Search found 31 matches
- Thu Jun 14, 2018 6:10 pm
- Forum: Lewis Structures
- Topic: lewis structure
- Replies: 10
- Views: 1011
Re: lewis structure
The least electronegative, an one capable of making the most bond should be in the center.
- Thu Jun 14, 2018 6:09 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionic character
- Replies: 11
- Views: 2098
Re: ionic character
megangeorge-1F wrote:what is the difference between something being ionic or dipole?
I believe the difference between ionic and dipole is that ionic is a force between an ion and polar molecule, while dipole is between a hydrogen bond that is slightly positive on one molecule and slightly negative on another.
- Thu Jun 14, 2018 6:05 pm
- Forum: Lewis Structures
- Topic: Octet Rule
- Replies: 5
- Views: 818
Re: Octet Rule
The Lewis structure should have C as the central atom. C should have a double bond with S and single bonds to the 2 Fs.
- Thu Jun 14, 2018 5:55 pm
- Forum: Hybridization
- Topic: How to figure out hybridization
- Replies: 5
- Views: 1199
Re: How to figure out hybridization
You're looking for regions of electron density. When looking at the VSEPR formula for SO2 you see it would be AX2E (3 total) which in turn will equal to sp2
- Thu Jun 14, 2018 5:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: hw 4.21d
- Replies: 2
- Views: 677
Re: hw 4.21d
It is more stable for N in N2H4 to not have double bond. So N will have 3 bonds w H and 1 lone pair. This is trigonal pyramidal which is equal to 107 degrees. C2H4 would be able to have a double bond hence the different answers.
- Thu Jun 14, 2018 5:49 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge Exponent
- Replies: 5
- Views: 1011
Re: Formal Charge Exponent
If one of the molecule's components has a negative charge, the entire compound takes on the charge as a whole.
- Thu Jun 14, 2018 5:48 pm
- Forum: Hybridization
- Topic: Hybridization [ENDORSED]
- Replies: 3
- Views: 582
Re: Hybridization [ENDORSED]
With 2 lone pairs and 4 bonds with F, totals up to 6. So it would be sp3d2 hybridization
- Thu Jun 14, 2018 5:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2957143
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0 K?
- Thu Jun 14, 2018 5:46 pm
- Forum: Properties of Light
- Topic: Frequency vs Cycle
- Replies: 5
- Views: 668
Re: Frequency vs Cycle
Frequency is like multiple cycles over a time. While a cycle is just when a wave completes a whole period
- Thu Jun 14, 2018 5:45 pm
- Forum: Lewis Acids & Bases
- Topic: HI or HCl: stronger acid
- Replies: 8
- Views: 10443
Re: HI or HCl: stronger acid
HI would be the stronger acid, as iodine's atomic radius is much larger than Cl's. So iodine is more evenly distributed when ionized
- Wed Jun 13, 2018 9:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Chapter 4 #21A Angle [ENDORSED]
- Replies: 1
- Views: 403
Chapter 4 #21A Angle [ENDORSED]
Why are the angles for C2H4 120 degrees instead of 109.5? I thought it was tetrahedral.
- Wed Jun 13, 2018 4:26 am
- Forum: Lewis Acids & Bases
- Topic: Strong Acid
- Replies: 8
- Views: 1121
Re: Strong Acid
A strong acid can completely disassociate in water. As they have hydrogen ions, the higher the hydrogen concentration, the lower the pH is. In a compound it is dependent on the H bond and the negative ion.
Re: Naming
An ion is an particle that has a charge, positive or negative. If there's no charge, it's not an ion. In a compound, it is usually at the end.
- Wed Jun 13, 2018 4:22 am
- Forum: Naming
- Topic: Naming and Polyatomic Ions
- Replies: 6
- Views: 987
Re: Naming and Polyatomic Ions
I think it is fine to use it interchangeably. It would be safe to memorize the polyatomic ions as we need their charges to find the oxidation number and create our formula. However, I don't think it's too imperative. Hopefully, they're providing it for the most part.
- Wed Jun 13, 2018 4:17 am
- Forum: Bond Lengths & Energies
- Topic: Bond Angles
- Replies: 3
- Views: 589
Re: Bond Angles
Typically you do not have to be that specific. However, I believe in my section it was said 1 lone pair is more than 109.5 and 2 is less than 109.5 too.
Re: Oxidation
For practice, I wrote these on my periodic table while studying, and over time you see the pattern and are able to memorize easier.
Group 1: +1
Group 2: +2
Ag: + Zn: +2
Group 13: +3
Group 14: 0
Group 15: -3
Group 16: -2
Group 17: -1
Group 1: +1
Group 2: +2
Ag: + Zn: +2
Group 13: +3
Group 14: 0
Group 15: -3
Group 16: -2
Group 17: -1
- Wed Jun 13, 2018 4:09 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Perchlorate (ClO4)-
- Replies: 7
- Views: 12426
Re: Perchlorate (ClO4)-
Chlorine is the central atom, and for central atoms you want the formal charge to be 0. The negative charge should be on the others, especially in this instance O is more electronegative than Cl.
