Search found 61 matches

by AKatukota
Mon Jan 13, 2020 6:27 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Thermodynamic Stability
Replies: 5
Views: 21

Re: Thermodynamic Stability

It will be more thermodynamically stable if it has a smaller K.
by AKatukota
Mon Jan 13, 2020 6:26 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction Quotient
Replies: 11
Views: 24

Re: Reaction Quotient

The reaction quotient , Q, is pretty much used and compared to K to determine the direction the reaction will proceed in. If Q<K, then products favored. If Q>K then the reactants favored.
by AKatukota
Mon Jan 13, 2020 6:25 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier's Principle
Replies: 5
Views: 17

Re: Le Chatelier's Principle

SO basically when a stress is applied to a system, the system will counteract those changes by favoring either the reverse or forward reaction.
by AKatukota
Mon Jan 13, 2020 6:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6A.21
Replies: 1
Views: 15

6A.21

How would we do part b? Im confused on the different temperature. DO the same rules apply?
by AKatukota
Mon Jan 13, 2020 6:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6B.3
Replies: 2
Views: 16

6B.3

Would someone be able to help me with 6B.3? How are we supposed to incorporate the different volumes to get pH?
by AKatukota
Tue Jan 07, 2020 8:04 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Effect of High Initial Concentration of Reactant
Replies: 5
Views: 32

Re: Effect of High Initial Concentration of Reactant

Yes if there is a higher concentration of reactants, then products will be favored according to Le Chatlier's Principle.
by AKatukota
Tue Jan 07, 2020 8:03 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5I.11
Replies: 3
Views: 23

Re: 5I.11

mmol is millimole so you would convert that into moles and then for concentration divided by liters.
by AKatukota
Tue Jan 07, 2020 8:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Q vs K
Replies: 13
Views: 75

Re: Q vs K

Q refers to the direction that the reaction will proceed in. You use Q in comparison to K. For example, if Q<K, then the reaction favors reactant production. If Q>K then it favors products. If Q=K, then the reaction is at equilibrium.
by AKatukota
Tue Jan 07, 2020 8:01 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Expression for K
Replies: 4
Views: 25

Re: Expression for K

You would put P in front when there are gases involved in the reaction.
by AKatukota
Tue Jan 07, 2020 4:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5I.11
Replies: 3
Views: 23

5I.11

For this homework problem, what are we supposed to do when the amounts are given in mmol to find the reaction quotient, Q?
by AKatukota
Tue Jan 07, 2020 4:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5G.11
Replies: 3
Views: 31

5G.11

For this question, what do we do when there is a solid or liquid in the reaction? What if there is (aq)? I remember him saying something becomes 1.
by AKatukota
Thu Dec 05, 2019 3:47 pm
Forum: Hybridization
Topic: hybridization
Replies: 3
Views: 29

Re: hybridization

Merging of two atomic orbitals means that the orbitals overlap. So the greater the extent of the orbital overlap, the stronger the bond. A mixing of s, px, py, pz orbitals would create four hybridized orbitals = tetrahedral sp3.
by AKatukota
Thu Dec 05, 2019 3:45 pm
Forum: Hybridization
Topic: Hybridization of N2
Replies: 3
Views: 15209

Re: Hybridization of N2

How would you draw the hybridization orbitals for N2 to show the 2 pi bonds?
by AKatukota
Tue Dec 03, 2019 11:22 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B.9
Replies: 5
Views: 37

Re: 6B.9

I had a question on this too. In the textbook solutions, it says that the answer for (ii) is 1.50M for [OH-], the pH = 13.824, and the pOH = 0.176?
by AKatukota
Tue Dec 03, 2019 11:19 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Which is the stronger acid?
Replies: 3
Views: 32

Which is the stronger acid?

For HClO vs HClO2, how would you reason that HClO2 is the stronger acid? In the textbook it said it was based on the greater number of O atoms in HClO2, but why?

Thank you!
by AKatukota
Tue Dec 03, 2019 11:17 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Stronger Acid 6C.21
Replies: 3
Views: 33

Stronger Acid 6C.21

How do you know that formic acid is stronger than acetic acid? What would be the reasoning?
by AKatukota
Mon Dec 02, 2019 10:10 pm
Forum: Lewis Acids & Bases
Topic: Acids and Bases 6A.13
Replies: 2
Views: 31

Acids and Bases 6A.13

For 6A.13, how would you know if the ion is an acid or base?

