Search found 30 matches
- Sun Dec 09, 2018 2:29 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong base
- Replies: 5
- Views: 717
Re: Strong base
It is a strong base because it fully ionizes in water, so the OH- comes off and the molecule doesn't have anymore.
- Sun Dec 09, 2018 2:28 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong acid
- Replies: 6
- Views: 779
Re: Strong acid
It is a strong acid because it fully ionizes in water, it fully disassociates.
- Sun Dec 09, 2018 2:28 pm
- Forum: Bronsted Acids & Bases
- Topic: Are all molecules with a H amphiprotic?
- Replies: 2
- Views: 582
Re: Are all molecules with a H amphiprotic?
Not all do, for example Al2O3 and B2O3
- Sun Dec 09, 2018 2:27 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted acid
- Replies: 9
- Views: 957
Re: Bronsted acid
It's a strong acid because it completely disassociates by losing its one proton, H+.
- Sun Dec 09, 2018 2:25 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: sig figs
- Replies: 4
- Views: 488
Re: sig figs
I personally just round off to sig figs at the very end of the problem.
- Sun Dec 09, 2018 2:24 pm
- Forum: Conjugate Acids & Bases
- Topic: Stability of Conjugate Base
- Replies: 6
- Views: 3681
Re: Stability of Conjugate Base
Usually, if the conjugate base is more stable, the resulting acid will be stronger.
- Sun Dec 09, 2018 2:23 pm
- Forum: Air Pollution & Acid Rain
- Topic: Acid Rain Formation
- Replies: 6
- Views: 790
Re: Acid Rain Formation
Compounds such as sulfur dioxide and nitrogen oxides mix with water in the atmosphere to form acids, which eventually have the capability to harm the soil and hence the flora.
- Sun Dec 09, 2018 2:21 pm
- Forum: Bronsted Acids & Bases
- Topic: Lewis vs Bronsted
- Replies: 10
- Views: 1483
Re: Lewis vs Bronsted
Bronsted acids donate protons, and bronsted bases accept protons; while Lewis acids accept electrons, and Lewis bases donate electrons.
- Sun Dec 09, 2018 2:19 pm
- Forum: Polyprotic Acids & Bases
- Topic: Polyprotic Question!
- Replies: 12
- Views: 1684
Re: Polyprotic Question!
If a compound is polyprotic then it means that it can lose more than one proton. So it'll probably have something like "Hsub2"
- Sun Dec 09, 2018 2:18 pm
- Forum: Amphoteric Compounds
- Topic: Amphiprotic vs Amphoteric
- Replies: 5
- Views: 718
Re: Amphiprotic vs Amphoteric
Amphiprotic means that the compound can both accept and donate electrons; while amphoteric means that the compounds can react as both acids and bases.
- Sun Dec 09, 2018 2:15 pm
- Forum: Dipole Moments
- Topic: London Dispersion
- Replies: 5
- Views: 928
Re: London Dispersion
In the case of a bigger atom, there are more electrons so the greater area can mean that London Forces are stronger than Dipole-Dipole
- Sun Dec 09, 2018 2:09 pm
- Forum: Lewis Structures
- Topic: Lewis Acids & Bases
- Replies: 3
- Views: 580
Re: Lewis Acids & Bases
Lewis acids accept pairs of electrons, while Lewis bases donate pairs of electrons.
- Sun Dec 09, 2018 2:07 pm
- Forum: Sigma & Pi Bonds
- Topic: Why are sigma bonds stronger than pi bonds?
- Replies: 10
- Views: 4569
Re: Why are sigma bonds stronger than pi bonds?
Sigma bonds overlap head to head, as opposed to pi bonds that overlap through the sides of p orbitals.
- Sun Dec 09, 2018 2:06 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionic and covalent bonds
- Replies: 5
- Views: 643
Re: ionic and covalent bonds
Yeah, they both do. Highest values are at Flourine.
- Sun Dec 09, 2018 2:04 pm
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 3
- Views: 683
Cisplatin
How do you draw it?
- Sat Dec 08, 2018 11:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 20138
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Thank you so much! That was very helpful.
- Sat Dec 08, 2018 10:08 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Weak bases and weak acids
- Replies: 1
- Views: 399
Weak bases and weak acids
why do salts of weak bases produce acidic solutions and salts of weak acids produce basic
solutions?
solutions?
