Search found 22 matches
- Tue Aug 01, 2017 10:58 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Given reactants, how do you find overall equation, complete ionic and net ionic equations (Fundamentals J.5)?
- Replies: 1
- Views: 504
Given reactants, how do you find overall equation, complete ionic and net ionic equations (Fundamentals J.5)?
J.5. How do you approach this? Complete the overall equation, and write the complete ionic equation and the net ionic equation for each of the following acid–base reactions. If the substance is a weak acid or base, leave it in its molecular form in the equations. a)HF + NaOH ---> b) (CH3)3N + HNO3 -...
- Tue Aug 01, 2017 10:53 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: How would you know which reactants/products create certain compounds (ex J.7)?
- Replies: 2
- Views: 710
How would you know which reactants/products create certain compounds (ex J.7)?
Fundamentals problem J.7. How do you approach this? Select an acid and a base for a neutralization reaction that results in the formation of (a) potassium bromide; (b) zinc nitrite; (c) calcium cyanide, Ca(CN)2; (d) potassium phosphate. Write the balanced equation for each reaction. Anything we're s...
- Tue Aug 01, 2017 10:48 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why is NH3 a base while NH4 an acid? H2S03? [ENDORSED]
- Replies: 2
- Views: 12655
Why is NH3 a base while NH4 an acid? H2S03? [ENDORSED]
Why are NH4 and H2SO3 a acids? I thought only lone protons were acidic. How can we tell from formulas like these whether compound is an acid or base?
- Mon Jul 31, 2017 3:13 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Hydronium and Hydroxide Ions
- Replies: 1
- Views: 565
Hydronium and Hydroxide Ions
Since Ka+ Kb= Kw, does this mean that whenever there are hydronium ions present this means hydroxide ions are too (and vice versa)? Or can a reaction only result in one or the other?
- Mon Jul 31, 2017 2:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Partial pressure definition
- Replies: 3
- Views: 675
Partial pressure definition
Why is partial pressure called "partial" pressure? Where is the other part? Lol
EDIT: Thanks all great responses I get it now lol!
EDIT: Thanks all great responses I get it now lol!
- Mon Jul 31, 2017 2:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Question 11.64
- Replies: 1
- Views: 473
Question 11.64
How do you solve this?
Calculate the concentration of CO(g) in mol.m-3 at 423 K and 0.8 atm using R = 8.206 × 10-5 m3.atm.K-1.mol-1 and assuming only CO(g) is present.
Calculate the concentration of CO(g) in mol.m-3 at 423 K and 0.8 atm using R = 8.206 × 10-5 m3.atm.K-1.mol-1 and assuming only CO(g) is present.
- Mon Jul 31, 2017 2:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Question 11.67
- Replies: 2
- Views: 699
Question 11.67
How do you solve this? The reaction 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) occurs in a 1.00 L flask at 312 K and at equilibrium the concentrations are 0.075 mol.L-1 SO2 (g), 0.537 mol.L-1 O2 (g), and 0.925 mol.L-1 SO3 (g). Calculate their respective partial pressures at 312 K using R = 8.206 × 10-2 L.atm.K-...
- Mon Jul 31, 2017 2:45 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What does it mean exactly that the reactions are at equilibrium?
- Replies: 3
- Views: 616
What does it mean exactly that the reactions are at equilibrium?
I just cannot picture this as I am used to thinking of reactions as two reactants (2H2+O2) reacting to form a product (2H20). Or, at first you have A+B, and then you have C. How can you simultaneously have A and B and C???
- Sun Jul 16, 2017 11:47 pm
- Forum: Ionic & Covalent Bonds
- Topic: Cation vs Anion
- Replies: 4
- Views: 2729
Re: Cation vs Anion
a good way to remember is
CATS have PAWS. Cations are positive.
An a-n-ion is a-negative-ion
CATS have PAWS. Cations are positive.
