Search found 51 matches
- Sat Dec 07, 2019 4:59 pm
- Forum: Lewis Acids & Bases
- Topic: homework question 6A.17
- Replies: 1
- Views: 171
Re: homework question 6A.17
I know that As is an ion that makes a molecule amphoteric, I don't know about Bi though
- Sat Dec 07, 2019 1:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
- Replies: 115
- Views: 13210
Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
when will original marshmallow practice's answers be posted
- Wed Dec 04, 2019 2:54 pm
- Forum: Bronsted Acids & Bases
- Topic: HOI vs HOCl
- Replies: 3
- Views: 393
Re: HOI vs HOCl
HOCl and HOI are both oxoacids and act quite differently, because of the oxygen involved in their structure. Since the electrons are withdrawn (or pulled due to the high electronegativity of oxygen and chlorine), they are delocalized and are more prone to get rid of the H+ proton than HOI. But when...
- Wed Dec 04, 2019 2:51 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: CO3^2- Resonance and Polydentate
- Replies: 2
- Views: 220
Re: CO3^2- Resonance and Polydentate
The terms monodentate/bidentate don't apply to a molecule like this, they only apply to coordination compounds (transition metal bonded to atom)
- Wed Dec 04, 2019 2:45 pm
- Forum: Naming
- Topic: Naming Acids/ Bases
- Replies: 4
- Views: 414
Re: Naming Acids/ Bases
Dont think so
- Wed Dec 04, 2019 2:45 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric vs Amphiprotic
- Replies: 9
- Views: 587
Re: Amphoteric vs Amphiprotic
So are amphoteric and amphiprotic the same thing?
- Wed Dec 04, 2019 2:43 pm
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 6
- Views: 458
Re: Cisplatin
Do we have to know that for the test?
- Fri Nov 29, 2019 8:14 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pOH scale
- Replies: 2
- Views: 228
Re: pOH scale
Pretty sure its just traditional
- Fri Nov 29, 2019 8:12 pm
- Forum: Naming
- Topic: Coordination Compounds on the Final
- Replies: 4
- Views: 321
Re: Coordination Compounds on the Final
What kinds of problems would these consist of? Just naming?
- Fri Nov 29, 2019 8:11 pm
- Forum: Lewis Acids & Bases
- Topic: 6A.13
- Replies: 7
- Views: 371
Re: 6A.13
Since it has a positive charge, it is a cation and therefore lost electrons. Hence it will want to gain electrons/accept them
- Fri Nov 29, 2019 8:09 pm
- Forum: Lewis Acids & Bases
- Topic: Strong Acids
- Replies: 8
- Views: 612
Re: Strong Acids
What are the ones that we're supposed to know?
- Fri Nov 29, 2019 8:04 pm
- Forum: Naming
- Topic: charge of trnasition metal
- Replies: 4
- Views: 299
Re: charge of trnasition metal
it will always be given or you have to infer it based on the other charge within the molecule
- Thu Nov 21, 2019 10:46 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: When to Use Formal Charge
- Replies: 4
- Views: 452
Re: When to Use Formal Charge
always use formal charge, and then try to create a structure that ends up with lowest formal charge/FC that matches the molecule. also try to arrange the molecule so that all the FC on each element is closest to 0
- Thu Nov 21, 2019 10:44 pm
- Forum: Dipole Moments
- Topic: boiling point example
- Replies: 3
- Views: 338
Re: boiling point example
Cl is more electronegative than I so KCL has higher boiling point.
- Thu Nov 21, 2019 10:36 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: 3F 15
- Replies: 5
- Views: 954
Re: 3F 15
AsF5 is non-polar while AsF3 is so it has more attractive dipole dipole forces, therefore requiring more energy to overcome IMFs
- Tue Nov 19, 2019 3:32 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Linear Shape
- Replies: 6
- Views: 371
Re: Linear Shape
the molecule will maintain its linear shape even when its polar because the dipole moments may not be that large/attractive enough to change the shape in any way
- Tue Nov 19, 2019 3:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bent v. angular
- Replies: 27
- Views: 1525
Re: bent v. angular
bent and angular are just synonyms for each other
- Sun Nov 17, 2019 2:12 pm
- Forum: Trends in The Periodic Table
- Topic: Question
- Replies: 17
- Views: 1414
Re: Question
think of ionization energy as the energy needed to make an ion (to remove an electron)
think of electronegativity as an atom's attraction to gain electrons
think of electronegativity as an atom's attraction to gain electrons
- Sun Nov 17, 2019 2:05 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: Dipole Moments
- Replies: 3
- Views: 244
Re: Dipole Moments
When dipole moments are equal and opposite directions
- Sun Nov 17, 2019 2:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: vapor pressure
- Replies: 4
- Views: 339
Re: vapor pressure
we haven't explicitly covered it so no
- Sun Nov 17, 2019 2:03 pm
- Forum: Hybridization
- Topic: sp^3 orbital
- Replies: 3
- Views: 278
Re: sp^3 orbital
sp3 means that the s orbital is filled but the p orbital is only half filled (3 electrons hence the 3 out of 6)
- Sun Nov 17, 2019 2:01 pm
- Forum: Hybridization
- Topic: Test?
