Search found 27 matches

by Kalsuda Lapborisuth 1B
Sun Jun 10, 2018 9:45 pm
Forum: Bronsted Acids & Bases
Topic: Oxoacids
Replies: 4
Views: 209

Re: Oxoacids

I believe oxoacid is simply a type of strong acid because it is an acid with has at least one hydrogen atom bonded to oxygen
by Kalsuda Lapborisuth 1B
Sun Jun 10, 2018 9:16 pm
Forum: Identifying Acidic & Basic Salts
Topic: strong acid/base?
Replies: 3
Views: 260

Re: strong acid/base?

Another way to identify strong acid is to see the difference in electronegativity. If there is more difference in electronegativity, it will weaken the bond and make the acid stronger.
by Kalsuda Lapborisuth 1B
Sun Jun 10, 2018 8:40 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: acid plus base
Replies: 2
Views: 173

Re: acid plus base

I am not quite sure what you meant by your question but I think you still need to do calculations because the number of moles of H+ and OH- in the solution added by both the one base and one acid does not necessarily have to be equal.
by Kalsuda Lapborisuth 1B
Sun Jun 03, 2018 11:18 pm
Forum: Hybridization
Topic: Clarification
Replies: 4
Views: 222

Re: Clarification

I believe it simply says the concept applies to all types of molecue
by Kalsuda Lapborisuth 1B
Sun Jun 03, 2018 11:13 pm
Forum: Hybridization
Topic: Hybrid orbitals
Replies: 6
Views: 243

Re: Hybrid orbitals

Electrons are more likely going to be found in the bonding region. Logically, the amount of electron density region would be equal to the number of hybrid orbital.
by Kalsuda Lapborisuth 1B
Sun Jun 03, 2018 11:04 pm
Forum: Hybridization
Topic: Atomic orbitals vs hybrid orbitals
Replies: 2
Views: 129

Re: Atomic orbitals vs hybrid orbitals

I personally use the same method so I believe that they are correct. However, when I implement them I usually draw it out for clarity. Hope that helps!
by Kalsuda Lapborisuth 1B
Sun May 20, 2018 10:47 pm
Forum: Resonance Structures
Topic: Stability
Replies: 3
Views: 122

Re: Stability

Using the criteria given by the reply above, if you are not sure during the test you can draw out many structures to compare the formal charge for the sake of clarity also. Hope that also helps!
by Kalsuda Lapborisuth 1B
Sun May 20, 2018 10:39 pm
Forum: Octet Exceptions
Topic: Radicals [ENDORSED]
Replies: 6
Views: 359

Re: Radicals [ENDORSED]

This might be slightly out of topic but why is the fact that radical is highly reactive makes radicals harmful?
by Kalsuda Lapborisuth 1B
Sun May 20, 2018 10:36 pm
Forum: Octet Exceptions
Topic: Octet exceptions
Replies: 1
Views: 144

Octet exceptions

My TA mentioned that atoms from group 3 doesn't need to have an octet (to minimize formal charges). I am curious as to how the atoms from below period 3 in group 3 would behave? Would it violate the octet rule in the similar fashion to Al and B or in the similar fashion to P and S in the same period...
by Kalsuda Lapborisuth 1B
Sun May 13, 2018 9:20 pm
Forum: Lewis Structures
Topic: Cations and Anions
Replies: 3
Views: 137

Re: Cations and Anions

Dr.Lavelle mentioned in class that you don't have to show (with Lewis structures) which electrons were lost/gained and simply put the charge outside the brackets.
by Kalsuda Lapborisuth 1B
Sun May 13, 2018 9:18 pm
Forum: Lewis Structures
Topic: Octet rule
Replies: 1
Views: 62

Octet rule

Is there a guideline to an octet rule violation?
by Kalsuda Lapborisuth 1B
Sun May 13, 2018 9:17 pm
Forum: Lewis Structures
Topic: Lower formal charges
Replies: 2
Views: 72

Lower formal charges

I came across this an old course reader, saying "The lower the individual values of the formal charges the more stable the structure." Why is this the case?
by Kalsuda Lapborisuth 1B
Sun May 06, 2018 11:03 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius [ENDORSED]
Replies: 4
Views: 176

Re: Atomic Radius [ENDORSED]

I believe it is also due to the increase in electronegativity across the periodic table, which is drawing the electrons inwards.
by Kalsuda Lapborisuth 1B
Sun May 06, 2018 10:58 pm
Forum: Trends in The Periodic Table
Topic: Unicorn practice test 6d.
Replies: 3
Views: 164

Re: Unicorn practice test 6d.