An a-n-ion is a-negative-ion
- Sun Jul 16, 2017 11:43 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity vs Ionization Energy [ENDORSED]
- Replies: 2
- Views: 657
Electron Affinity vs Ionization Energy [ENDORSED]
If IE is how much an atom dislikes electrons and EA is how much atoms like to attract them, then how can Flourine be high in both?
- Sun Jul 16, 2017 11:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988569
Re: Post All Chemistry Jokes Here
what do you get when you combine Helium, Yttrium, Selenium, and Xenon?
HeYSeXe :*
HeYSeXe :*
- Sun Jul 16, 2017 11:37 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988569
Re: Post All Chemistry Jokes Here
https://fthmb.tqn.com/NvhQ7m6ggjSwYgsQs ... o_upscale()/about/funny-science-meme-breaking-bad-58b5ae553df78cdcd89ec4b4.jpg
- Sun Jul 16, 2017 11:31 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: The magnetic quantum number
- Replies: 2
- Views: 578
The magnetic quantum number
is it correct that the magnetic quantum number can only have 3 values, and that these values correspond with each orbital? If m(l) was -1, what would this say about the electron/atomic structure?
- Sun Jul 09, 2017 10:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988569
Re: Post All Chemistry Jokes Here
An elements letter to an ex:
I sulfur when you argon
I sulfur when you argon
- Sun Jul 09, 2017 10:23 pm
- Forum: Trends in The Periodic Table
- Topic: List of all trends?
- Replies: 5
- Views: 1016
List of all trends?
Can someone/ some people list all the trends in the table for easy access? thanks
- Sun Jul 09, 2017 10:22 pm
- Forum: *Shrodinger Equation
- Topic: Shrodinger Equation
- Replies: 1
- Views: 407
Shrodinger Equation
When exactly will we use the Shrodinger Equation?
- Sun Jul 09, 2017 10:20 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polyatomic Lewis Structures
- Replies: 5
- Views: 1399
Polyatomic Lewis Structures
Why is it that we add/subtract electrons when creating lewis structures? (ex if it is molecule3+, we'd subtract 3 electrons from the entire model)
- Sun Jul 02, 2017 11:31 pm
- Forum: Einstein Equation
- Topic: What is the difference between deltaE=hv and E=hv?
- Replies: 5
- Views: 13778
Re: What is the difference between deltaE=hv and E=hv?
good explanation^^ From my understanding, you use deltaE=hv when there is a change, a loss or a gaining of Energy.
E=hv is an equation that tells you how much energy a photon has in this moment.
E=hv is an equation that tells you how much energy a photon has in this moment.
- Sun Jul 02, 2017 11:24 pm
- Forum: Properties of Light
- Topic: Light is a Wave, Light is Photons
- Replies: 3
- Views: 734
Re: Light is a Wave, Light is Photons
My next question would then be, what instances is light acting as a series of photons vs merely a wave?
- Sun Jul 02, 2017 11:16 pm
- Forum: DeBroglie Equation
- Topic: verified/detected wavelengths
- Replies: 2
- Views: 666
Re: verified/detected wavelengths
I have the same question about the specific reasoning, but I believe Lavelle said in class that the cut off is anything smaller than 10^-14 or 10^-16. I was trying to piece the reasoning together in my head..I pictured that if the trough to trough distance was too small it wouldn't operate as a para...
- Sun Jul 02, 2017 11:01 pm
- Forum: General Science Questions
- Topic: Chemical Reactions vs Physical Changes
- Replies: 1
- Views: 743
Chemical Reactions vs Physical Changes
I understand that chemical reactions are reactions within which new bonds have formed, resulting in an irreversible change.A physical change however is a reversible change. I was taught that Mixing vinegar and baking soda results in a chemical reaction. However, after recently doing this I noticed t...
- Sun Jul 02, 2017 10:35 pm
- Forum: Properties of Light
- Topic: Light is a Wave, Light is Photons
- Replies: 3
- Views: 734
Light is a Wave, Light is Photons
If light acts like both a wave and a series of photons, are there certain instances where it is acting like one or the other, or both? Do we know or can we predict such instances?