
- Sun Oct 13, 2019 9:58 pm
- Forum: Properties of Light
- Topic: Photons
- Replies: 4
- Views: 264
Re: Photons
When talking about photons, they are quantized right? And that means that they are counted as whole numbers rather than values like 2.5 or 3.67 etc.?
- Sun Oct 06, 2019 11:03 pm
- Forum: General Science Questions
- Topic: temperature
- Replies: 4
- Views: 1308
Re: temperature
Will questions regarding temperature be on the first test?
- Sun Oct 06, 2019 11:02 pm
- Forum: General Science Questions
- Topic: Order of Elements When Writing Out a Compound
- Replies: 8
- Views: 563
Re: Order of Elements When Writing Out a Compound
I was also a little confused with this topic too, but I was informed that the question itself can present the elements in the correct order already (at least for this first test)
- Sun Oct 06, 2019 10:57 pm
- Forum: General Science Questions
- Topic: Periodic Table
- Replies: 5
- Views: 332
Re: Periodic Table
Will we receive a periodic table to use during the tests?
- Sun Oct 06, 2019 10:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: First Test in Discussion
- Replies: 13
- Views: 807
Re: First Test in Discussion
Thank you all for the information on what to study for the first test!
- Sun Oct 06, 2019 10:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 2 Homework Problems [ENDORSED]
- Replies: 67
- Views: 8491
Re: Week 2 Homework Problems [ENDORSED]
Just to make sure, the homework problems are now due during our actual discussions right?
- Sun Oct 06, 2019 10:43 pm
- Forum: Limiting Reactant Calculations
- Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
- Replies: 68
- Views: 7434
Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
My TA also said that an incorrect answer could still receive some partial credit with the correct work/steps, so I think it is a good idea to show work.