- Wed Jun 13, 2018 4:06 am
- Forum: Hybridization
- Topic: S-Character and Bond Angle Relationship
- Replies: 3
- Views: 2489
Re: S-Character and Bond Angle Relationship
The s-character means the single bond, or sigma in the hybridization. Like sp, half is s-character and the other half is p-character.Or in sp3 its 1/4 s-character and 3/4 p-character. When there are more s-characters in a bond, the bond grows shorter yet stronger. It's all about the atom amount, jus...
- Wed Jun 13, 2018 3:59 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: ClO2+ Chapter 4 Homework Problem 5
- Replies: 1
- Views: 722
ClO2+ Chapter 4 Homework Problem 5
Should the shape for ClO3+ really be trigonal bipyramidal? There's two bonding pairs and 1 nonbonding pair, AX2E1. Shouldn't it be bent? I searched for reasoning but it doesn't make sense to me...
- Mon Apr 23, 2018 12:01 am
- Forum: Properties of Light
- Topic: Test 2 Material
- Replies: 12
- Views: 1139
Re: Test 2 Material
The material on Test 2 wil cover Chapter 1 to 1.5 "(wave and photon properties of light; Einstein equation; photoelectric effect; Bohr frequency condition; atomic spectra (electronic transitions); wave and particle properties of electrons, protons, etc.; DeBroglie equation)". This was all ...
- Sun Apr 22, 2018 11:58 pm
- Forum: Properties of Light
- Topic: Amplitude and Intensity
- Replies: 6
- Views: 676
Re: Amplitude and Intensity
Intensity is the measurable amount of a property, such as brightness. While light is a range of electromagnetic radiation detectable by the human eye. Intensity can be a property of light, and more information can be found in 1.2 of the textbook.
- Sun Apr 22, 2018 11:50 pm
- Forum: *Black Body Radiation
- Topic: Temperature relates to brightness?
- Replies: 2
- Views: 766
Re: Temperature relates to brightness?
Those three terms do not mean the same thing. Temperature is a property that tells you the degree of heat in an object. Brightness is a property that tells you the extent of light reflection there is of an object. Intensity is how concentrated/how much of there in temperature of brightness. So it co...
- Sun Apr 22, 2018 11:45 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 146661
Re: Reading the textbook
In my own experience, reading the textbook helps me to clear up any confusions I have. When you already have the foundations from going to lecture down, reading the textbook solidifies any small misconceptions or reaffirms what you know. It's good to read it in order to absolutely make sure you are ...
- Sun Apr 22, 2018 11:45 pm
- Forum: Ionic & Covalent Bonds
- Topic: Types of Bonds
- Replies: 10
- Views: 1190
Re: Types of Bonds
Covalent bond is a bond between two nonmetals, while an ionic bond is a bond between a nonmetal and a metal. You're able to easily discern this by looking at the elements of the equation from the periodic table.
- Sun Apr 15, 2018 11:35 pm
- Forum: Balancing Chemical Reactions
- Topic: Suggestions for Balancing Reactions
- Replies: 8
- Views: 960
Re: Suggestions for Balancing Reactions
I like to record out the amount for each element on each side, it makes it more clear to me and helps with memory. It is a good way to refer back to proper numbers and assure you're on the right track for calculations.
- Sun Apr 15, 2018 10:54 pm
- Forum: Limiting Reactant Calculations
- Topic: Reagent vs. Reactant [ENDORSED]
- Replies: 6
- Views: 1356
Re: Reagent vs. Reactant [ENDORSED]
There's no difference between reactant or reagent, these these terms are used interchangeably and do not mean anything different.
- Sun Apr 15, 2018 10:52 pm
- Forum: Ionic & Covalent Bonds
- Topic: C2+ C2-
- Replies: 4
- Views: 5135
Re: C2+ C2-
Since C2- has extra electrons, the negative charge gives it a stronger, stable bond that makes it harder to pull an electron away. In valence electrons, there are 8 VE for C2- and 4 VE for C2+.
- Sun Apr 15, 2018 10:50 pm
- Forum: SI Units, Unit Conversions
- Topic: Sig figures
- Replies: 9
- Views: 570
Re: Sig figures
The amount of significant figures you need is dependent on the equation you're solving. The number you use is the least number of decimal places for your answer. However, it is not always the case, you need to know the proper mathematical operation rules to determine case by case.
- Sun Apr 08, 2018 10:47 pm
- Forum: Significant Figures
- Topic: Why are sig figs important?
- Replies: 13
- Views: 16079
Re: Why are sig figs important?
Significant figures are important because it normalizes different data sets throughout calculations, because as you do more calculations the data becomes less precise. Therefore, significant figures allow for more precision.
- Sun Apr 08, 2018 10:42 pm
- Forum: SI Units, Unit Conversions
- Topic: writing out conversions in one long line vs. steps
- Replies: 16
- Views: 1392
Re: writing out conversions in one long line vs. steps
Typically, I prefer to write it out in a long line just so I can see it all in one condensed space. However, it really is up to your own preference, and doesn't matter as long as you personally understand the material.
- Fri Apr 06, 2018 2:13 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Dimensional Analysis Help [ENDORSED]
- Replies: 6
- Views: 644
Re: Dimensional Analysis Help [ENDORSED]
Dimensional analysis is essential throughout all of chemistry. We frequently receive values that can't immediately be applied to the equation problem, unless you convert it to it's proper value. It is then you are able to apply it to your equation/problem and solve. For instance, meters to kilometer...