Search found 17 matches

by RahilVaknalliDis3A
Tue Dec 05, 2017 10:43 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Oxoacids
Replies: 1
Views: 210

Re: Oxoacids

An oxyacid is an acid containing hydrogen, n number of oxygen atoms and a halogen. We need to understand how the strength of the acid varies with respect to the number of oxygen atoms and electronegativity of the halogen. If there are more oxygen atoms present, the acid is stronger since the resulti...
by RahilVaknalliDis3A
Mon Dec 04, 2017 7:33 pm
Forum: Lewis Acids & Bases
Topic: 12.119
Replies: 1
Views: 197

12.119

The solutions manual mentioned that Boric acid is a weak acid because it does not have a conjugate system to delocalize the electrons on the oxygen to weaken the O-H bond. What does this mean?
by RahilVaknalliDis3A
Mon Dec 04, 2017 7:29 pm
Forum: Bronsted Acids & Bases
Topic: Solutions containing Multiple Weak acids
Replies: 1
Views: 208

Solutions containing Multiple Weak acids

In a solution containing multiple weak acids, if Acid A is stronger than Acid B, does it imply that Acid B is acting as a base? Similarly. if you add a weak base such as ammonia - how do you determine its behaviour if its solvent is a weak acid.
by RahilVaknalliDis3A
Mon Dec 04, 2017 7:22 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of Acids and Bases [ENDORSED]
Replies: 5
Views: 552

Re: Strength of Acids and Bases [ENDORSED]

Why can formic acid better stabilize the negative charge? What does it mean for the methyl group to be electron donating?
by RahilVaknalliDis3A
Mon Dec 04, 2017 2:30 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of Acids and Bases [ENDORSED]
Replies: 5
Views: 552

Strength of Acids and Bases [ENDORSED]

Why does the number of O atoms in an oxyacid affect its strength? Why is acetic acid weaker than formic acid?
by RahilVaknalliDis3A
Tue Nov 28, 2017 2:39 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: 11.1
Replies: 4
Views: 365

Re: 11.1

I think this implies that increasing the concentration of the reactants would push the formation of more product, hence increasing the concentration of the product. But this still makes sure that the ratio of the concentration of products/ concentration of reactants remains the same, therefore the v...
by RahilVaknalliDis3A
Tue Nov 28, 2017 2:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Dipole moments
Replies: 2
Views: 283

Re: Dipole moments

There are different cases when the dipole moments cancel out. You need to look at the VSEPR structure and the dipole moment of the individual bonds. If one of the individual bonds is more polar than another bond, there will be a net dipole moment, making the entire molecule polar. If all the bonds i...
by RahilVaknalliDis3A
Sun Nov 26, 2017 10:40 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Relation between K and Q
Replies: 2
Views: 466

Relation between K and Q

Why is there more products formed when Q is less than K? How does Gibbs free energy fit into this equation? I thought that there was a linear relationship between K and Q.
by RahilVaknalliDis3A
Tue Nov 07, 2017 4:19 pm
Forum: Octet Exceptions
Topic: Resonance Structures and Isomers
Replies: 2
Views: 363

Resonance Structures and Isomers

What is the difference between a resonance structure and an isomer?
by RahilVaknalliDis3A
Mon Nov 06, 2017 12:12 pm
Forum: Octet Exceptions
Topic: Incomplete Octet Vs Radical [ENDORSED]
Replies: 2
Views: 395

Incomplete Octet Vs Radical [ENDORSED]

Based on the Lewis structure of a molecule, how do you differentiate between those that are radicals and those that have an incomplete octet?
by RahilVaknalliDis3A
Sun Oct 29, 2017 2:59 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Subshells [ENDORSED]
Replies: 2
Views: 374

Electron Subshells [ENDORSED]

What does it mean when we say that an electron can penetrate through the inner shells? The book mentions how the s electron can penetrate through the inner shells. Is this valid for all elements?
by RahilVaknalliDis3A
Sun Oct 29, 2017 2:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Orbital Energies for Many-Electron Atoms
Replies: 1
Views: 185

Re: Orbital Energies for Many-Electron Atoms

The nucleus of many-electron atoms has a higher charge than the hydrogen nucleus and this causes it to attract electrons more strongly. The repulsion of electrons opposes nuclear attraction and raises the energy of the orbitals. The hydrogen atom has no electron electron repulsions.
by RahilVaknalliDis3A
Sat Oct 14, 2017 11:11 am
Forum: Photoelectric Effect
Topic: Photoelectric Effect Doubt [ENDORSED]
Replies: 4
Views: 374

Photoelectric Effect Doubt [ENDORSED]

Is the intensity of the radiation the rate at which photons arrive and hit the metal or is it the number of photons present as a result of the amplitude of light?
by RahilVaknalliDis3A
Thu Oct 12, 2017 9:36 pm
Forum: Photoelectric Effect
Topic: Example 1.5 Analyzing the Photoelectric Effect
Replies: 1
Views: 182

Re: Example 1.5 Analyzing the Photoelectric Effect

Part c wants you to imagine that the total energy = Work function since it's asking for the longest wavelength radiation which will have photons with the least amount of energy. The problem uses a combination of both the hv = Work function and the c= Frequency x Wavelength to solve for the wavelengt...
by RahilVaknalliDis3A
Thu Oct 12, 2017 9:22 pm
Forum: Photoelectric Effect
Topic: Constants that need to be memorized
Replies: 6
Views: 482

Constants that need to be memorized

I was unsure which constants need to be memorized, other than Planck's constant and the Rydberg formula. Do we also need to know the conversion of EV to Joules?
by RahilVaknalliDis3A
Tue Oct 03, 2017 11:32 pm
Forum: Molarity, Solutions, Dilutions
Topic: E 29 part c
Replies: 12
Views: 1749

Re: E 29 part c

You are on the right track. I believe there is a simple calculation error since you are multiplying the number of moles of water molecules with the wrong number. Avogradro's constant is 6.022 x 1023 and not 6.0022 x 1023
by RahilVaknalliDis3A
Tue Oct 03, 2017 11:03 pm
Forum: Molarity, Solutions, Dilutions
Topic: G7 - Homework Problem
Replies: 5
Views: 522

G7 - Homework Problem

You need to prepare 510 g of an aqueous solution containing 5.45% of KNO3 by mass. Describe how you would prepare the solution and what mass of each component would you use.

Is there a specific reaction we need to know about? I managed to calculate the mass of water and salt using the information.

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