Search found 22 matches

by Yolandia Winn 1A
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: 220

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 -...
by Yolandia Winn 1A
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: 412

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...
by Yolandia Winn 1A
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: 1627

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?
by Yolandia Winn 1A
Mon Jul 31, 2017 3:13 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Hydronium and Hydroxide Ions
Replies: 1
Views: 309

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?
by Yolandia Winn 1A
Mon Jul 31, 2017 2:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Partial pressure definition
Replies: 3
Views: 290

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!
by Yolandia Winn 1A
Mon Jul 31, 2017 2:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Question 11.64
Replies: 1
Views: 231

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.
by Yolandia Winn 1A
Mon Jul 31, 2017 2:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Question 11.67
Replies: 2
Views: 295

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-...
by Yolandia Winn 1A
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: 276

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???
by Yolandia Winn 1A
Sun Jul 16, 2017 11:47 pm
Forum: Ionic & Covalent Bonds
Topic: Cation vs Anion
Replies: 4
Views: 699

Re: Cation vs Anion

a good way to remember is
CATS have PAWS. Cations are positive.
An a-n-ion is a-negative-ion
by Yolandia Winn 1A
Sun Jul 16, 2017 11:43 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity vs Ionization Energy [ENDORSED]
Replies: 2
Views: 329

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?
by Yolandia Winn 1A
Sun Jul 16, 2017 11:40 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019644

Re: Post All Chemistry Jokes Here

what do you get when you combine Helium, Yttrium, Selenium, and Xenon?

HeYSeXe :*
by Yolandia Winn 1A
Sun Jul 16, 2017 11:37 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019644

Re: Post All Chemistry Jokes Here

https://fthmb.tqn.com/NvhQ7m6ggjSwYgsQs ... o_upscale()/about/funny-science-meme-breaking-bad-58b5ae553df78cdcd89ec4b4.jpg
by Yolandia Winn 1A
Sun Jul 16, 2017 11:31 pm
Forum: Quantum Numbers and The H-Atom
Topic: The magnetic quantum number
Replies: 2
Views: 290

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?
by Yolandia Winn 1A
Sun Jul 09, 2017 10:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019644

Re: Post All Chemistry Jokes Here

An elements letter to an ex:

I sulfur when you argon
by Yolandia Winn 1A
Sun Jul 09, 2017 10:23 pm
Forum: Trends in The Periodic Table
Topic: List of all trends?
Replies: 5
Views: 433

List of all trends?

Can someone/ some people list all the trends in the table for easy access? thanks
by Yolandia Winn 1A
Sun Jul 09, 2017 10:22 pm
Forum: *Shrodinger Equation
Topic: Shrodinger Equation
Replies: 1
Views: 214

Shrodinger Equation

When exactly will we use the Shrodinger Equation?
by Yolandia Winn 1A
Sun Jul 09, 2017 10:20 pm
Forum: Ionic & Covalent Bonds
Topic: Polyatomic Lewis Structures
Replies: 5
Views: 664

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)
by Yolandia Winn 1A
Sun Jul 02, 2017 11:31 pm
Forum: Einstein Equation
Topic: What is the difference between deltaE=hv and E=hv?
Replies: 5
Views: 3049

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.
by Yolandia Winn 1A
Sun Jul 02, 2017 11:24 pm
Forum: Properties of Light
Topic: Light is a Wave, Light is Photons
Replies: 3
Views: 345

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?
by Yolandia Winn 1A
Sun Jul 02, 2017 11:16 pm
Forum: DeBroglie Equation
Topic: verified/detected wavelengths
Replies: 2
Views: 311

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...
by Yolandia Winn 1A
Sun Jul 02, 2017 11:01 pm
Forum: General Science Questions
Topic: Chemical Reactions vs Physical Changes
Replies: 1
Views: 448

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...
by Yolandia Winn 1A
Sun Jul 02, 2017 10:35 pm
Forum: Properties of Light
Topic: Light is a Wave, Light is Photons
Replies: 3
Views: 345

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?

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