Why did the attacking army use acid?
To neutralize the enemy’s base.
Search found 32 matches
- Wed Dec 05, 2018 8:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027095
- Wed Dec 05, 2018 8:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027095
Re: Post All Chemistry Jokes Here
What’s Iron Man’s favorite amusement park ride?
The ferrous wheel.
The ferrous wheel.
- Wed Dec 05, 2018 8:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027095
Re: Post All Chemistry Jokes Here
Did you hear about oxygen’s date with potassium?
It went OK.
It went OK.
- Wed Dec 05, 2018 8:38 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027095
Re: Post All Chemistry Jokes Here
Two chemists walk into a bar.
One says, “I’ll have an H2O.” The other says, “I’ll have an H2O, too.” The second chemist dies.
One says, “I’ll have an H2O.” The other says, “I’ll have an H2O, too.” The second chemist dies.
- Wed Dec 05, 2018 8:32 pm
- Forum: Conjugate Acids & Bases
- Topic: Neutralization Reactions
- Replies: 6
- Views: 989
Re: Neutralization Reactions
If they give you a salt as the product, I think we are supposed to identify the cation and anion and assume that the other product was liquid water and work from there.
- Wed Dec 05, 2018 8:31 pm
- Forum: Bronsted Acids & Bases
- Topic: Identifying the difference
- Replies: 6
- Views: 641
Re: Identifying the difference
The difference is in the definition of what each type considers an acid or base.
- Wed Dec 05, 2018 8:28 pm
- Forum: Lewis Acids & Bases
- Topic: Identifying Lewis Acids and Bases
- Replies: 3
- Views: 1183
Re: Identifying Lewis Acids and Bases
This is a good question, can someone answer it?
- Wed Dec 05, 2018 8:19 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Memorize strong and weak acids and bases?
- Replies: 3
- Views: 597
Re: Memorize strong and weak acids and bases?
I would say to memorize the seven strong acids and the reasoning why they are strong acids.
- Thu Nov 29, 2018 9:50 am
- Forum: Hybridization
- Topic: Difference between hybridization and hybrid orbitals
- Replies: 4
- Views: 765
Re: Difference between hybridization and hybrid orbitals
I believe these are the same thing. If anyone knows otherwise please correct me!
- Mon Nov 19, 2018 1:23 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Exam 3 Topics [ENDORSED]
- Replies: 6
- Views: 728
Re: Exam 3 Topics [ENDORSED]
For exams just look at the outlines on Professor Lavelle's website, they detail key concepts that we should know for the tests
- Mon Nov 19, 2018 1:16 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: AXE formula
- Replies: 32
- Views: 12344
Re: AXE formula
There really isn't another way, the best thing to do is just memorize them because the AXE formula tells you what shape the molecule is.
- Fri Nov 16, 2018 3:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Tetrahedral shape
- Replies: 5
- Views: 474
Re: Tetrahedral shape
Professor Lavelle mentioned in lecture that like other said above a molecule can always be distorted. For example CCl 4 is nonpolar since all of the dipole moments cancel out and is unlikely to be distorted however for a similar molecule that does have an overall dipole moment due to having two bond...
- Wed Nov 14, 2018 11:47 am
- Forum: Dipole Moments
- Topic: Dipole Moments [ENDORSED]
- Replies: 10
- Views: 1012
Re: Dipole Moments [ENDORSED]
An induced dipole is when a molecule that is usually non polar has become temporarily induced to have a dipole by surrounding molecules. I believe a dipole moment is just when a molecule itself has a dipole due the electronegativity of its constituent atoms. A dipole-dipole interaction is when any p...
- Wed Nov 14, 2018 11:36 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 3
- Views: 1474
Re: Bond Angles
We will most likely have to memorize the names of the shapes. As for bond angles if the central atom has no lone pairs I believe that we can calculate bond angle by dividing 360 the number of central atoms if it's in one plane but other wise we'll have to at the very least know them roughly. And if ...
- Wed Nov 14, 2018 11:28 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 438
Re: Bond Angles
We can calculate them using VSEPR if the central atom has no lone pairs by dividing 360 degrees by how many atoms are bonded to the central atom. However we cannot use this method when they are are lone pairs since VSEPR doesn't account for the distortion that happens when the lone pair and bonded e...
- Tue Nov 06, 2018 12:39 pm
- Forum: Dipole Moments
- Topic: Polar and Nonpolar
- Replies: 7
- Views: 815
Re: Polar and Nonpolar
You can calculate polar and non-polar with electronegativity levels since that will reveal whether an electron is shared unequally or not. For the most part diatomic molecules are non-polar.
- Tue Nov 06, 2018 12:36 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Electron Configuration
- Replies: 4
- Views: 561
Re: Electron Configuration
Elements like Cr and Cu (and the ones in the same columns) are different in that half full shells and half shells are more stable than not, making their electron configuration [Ar]3d^5 4s^1 and [Ar]3d^10 4s^1. But the concepts described above still are true in that electrons from the outmost energy ...