In the way of filling orbitals, in accordance to the "half-shell rule", it is more stable to have one electron in each box than to have ,say, 4 in 3 boxes for p orbital. As a result, it takes less energy to take away an electron from O.
by Kalsuda Lapborisuth 1B
Sun May 06, 2018 10:37 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d before 4s
Replies: 9
Views: 291

Re: 3d before 4s

Is it also correct to say the same for 5s and 4d?
by Kalsuda Lapborisuth 1B
Sun Apr 29, 2018 11:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Short hand for test
Replies: 2
Views: 75

Short hand for test

I would like to confirm whether on the test we can use shorthand with the closest Nobel gas unless it was specified?
by Kalsuda Lapborisuth 1B
Sun Apr 29, 2018 11:30 pm
Forum: Quantum Numbers and The H-Atom
Topic: Atomic radius
Replies: 1
Views: 79

Atomic radius

This might be a slightly weird/off topic question but are we assuming that an atom has a spherical shape when we are finding an atomic radius? If so, why?
by Kalsuda Lapborisuth 1B
Sun Apr 29, 2018 11:26 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Explanation to the answer of the question 2.31
Replies: 4
Views: 135

Explanation to the answer of the question 2.31

The question asks "Which of the following subshells cannot exist in an atom: (a) 2d; (b) 4d; (c) 4g; (d) 6f?". I understand that a and c cannot exist but I am not sure about the explanation as to why b and d can exist.
by Kalsuda Lapborisuth 1B
Sun Apr 22, 2018 10:31 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Negative signs
Replies: 3
Views: 143

Negative signs

I am confused with the signs when I use Rydberg equation and conservation of energy. Could someone kindly clarify this please?
by Kalsuda Lapborisuth 1B
Sun Apr 22, 2018 10:22 pm
Forum: DeBroglie Equation
Topic: equations that apply to light only/everything else but light
Replies: 8
Views: 302

Re: equations that apply to light only/everything else but light

But if light has momentum as you said, wouldn't De Brogile's wave equation be applicable to photon also? I would like further clarification
on whether lambda=h/p applies to photon particles or not.
by Kalsuda Lapborisuth 1B
Sun Apr 22, 2018 10:09 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Question 1.44 from the textbook
Replies: 2
Views: 78

Question 1.44 from the textbook

I'm not sure how to approach this question. "What is the minimum uncertainty in the position of a hydrogen atom in a particle accelerator given that its speed is known to within +- 5.0 m s^-1?"
by Kalsuda Lapborisuth 1B
Tue Apr 10, 2018 11:49 am
Forum: Significant Figures
Topic: Scientific notation [ENDORSED]
Replies: 7
Views: 379

Scientific notation [ENDORSED]

Should we always answer in scientific notation? or simply maintaining sig figs is enough?
by Kalsuda Lapborisuth 1B
Tue Apr 10, 2018 11:43 am
Forum: Balancing Chemical Reactions
Topic: Fastest way to balance chemical equation
Replies: 9
Views: 1269

Fastest way to balance chemical equation

While I know that guess and check is usually the typical method to balancing equation, are there tips on points I should look out for or things I should do first to make balancing complex equation faster?
by Kalsuda Lapborisuth 1B
Mon Apr 09, 2018 6:29 pm
Forum: Properties of Light
Topic: Homework? [ENDORSED]
Replies: 10
Views: 370

Homework? [ENDORSED]

I'm not totally sure which questions are this week's homework?
by Kalsuda Lapborisuth 1B
Sun Apr 08, 2018 5:08 pm
Forum: Molarity, Solutions, Dilutions
Topic: G.23 from HW [ENDORSED]
Replies: 4
Views: 251

Re: G.23 from HW [ENDORSED]

Because when KCl and NaCl dissolves in water, they become K+and Cl- and Na+ and Cl- respectively, you can approach this problem by simply adding the moles of KCl and NaCl together to find the total molar concentration of Cl- in 100.0mL solution.
by Kalsuda Lapborisuth 1B
Sun Apr 08, 2018 4:59 pm
Forum: Balancing Chemical Reactions
Topic: Catalysts [ENDORSED]
Replies: 4
Views: 168

Re: Catalysts [ENDORSED]

I believe catalysts are usually noted above the arrows in chemical equations and not included in the reactants or products.
by Kalsuda Lapborisuth 1B
Sun Apr 08, 2018 4:54 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity formula
Replies: 6
Views: 254

Molarity formula

I understand the material so far but I wonder if there are situations/problems where the formula MiVi = MfVf cannot be used?

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