For example, for F- and H-, how do you know F- is a Lewis base and H- is a Lewis base?
And why would BF3 be a Lewis acid?
by AKatukota
Tue Nov 26, 2019 9:12 pm
Forum: Naming
Topic: Writing the formula given the compound
Replies: 4
Views: 539

Re: Writing the formula given the compound

Ok got it thanks!
by AKatukota
Tue Nov 26, 2019 9:04 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.37 Determine coordination number
Replies: 4
Views: 819

Re: 17.37 Determine coordination number

This really helped thanks! For EDTA do we just memorize that it is 6 as per the example in class? What would be the formula for it? Thanks.
by AKatukota
Tue Nov 26, 2019 8:06 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelate
Replies: 3
Views: 19

Re: Chelate

A chelate is basically just a complex containing one or more ligands that forma ring of atoms including the central metal atom.

Chelate formation lies behind the body's strategy of producing fever when infected by bacteria for example.
by AKatukota
Tue Nov 26, 2019 8:04 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 9C.5
Replies: 1
Views: 22

9C.5

Which of the following ligands can be polydentate? If the ligand can be polydentate, give the maximum number of places on the ligand that can bind simultaneously to a single metal center: (a) HN(CH2CH2NH2)2; (b) CO322; (c) H2O; (d) oxalate. For this question, how exactly do you know if a ligand is p...
by AKatukota
Tue Nov 26, 2019 7:59 pm
Forum: Naming
Topic: Homework Problem 16.29 Part D
Replies: 5
Views: 648

Re: Homework Problem 16.29 Part D

So it is always the neutral atom first got it thank you! Also, for this same question why would there be a bis there?
by AKatukota
Tue Nov 26, 2019 7:56 pm
Forum: Naming
Topic: Writing the formula given the compound
Replies: 4
Views: 539

Re: Writing the formula given the compound

When would you put an overall charge on the coordination compound?
by AKatukota
Thu Nov 14, 2019 10:15 pm
Forum: General Science Questions
Topic: Midterm
Replies: 7
Views: 70

Re: Midterm

Great!
by AKatukota
Thu Nov 14, 2019 10:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 11
Views: 78

Re: Test 2

It should be on everything after the midterm up to Friday's lecture. So studying all the lecture notes and homework problems would be beneficial.
by AKatukota
Thu Nov 14, 2019 10:12 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: hw problem 2D.11
Replies: 2
Views: 32

Re: hw problem 2D.11

Thanks this helped me as well!
by AKatukota
Thu Nov 14, 2019 10:12 pm
Forum: Dipole Moments
Topic: Dipole Moment to figure out polarity
Replies: 3
Views: 21

Re: Dipole Moment to figure out polarity

Thank you this was helpful!
by AKatukota
Thu Nov 14, 2019 10:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E21
Replies: 2
Views: 23

Re: 2E21

Thank you!
by AKatukota
Thu Nov 14, 2019 10:10 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 17
Views: 316

Re: Pi and Sigma Bonds

I think it's good to know!
by AKatukota
Thu Nov 14, 2019 10:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures & VSEPR
Replies: 9
Views: 43

Re: Lewis Structures & VSEPR

Drawing the lewis structure is helpful, but it is not required.
by AKatukota
Thu Nov 14, 2019 10:08 pm
Forum: Dipole Moments
Topic: Test 2
Replies: 3
Views: 35

Re: Test 2

It should be on all material covered after the midterm.
by AKatukota
Thu Nov 14, 2019 10:06 pm
Forum: Dipole Moments
Topic: 3f.1
Replies: 3
Views: 27

Re: 3f.1

dipole moments are based on partial positive and negative ends of a molecule. You can determine through the electronegativity differences in the molecule. Since O is more electronegative than S, O has a partial negative charge and S has a partial positive charge. There is a dipole moment within the ...
by AKatukota
Thu Nov 14, 2019 10:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape Name
Replies: 17
Views: 115

Re: Molecular Shape Name

It is helpful to remember the shape names as well as bond angles.
by AKatukota
Mon Oct 28, 2019 2:15 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Multi-electron atoms
Replies: 6
Views: 35

Re: Multi-electron atoms

Ok, makes sense!
by AKatukota
Mon Oct 28, 2019 2:12 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge equation?
Replies: 5
Views: 42

Re: Formal Charge equation?