- Tue Nov 06, 2018 12:30 pm
- Forum: Electronegativity
- Topic: Electronegativity calculation
- Replies: 4
- Views: 1706
Re: Electronegativity calculation
When we calculate electronegativity, values will be given to us either in the form of a periodic table with those values listed or something similar.
- Wed Oct 31, 2018 11:39 am
- Forum: Dipole Moments
- Topic: London Forces
- Replies: 7
- Views: 961
Re: London Forces
London forces are instantaneous or temporary dipoles and it also induces surrounding atoms into having temporary dipoles as well. These are the smallest and individually very weak but actually are the most significant contributor to IMF for most molecules
- Fri Oct 19, 2018 6:05 pm
- Forum: Trends in The Periodic Table
- Topic: Transition metal question
- Replies: 3
- Views: 332
Re: Transition metal question
I don't know if there is a rule of thumb per say but generally atoms want to achieve a full valence shell, whether that be by losing or gaining through bonds. So rather than a general number I believe it depends on its position in the periodic table and how many valence electrons it has.
- Fri Oct 19, 2018 2:00 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Configuratin
- Replies: 5
- Views: 440
Re: Electron Configuratin
We lose the electrons from the s and p subshells first because if you look at the configuration, those subshells are within the 6th and outermost shell. The f and d subshells are within the 4th and 5th and closer to the nucleus and harder to "steal" in comparison to the electrons in the 6t...
- Fri Oct 19, 2018 1:52 pm
- Forum: DeBroglie Equation
- Topic: Wavelength unit conversion
- Replies: 4
- Views: 454
Re: Wavelength unit conversion
Yup, whenever doing calculations involving units make sure you have ones that allow you to cancel out what you don't need while ending up with the correct units for your answer. So yes in that case you would need mass in kg.
- Fri Oct 19, 2018 1:41 pm
- Forum: *Black Body Radiation
- Topic: Test
- Replies: 9
- Views: 1313
Re: Test
Blackbody radiation should not be on the test next week, the material that we have covered including today's lecture will be though.
- Thu Oct 11, 2018 10:57 pm
- Forum: *Black Body Radiation
- Topic: The Importance of Black Body Radiation (?)
- Replies: 5
- Views: 853
Re: The Importance of Black Body Radiation (?)
Don't know if this is how it's defined in this class but you can think of it as what happens when a massive bulky object that absorbs all radiation and then emits its own form of radiation. One example would be like a burner of an oven that heats up and changes color as it gets hotter from black to ...
- Thu Oct 11, 2018 10:31 pm
- Forum: Balancing Chemical Reactions
- Topic: How To....
- Replies: 16
- Views: 2648
Re: How To....
States of matter will come into play later when we go into topics like entropy and intramolecular forces but for now we don't really need to worry about them when writing chemical equations.
- Thu Oct 11, 2018 10:19 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Formula M1V1=M2V2 [ENDORSED]
- Replies: 5
- Views: 6511
Re: Formula M1V1=M2V2 [ENDORSED]
Yes we can use the that formula whenever we are given 3 of the 4 values or information to find those values.
- Mon Oct 08, 2018 8:59 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Changing Units
- Replies: 10
- Views: 844
Re: Changing Units
Typically your answer should be in the same units that it was given in the problem unless stated otherwise but Lavelle is okay with either as long as it's the right answer.
- Mon Oct 08, 2018 8:27 pm
- Forum: Limiting Reactant Calculations
- Topic: Theoretical vs Actual Yield
- Replies: 5
- Views: 3079
Re: Theoretical vs Actual Yield
Theoretical yield is the value you get if your reaction were to react to completion in an ideal world. However during experimentation there are a lot of things that can go wrong like residue on glassware, or side reactions that either take away from your original reaction or result in an impure prod...
- Mon Oct 08, 2018 8:22 pm
- Forum: Balancing Chemical Reactions
- Topic: States of Matter
- Replies: 11
- Views: 1067
Re: States of Matter
States of matter can come into play when you're writing net ionic equations like in problem M9. They'll also come into play when looking at solubility and what ions are actually interacting with each other in a precipitation reaction or why a solid is a solid and not another state of matter at a cer...
- Thu Oct 04, 2018 2:11 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: L.37 part B
- Replies: 1
- Views: 128
Re: L.37 part B
The molarity used in part B is found by solving part A. If you've done that, your answer should be the molarity used. The 100. ml just tells you how much volume you have, and doesn't change the molarity of the solution. You use this 100. ml value in a stoichiometric calculation to find how many mole...
- Thu Oct 04, 2018 2:05 pm
- Forum: Significant Figures
- Topic: Sig Figs... when to round?
- Replies: 7
- Views: 899
Re: Sig Figs... when to round?
If you round in between your answer could either be erroneously high or low (depending on whether or not you round up or down) and be off, so it's best to wait until the very end and keep all your number in your calculator if you can.
- Thu Oct 04, 2018 1:59 pm
- Forum: SI Units, Unit Conversions
- Topic: pm to m
- Replies: 6
- Views: 956
Re: pm to m
Rather than just the conversion from pm to m, I think we need to be aware and know of all the different prefixes and what they mean since it will be easier to perform conversions like that when doing calculations.