- Sat Dec 08, 2018 9:56 pm
- Forum: Biological Examples
- Topic: Myoglobin, Hemoglobin, and Heme Complex
- Replies: 2
- Views: 449
Myoglobin, Hemoglobin, and Heme Complex
What specifically do we need to know about these coordination compounds?
- Sat Dec 08, 2018 9:46 pm
- Forum: Naming
- Topic: Do we need to know the ligand (en)?
- Replies: 2
- Views: 355
Do we need to know the ligand (en)?
Do we need to be able to write out the whole ligand, or is putting (en) sufficient?
- Sat Dec 08, 2018 6:17 pm
- Forum: Biological Examples
- Topic: Chemotherapy Drugs
- Replies: 1
- Views: 467
Chemotherapy Drugs
What are the well-known examples of coordination compounds used as chemotherapy drugs that we need to know?
- Sat Dec 08, 2018 4:08 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Calculating pH and the pOH
- Replies: 2
- Views: 301
Calculating pH and the pOH
If given the amount of hydronium ion in a solution, how would you find pOH?
- Fri Dec 07, 2018 10:12 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Regarding the final
- Replies: 2
- Views: 360
Re: Regarding the final
This is what his outline says to know: Identify common drinks, foods, and household items as acidic or basic. • Describe chemical properties of acids, bases and amphoteric compounds. • Draw the structures of acids, bases and amphoteric compounds. • Recognize acids and bases from their formulas and/o...
- Fri Dec 07, 2018 10:05 pm
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1691
Re: Calculators
I have a TI-30x and it works really well.
- Thu Nov 01, 2018 12:58 pm
- Forum: Trends in The Periodic Table
- Topic: Implications of ionization energy
- Replies: 2
- Views: 206
Re: Implications of ionization energy
The atoms with a lower ionization energy have a greater ability to bond with other atoms since they have more "open spots" to form an octet. Because of this, the atom with more spots to bond goes in the middle and the ones with less go on the outside (for example Hydrogen).
- Thu Nov 01, 2018 12:52 pm
- Forum: Resonance Structures
- Topic: Resonance
- Replies: 8
- Views: 912
Re: Resonance
The resonance structures themselves don't actually exist in real life, but that's how we are able to model what the structure of the molecule actually looks like, which is an average of all the resonance structures.
- Sun Oct 14, 2018 11:00 pm
- Forum: Properties of Light
- Topic: 6th edition homework 1.13 Rydberg Formula
- Replies: 1
- Views: 112
Re: 6th edition homework 1.13 Rydberg Formula
The Rydberg formula is E(n)= -[(h)(R)]/n^2
However to calculate the change in energy, you must also do E(final) - E(initial).
However to calculate the change in energy, you must also do E(final) - E(initial).
- Mon Oct 08, 2018 9:58 pm
- Forum: Einstein Equation
- Topic: Einstein's Equation: E=hv
- Replies: 11
- Views: 1453
Re: Einstein's Equation: E=hv
Planck's constant, defined as 6.63*10^-34 Joule*seconds
- Mon Oct 08, 2018 9:53 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect
- Replies: 6
- Views: 412
Re: Photoelectric Effect
That represents the kinetic energy of the electron after it is ejected from the surface of the metal. The m(e-) is the mass of the electron and v(e-) represents the velocity of the electron when it is ejected.
- Sun Oct 07, 2018 3:48 pm
- Forum: Significant Figures
- Topic: Sig Figs & Molar Mass
- Replies: 4
- Views: 564
Re: Sig Figs & Molar Mass
I'm not sure exactly what you're supposed to do, but when I calculate molar mass I go to the amount of sig figs in other numbers given in the problem.
- Thu Oct 04, 2018 5:50 pm
- Forum: Empirical & Molecular Formulas
- Topic: Converting from mole ratios to empirical formula
- Replies: 2
- Views: 495
Re: Converting from mole ratios to empirical formula
You want the numbers that are decimals to be as close as possible to a whole number. In this case: 2.67 x 1 = 2.67 (not close to a whole number) 2.67 x 2 = 5.34 (not close to a whole number) 2.67 x 3 = 8.01 (close to a whole number) So if you multiply all the mole numbers by 3, you get 3 oxygen, 8 h...