The formal charge equation we were taught is

FC = V - (L + S/2)
where
FC = formal charge
V = valence e-
L = Long pair e-
S = shared e-
by AKatukota
Mon Oct 28, 2019 2:11 pm
Forum: Ionic & Covalent Bonds
Topic: likely charge of atoms
Replies: 3
Views: 20

Re: likely charge of atoms

This helped thank you!
by AKatukota
Mon Oct 28, 2019 2:08 pm
Forum: Lewis Structures
Topic: Expanded Valence Shells
Replies: 3
Views: 38

Re: Expanded Valence Shells

Expanded valence shells means that the element can accommodate more than 8 valence electrons (i.e P, S, Cl)
This is because atoms in Period 3 or higher have d-orbitals in valence shell that accommodate additional electrons.

The octet guideline : 8e- --> s^2 p^6
by AKatukota
Mon Oct 28, 2019 2:06 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 3
Views: 27

Re: Resonance

Resonance is basically the blending of structures. It is multiple bonds that can be in different locations. Electrons involved in resonance structures are delocalized. For example, Benzene, C6H6, has 3 localized double bonds (2 possible structures).
by AKatukota
Tue Oct 22, 2019 12:23 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbital
Replies: 3
Views: 40

Re: d orbital

Hi! Yes so the two exceptions are Cu and Cr. So in these cases the s level is actually higher than the d. So for Cu, the configuration would be [Ar] 4s^2 3d^9. However, it must be rewritten in numerical order: [Ar] 3d^9 4s^2. Now if we were to write the configuration of Cu^2+, the two electrons must...
by AKatukota
Tue Oct 22, 2019 12:18 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: example in class
Replies: 6
Views: 45

Re: example in class

Basically it is subscript x because since l=1, ml can = -1,0,1. Since they are specifying that ml=-1 that gives you the subscript x. If ml=0, the subscript would be y. If ml=1, the subscript would be z.
by AKatukota
Tue Oct 22, 2019 12:16 pm
Forum: Trends in The Periodic Table
Topic: Ionic Radii
Replies: 10
Views: 70

Re: Ionic Radii

Anions gained an electron, therefore the radius is larger than that of the parent atom. If an atom loses an electron, it is a cation, and has a smaller radius. Hope this helps! :)
by AKatukota
Tue Oct 22, 2019 12:12 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals 1D.19
Replies: 3
Views: 57

Orbitals 1D.19

1D.19 How many orbitals are present in the (a) 4p-subshell; (b) 3d-subshell; (c) 1s-subshell; (d) 4f-subshell of an atom?

How would I go about doing this?
by AKatukota
Tue Oct 22, 2019 11:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 5
Views: 36

Orbitals

When n=6, why are the possible values for l = 0,1,2,3,4,5,6? I thought it would just be 0-5, since it's n-1? I am trying to answer all parts of this question: (a) How many values of the quantum number l are possible when n = 6? (b) How many values of ml are allowed for an electron in a 5f-subshell? ...
by AKatukota
Tue Oct 22, 2019 11:51 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals / Quantum Numbers
Replies: 3
Views: 23

Orbitals / Quantum Numbers

How do we know that for orbital 6p for example, that the principle and angular momentum quantum numbers are n=6 and l = 1? I know that for l, the quantum numbers can be 0,1,2,3,4,5 right, but for orbital 6p, how is it just l=1?
by AKatukota
Tue Oct 15, 2019 2:36 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: What does "l" mean?
Replies: 2
Views: 46

Re: What does "l" mean?

Thank you! This question really helped me as well.
by AKatukota
Tue Oct 15, 2019 2:35 pm
Forum: Properties of Electrons
Topic: Using masses of protons, neutrons, and electrons
Replies: 7
Views: 71

Re: Using masses of protons, neutrons, and electrons

It seems that we would probably be given these values or they would be found on some sort of reference table. But it also would not be a bad idea to know their general values.
by AKatukota
Tue Oct 15, 2019 2:34 pm
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation
Replies: 8
Views: 69

Re: Schrodinger's Equation

Yeah I am unsure about when this equation would be used or calculations associated with it?
by AKatukota
Tue Oct 15, 2019 2:33 pm
Forum: Einstein Equation
Topic: Meaning of h [ENDORSED]
Replies: 5
Views: 56

