Search found 65 matches

by chari_maya 3B
Sun Jan 19, 2020 4:42 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to omit "x-term"
Replies: 6
Views: 22

Re: When to omit "x-term"

Why can we do this? I understand that the rule exists, but I'm wondering if someone can explain how a small K correlates to a negligible x.
by chari_maya 3B
Sun Jan 19, 2020 4:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5I.27
Replies: 8
Views: 30

Re: 5I.27

Can someone solve this whole problem? I keep doing it and coming up with the wrong answer.
by chari_maya 3B
Sun Jan 19, 2020 3:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.59
Replies: 2
Views: 251

Re: 11.59

Calculate Q first, which should produce a value of Q = 0.75. Because Q < Kc, the reaction proceeds in the forward direction, so reactants will lose concentration while products will gain concentration. Then do the ICE table and use quadratic equation to find Kc.
by chari_maya 3B
Sun Jan 19, 2020 3:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5.I.23
Replies: 2
Views: 9

5.I.23

In this problem: A reaction mixture consisting of 2.00 mol CO and 3.00 mol H2 is placed in a reaction vessel of volume 10.0 L and heated to 1200. K. At equilibrium, 0.478 mol CH4 was present in the system. Determine the value of Kc for the reaction CO(g) 1 3 H2(g) ∆ CH4(g) 1 H2O(g) at 1200. K. would...
by chari_maya 3B
Sat Jan 18, 2020 6:55 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: HW Q 6th ed. 11.53
Replies: 3
Views: 45

Re: HW Q 6th ed. 11.53

Why would you not convert to P and calculate Kp?
by chari_maya 3B
Sun Jan 12, 2020 9:03 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Concentration
Replies: 5
Views: 12

Concentration

does a change in concentration cause Kc to change?
by chari_maya 3B
Sun Jan 12, 2020 8:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Concentrations and the K value.
Replies: 7
Views: 27

Re: Concentrations and the K value.

So is this why when the amount of reactant is increased, K remains the same for the reaction?
by chari_maya 3B
Sun Jan 12, 2020 5:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to use Kc vs Kp
Replies: 7
Views: 24

Re: When to use Kc vs Kp

what would happen if the reactant(s) and/or products are different states?
by chari_maya 3B
Sun Jan 12, 2020 5:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Finding K: liquids and aqueous
Replies: 7
Views: 27

Re: Finding K: liquids and aqueous

Is this the same case for solids?
by chari_maya 3B
Sun Jan 12, 2020 5:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Different types of K
Replies: 9
Views: 24

Re: Different types of K

How do you convert from Kc to Kp?
by chari_maya 3B
Sat Dec 07, 2019 10:55 pm
Forum: Lewis Acids & Bases
Topic: Lewis vs Bronsted
Replies: 7
Views: 48

Re: Lewis vs Bronsted

Is a lewis acid/base always a bronsted acid and vice-versa?
by chari_maya 3B
Wed Dec 04, 2019 1:51 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Stronger Acid 6C.21
Replies: 3
Views: 33

Re: Stronger Acid 6C.21

how does the Ch3 contribute electron density towards the O-H bond?
by chari_maya 3B
Wed Dec 04, 2019 1:43 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Application of Electronegativity to Acid Strength
Replies: 3
Views: 467

Re: Application of Electronegativity to Acid Strength

^I am also wondering this... I saw another question asking whether HClO or HCLO2 is a stronger acid, I thought it was HCLO2 because more oxygen atoms are attached to the central atom, but the answer was HClO2 because ClO2- is more stable.
by chari_maya 3B
Tue Dec 03, 2019 10:06 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7743
Views: 1060849

Re: Post All Chemistry Jokes Here

Little Billy was a chemist
Little Billy is no more
What he thought was H2O
was really H2SO4!
by chari_maya 3B
Tue Dec 03, 2019 8:44 pm
Forum: Coordinate Covalent Bonds
Topic: chelating ligands
Replies: 1
Views: 26

chelating ligands

How do you draw diethylenetriammine chelating?
by chari_maya 3B
Tue Dec 03, 2019 8:43 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: chelating ligands [ENDORSED]
Replies: 21
Views: 1533

Re: chelating ligands [ENDORSED]

How do you draw diethylenetriammine chelating?
by chari_maya 3B
Tue Dec 03, 2019 12:50 pm
Forum: Biological Examples
Topic: cisplatin
Replies: 5
Views: 85

Re: cisplatin

How do the Cl atoms attach to the DNA?
by chari_maya 3B
Sun Dec 01, 2019 5:46 pm
Forum: Lewis Acids & Bases
Topic: 6A.13
Replies: 7
Views: 34