- Replies: 6
- Views: 393
Re: Test?
We still have Monday lecture too so it might be in that lecture and therefore on the test
- Thu Nov 07, 2019 11:42 am
- Forum: Photoelectric Effect
- Topic: Midterm 1
- Replies: 9
- Views: 699
Re: Midterm 1
Anyone know when we'll get the midterm grades back?
- Tue Nov 05, 2019 8:52 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Lyman
- Replies: 1
- Views: 177
Re: Lyman
the final is n = 1 and this is for UV light
- Tue Nov 05, 2019 8:50 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect vs. De Broglie
- Replies: 8
- Views: 777
Re: Photoelectric Effect vs. De Broglie
speed of light can only be used for light/photons while de bregolie can be used with other types of particles
- Sun Nov 03, 2019 9:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent
- Replies: 14
- Views: 895
Re: Ionic vs Covalent
EN greater than 2.5 = ionic
EN less than 1.5 = covalent
in the middle is a blend of both
EN less than 1.5 = covalent
in the middle is a blend of both
- Sun Nov 03, 2019 9:14 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Rules for n, l,m
- Replies: 11
- Views: 618
Re: Rules for n, l,m
n = shell
l = subshell
ml = orientation of orbitals
ms = electron spin
l = subshell
ml = orientation of orbitals
ms = electron spin
- Sun Nov 03, 2019 9:12 pm
- Forum: Electronegativity
- Topic: Trends of the Periodic Table
- Replies: 3
- Views: 230
Re: Trends of the Periodic Table
atomic radius, ionic radius (increase down group, decrease across period)
electron affinity, electronegativity, ionization energy (decrease down group, increase across period)
electron affinity, electronegativity, ionization energy (decrease down group, increase across period)
- Sun Nov 03, 2019 9:06 pm
- Forum: Properties of Light
- Topic: What are the units of hertz
- Replies: 41
- Views: 2137
Re: What are the units of hertz
1 cycle/second
- Sun Nov 03, 2019 9:06 pm
- Forum: Octet Exceptions
- Topic: Octet Rule exceptions
- Replies: 14
- Views: 871
Re: Octet Rule exceptions
Elements beyond the 3rd period can potentially break the octet rule
- Mon Oct 28, 2019 10:35 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Question about the Principles on Tests
- Replies: 5
- Views: 309
Re: Question about the Principles on Tests
just know to be safe
- Mon Oct 28, 2019 10:34 am
- Forum: Octet Exceptions
- Topic: aufbau principle
- Replies: 8
- Views: 356
Re: aufbau principle
The electrons are in a lower energy level (3) as opposed to the higher energy level of 4.
- Mon Oct 28, 2019 10:29 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Transition Metals
- Replies: 2
- Views: 226
Re: Transition Metals
You really don't have to know that bit of information for that class, a question will always tell you what type of cation/anion it is
- Mon Oct 28, 2019 10:28 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration Special Cases
- Replies: 6
- Views: 496
Re: Electron Configuration Special Cases
just know those two
- Mon Oct 28, 2019 10:27 am
- Forum: Lewis Structures
- Topic: Lewis Structure of Ions
- Replies: 6
- Views: 389
Re: Lewis Structure of Ions
Yes you put the bracket
- Sun Oct 20, 2019 8:01 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: s-, p-, d- ,f- orbitals
- Replies: 10
- Views: 491
Re: s-, p-, d- ,f- orbitals
x y z shows the axis on the orbitals
- Sun Oct 20, 2019 8:00 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Atomic orbitals
- Replies: 5
- Views: 200
Re: Atomic orbitals
the probability that this area is dense with electrons
- Sun Oct 20, 2019 7:58 pm
- Forum: Properties of Light
- Topic: What are the units of hertz
- Replies: 41
- Views: 2137
Re: What are the units of hertz
1/s. For example, 13 Hz = 13/second would be 13 cycles per second
- Sun Oct 20, 2019 7:57 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbitals
- Replies: 8
- Views: 316
Re: Orbitals
Can someone explain to me the specialty case of Chromium? With it having 4s1 instead of 4s2? For chromium, there are 4 levels (1,2,3,4). For chromium, the configuration at first glance would be 1s2,2s2,2p6,3s2,3p6,4s2,3d4. As you can see, the 3rd energy level seems to be filled after the 4th. Howev...