Re: Meaning of h [ENDORSED]

h represents Plank's constant. So when you graph E vs the frequency of light, the slope of that line is Planck's constant.
by AKatukota
Tue Oct 15, 2019 2:29 pm
Forum: DeBroglie Equation
Topic: De Broglie Wavelength
Replies: 7
Views: 46

Re: De Broglie Wavelength

So when it asks for the De Broglie Wavelength, you would find the wavelength through h=mvl or l = h/mv
by AKatukota
Wed Oct 09, 2019 10:19 pm
Forum: Properties of Light
Topic: Work Function
Replies: 3
Views: 25

Re: Work Function

Work function is basically the energy required to remove an electron from the metal surface. If the energy of the photon is not greater than or equal to the energy to remove an electron (work function), then no electrons will be emitted.
by AKatukota
Wed Oct 09, 2019 10:18 pm
Forum: Photoelectric Effect
Topic: Energy of Photon = Work Function
Replies: 4
Views: 55

Re: Energy of Photon = Work Function

Unless the E(Photon) is greater than or equal to the E(Energy to remove an electron), an electron will not be emitted even for HIGH INTENSITY light, which was quite unexpected in the photoelectric effect experiment. Light sources with long wavelength (low frequency) light does not eject electrons ev...
by AKatukota
Wed Oct 09, 2019 10:15 pm
Forum: Properties of Light
Topic: Planck's constant
Replies: 2
Views: 34

Re: Planck's constant

So when plotting the frequency of light vs Energy, the slope of that line produces the proportionality constant, or Planck's constant. Energy is proportional to hv.
by AKatukota
Wed Oct 09, 2019 10:13 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Homework Problem A11
Replies: 4
Views: 43

Re: Homework Problem A11

For the Lyman series, the lower energy level is n=1. For the Balmer series it is n=2.
by AKatukota
Wed Oct 09, 2019 10:11 pm
Forum: Quantum Numbers and The H-Atom
Topic: Frequency
Replies: 15
Views: 139

Re: Frequency

Frequency is proportional to the Energy. So, as the frequency (Hz) increases, so does the Energy (J).
by AKatukota
Tue Oct 01, 2019 10:31 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Units
Replies: 3
Views: 56

Re: Problem E. 25

So formula units just means atoms?
by AKatukota
Tue Oct 01, 2019 10:29 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Practice Problem E.1
Replies: 6
Views: 49

Re: Practice Problem E.1

Usually it is better to convert back to meters.
by AKatukota
Tue Oct 01, 2019 10:25 pm
Forum: Molarity, Solutions, Dilutions
Topic: Mixtures and Solutions G.21
Replies: 2
Views: 29

Re: Mixtures and Solutions G.21

Great, thank you! And then I would divide by the 0.5L correct? I got .0458M potassium ions and .009M sulfide ions.
by AKatukota
Tue Oct 01, 2019 10:12 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Balancing Equations [ENDORSED]
Replies: 25
Views: 455

Re: Balancing Equations [ENDORSED]

All stoichiometric coefficients must be the lowest whole number, and multiplying by 2 would give the lowest whole number coefficients for that equation!
by AKatukota
Tue Oct 01, 2019 10:11 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Practice Problem E.1
Replies: 6
Views: 49

Re: Practice Problem E.1

You would get Avogadro's number, which is 6.022x10^23 atoms / mol then multiply by 288 ppm (which is the diameter), and then convert back to meters by dividing by 10^12 pm.
by AKatukota
Tue Oct 01, 2019 10:08 pm
Forum: Limiting Reactant Calculations
Topic: 2 Limiting Reactants
Replies: 9
Views: 63

Re: 2 Limiting Reactants

I don't believe that there can be more than one limiting reactant. In a reaction, there is ONE limiting reaction and the others are in excess. Once the limiting reactant is used up, the reaction can no longer occur, because the amount of product being produced is limited.
by AKatukota
Tue Oct 01, 2019 10:04 pm
Forum: Molarity, Solutions, Dilutions
Topic: Mixtures and Solutions G.21
Replies: 2
Views: 29

Mixtures and Solutions G.21

How would I start this problem?

A solution is prepared by dissolving 0.500 g of KCl, 0.500 g of K2S, and 0.500 g of K3PO4 in 500. mL of water. What is the concentration in the final solution of (a) potassium ions; (b) sulfide ions?

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