Re: 6A.13

What would H- be considered?
by chari_maya 3B
Sun Dec 01, 2019 4:11 pm
Forum: Bronsted Acids & Bases
Topic: J9
Replies: 3
Views: 69

Re: J9

is the answer to part a CH3COOK?
by chari_maya 3B
Sun Dec 01, 2019 3:53 pm
Forum: Bronsted Acids & Bases
Topic: J.7
Replies: 8
Views: 70

Re: J.7

I don't understand part b... I know that N is more electronegative than Zn so Zn(OH) must be the bronsted base, but I don't understand why it is Zn(OH)2.
by chari_maya 3B
Sun Dec 01, 2019 3:18 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid Strength
Replies: 6
Views: 37

Re: Acid Strength

Why does losing one hydrogen make H22So4 a weaker acid?
by chari_maya 3B
Sun Dec 01, 2019 3:07 pm
Forum: Lewis Acids & Bases
Topic: Define Acid and Base
Replies: 7
Views: 44

Re: Define Acid and Base

If sodium metal produces OH- ions when it reacts with water, why is it not considered a base?
by chari_maya 3B
Sat Nov 30, 2019 10:09 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate covalent bonds
Replies: 4
Views: 30

Re: Coordinate covalent bonds

In carbon monoxide, is one of the bonds a coordinate covalent bond? I read somewhere that it was but there is no transition metal involved.
by chari_maya 3B
Sat Nov 30, 2019 10:01 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination compound
Replies: 5
Views: 41

Re: Coordination compound

What is the difference between a complex ion and a coordination compound?
by chari_maya 3B
Sun Nov 24, 2019 4:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Octahedral
Replies: 2
Views: 25

Re: Octahedral

Right but the book says that the most common complexes have a coordination number of 6, why is that?
by chari_maya 3B
Sun Nov 24, 2019 4:21 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Substitution reaction
Replies: 1
Views: 7

Substitution reaction

what is a substitution reaction and under what conditions does it take place?
by chari_maya 3B
Sun Nov 24, 2019 4:16 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Transition Metals
Replies: 3
Views: 26

Re: Transition Metals

Does it also have something to do with the variable valencies of transition metals and flexibility in oxidation states?
by chari_maya 3B
Sun Nov 24, 2019 4:01 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand
Replies: 4
Views: 22

Re: Ligand

From what I understand a Ligand is a lewis base that forms at least one coordinate covalent bond with the central atom which is generally a d block element.
by chari_maya 3B
Mon Nov 18, 2019 6:28 pm
Forum: Hybridization
Topic: hybridization
Replies: 4
Views: 23

Re: hybridization

Why are terminal atoms not regarded as hybridized?
by chari_maya 3B
Sun Nov 17, 2019 2:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 5
Views: 35

Re: Lone Pairs

Also, how can you predict whether a lone pair will be axial or equatorial?
by chari_maya 3B
Sun Nov 17, 2019 2:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 5
Views: 35

Re: Lone Pairs

Why are lone pairs important in identifying shape when only the position of atoms are considered when naming the shape?
by chari_maya 3B
Sun Nov 17, 2019 1:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 6
Views: 35

Re: VSEPR

Why are different strength bonds treated the same when applying VSEPR?
by chari_maya 3B
Sun Nov 17, 2019 1:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: regions of electron density
Replies: 10
Views: 44

Re: regions of electron density

Why is knowing the number of regions of electron density necessary when naming a molecule?
by chari_maya 3B
Mon Nov 11, 2019 8:58 pm
Forum: Dipole Moments
Topic: Textbook question 3F.1
Replies: 5
Views: 40

Re: Textbook question 3F.1

I am also confused about this
by chari_maya 3B
Sat Nov 02, 2019 10:30 pm
Forum: Lewis Structures
Topic: 2.B.11
Replies: 2
Views: 19

2.B.11

How is the lewis structure for H2C(NH2)COOH determined?
by chari_maya 3B
Sat Nov 02, 2019 10:18 pm
Forum: Lewis Structures
Topic: 2B. 9
Replies: 3
Views: 26

Re: 2B. 9

How do you do part a, with ammonium chloride ?
by chari_maya 3B
Sat Nov 02, 2019 10:16 pm
Forum: Lewis Structures
Topic: Midterm Topics
Replies: 8
Views: 48

Re: Midterm Topics

Will we have to know how to draw the lewis structure of a molecule given only the name of the molecule?
by chari_maya 3B
Sat Nov 02, 2019 10:03 pm
Forum: Lewis Structures
Topic: 2B. 3 part d
Replies: 4
Views: 25