- Sun Oct 20, 2019 7:51 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Spin up and spin down
- Replies: 13
- Views: 1165
Re: Spin up and spin down
Just assume the electrons are oriented differently
- Sun Oct 13, 2019 7:12 pm
- Forum: Einstein Equation
- Topic: E=hv
- Replies: 8
- Views: 263
Re: E=hv
plancks constant
- Sun Oct 13, 2019 7:05 pm
- Forum: Properties of Light
- Topic: Amplitude
- Replies: 6
- Views: 415
Re: Amplitude
Amplitude is indépendant of wavelength and frequency
- Sun Oct 13, 2019 7:03 pm
- Forum: Significant Figures
- Topic: Significant Figures on Test 1
- Replies: 3
- Views: 295
Re: Significant Figures on Test 1
Im pretty sure Dr. Lavelle or my TA (don't remember) said we won't be using sig fig rules
- Sun Oct 13, 2019 7:01 pm
- Forum: Properties of Light
- Topic: Visualizing wave-particle duality
- Replies: 3
- Views: 170
Re: Visualizing wave-particle duality
^^ "The wavelength of light is different from the wavelength of a photon/electron."
A wavelength of light is different from the wavelength of an electron, but not a photon. A photon is essentially light
A wavelength of light is different from the wavelength of an electron, but not a photon. A photon is essentially light
- Thu Oct 10, 2019 11:47 am
- Forum: Limiting Reactant Calculations
- Topic: Actual Yield
- Replies: 6
- Views: 577
Re: Actual Yield
actual yield will always be based on what the experiment produces when its executed in real life so yeah you won't have to calculate it
- Fri Oct 04, 2019 3:25 pm
- Forum: Balancing Chemical Reactions
- Topic: Strategies for Balancing Chemical Equations
- Replies: 12
- Views: 841
Re: Strategies for Balancing Chemical Equations
start with the element that exists only once on either side of the equation. For example: CO2 + CNO3 -->> N2 + CO2 + CO3 I know that's a weird equation that probably wouldn't exist in real life, but the element that exists only once will be easiest to track at the start and will make it easier to ba...
- Fri Oct 04, 2019 3:22 pm
- Forum: Empirical & Molecular Formulas
- Topic: Difference between empirical and molecular formulas
- Replies: 6
- Views: 2118
Re: Difference between empirical and molecular formulas
E (empirical) comes before M (molecular) in the alphabet. Empirical formulas are the basis of molecular formulas and come before molecular formulas, just as E comes before M.
- Fri Oct 04, 2019 3:20 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: G 7 problem
- Replies: 2
- Views: 217
Re: G 7 problem
As a start for reference, remember that 1ml of water = 1g. Because this is an aqueous solution, you'll be using that conversion. 1) 5.24% of 510g will give you the amount of KNO3 you need. Answer is 26.724 g. 2) Subtract 26.724 from 510g to get the # grams of water you need to reach 510g. 3) Convert...
- Fri Oct 04, 2019 3:13 pm
- Forum: Properties of Light
- Topic: c = fλ
- Replies: 9
- Views: 509
Re: c = fλ
the speed of light is always constant. light moves at the same speed no matter what
- Fri Oct 04, 2019 3:12 pm
- Forum: Properties of Light
- Topic: unit change
- Replies: 4
- Views: 246
Re: unit change
Hz is essentially just a label for /s. When saying 25 Hz, we mean 25 cycles per second. They mean the same thing
- Fri Oct 04, 2019 3:07 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Accuracy v Precision
- Replies: 11
- Views: 547
Re: Accuracy v Precision
accuracy = how close you are
precision = how consistent you are with your technique
precision = how consistent you are with your technique