Re: 2B. 3 part d

Why can Br have 10 electrons, instead of 8?
by chari_maya 3B
Sat Nov 02, 2019 9:41 pm
Forum: Lewis Structures
Topic: Resonance Hybrids
Replies: 3
Views: 26

Re: Resonance Hybrids

Can someone explain delocalized electrons?
by chari_maya 3B
Sat Nov 02, 2019 9:33 pm
Forum: Lewis Structures
Topic: drawing lewis structures
Replies: 5
Views: 50

Re: drawing lewis structures

Why is the atom at the center of a lewis structure the one with the lowest ionization energy?
by chari_maya 3B
Sun Oct 27, 2019 4:30 pm
Forum: Ionic & Covalent Bonds
Topic: 2A.23
Replies: 5
Views: 43

Re: 2A.23

Why is part C AlH3?
by chari_maya 3B
Sun Oct 27, 2019 3:31 pm
Forum: Ionic & Covalent Bonds
Topic: Lattice Energy
Replies: 2
Views: 46

Lattice Energy

Can someone explain why the difference between a compound of widely separated gases and tightly compacted ones is so drastically different?
by chari_maya 3B
Sun Oct 27, 2019 3:19 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Block Confusion
Replies: 4
Views: 43

Re: Block Confusion

Why does gallium form Ga 3+ with the configuration [Ar]3d10?
by chari_maya 3B
Sun Oct 27, 2019 3:07 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Noble gas electron configurations
Replies: 3
Views: 25

Noble gas electron configurations

according the textbook, when sodium loses an electron (Na) - (Na +), the result has an electron configuration similar to neon, which is 1s1, 2s2, 2p6. Why does neon have this configuration, with only 1 electron in the 1s subshell?
by chari_maya 3B
Fri Oct 25, 2019 8:20 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 5
Views: 43

Re: Electron Configurations

In what scenario would a valence configuration be used over an electron configuration?
by chari_maya 3B
Fri Oct 25, 2019 8:15 pm
Forum: Quantum Numbers and The H-Atom
Topic: Homework Question. 2.51 [ENDORSED]
Replies: 4
Views: 2350

Re: Homework Question. 2.51 [ENDORSED]

How do you draw an aufbau structure?
by chari_maya 3B
Fri Oct 25, 2019 8:04 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 1E. 21
Replies: 1
Views: 20

1E. 21

Can someone help me with this problem?
Predict the number of valence electrons present in each of the following atoms (include the outermost d-electrons): (a) Ta; (b) Tc; (c) Te; (d) Tl.
by chari_maya 3B
Sun Oct 20, 2019 4:14 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 9
Views: 52

Re: Quantum Numbers

why are higher orbitals (g-,h- etc) not used by chemists in practice?
by chari_maya 3B
Sun Oct 20, 2019 3:55 pm
Forum: *Shrodinger Equation
Topic: Wave functions
Replies: 9
Views: 66

Re: Wave functions

what is the relationship between wave functions and orbital shapes?
by chari_maya 3B
Sun Oct 20, 2019 3:46 pm
Forum: *Shrodinger Equation
Topic: Schrodinger Equation
Replies: 3
Views: 42

Re: Schrodinger Equation

I don't really understand, conceptually, how the Schrodinger Equation was derived and proven. Can someone explain?
by chari_maya 3B
Sun Oct 20, 2019 3:39 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: 1.B.25
Replies: 1
Views: 23

1.B.25

Question 1.B.25 asks " What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350. pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom."

What does it mean by model the atom as a one-dimensional box?
by chari_maya 3B
Sun Oct 20, 2019 3:31 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: 1.B #27
Replies: 4
Views: 28

Re: 1.B #27

Wouldn't the total uncertainty be 10 m/s, because the uncertainty is 5.00 m/s +/- 5.0 m/s?
by chari_maya 3B
Sun Oct 13, 2019 3:31 pm
Forum: Properties of Light
Topic: problem 1A.15
Replies: 4
Views: 37

Re: problem 1A.15

How would you do this problem if the Lyman series did not apply?
by chari_maya 3B
Sun Oct 13, 2019 3:11 pm
Forum: Properties of Light
Topic: problem 1A.15
Replies: 4
Views: 37

Re: problem 1A.15

Can you explain the reason we know the correlation between UV light and the fact that n1 = 1?
by chari_maya 3B
Sat Oct 12, 2019 4:14 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 3
Views: 47

Re: Photoelectric Effect

If that is true ( if excess energy is used to emit electrons and since the electrons are moving, the excess energy is basically manifested as the kinetic energy of the electron) then what would be the kinetic energy when the threshold energy is met exactly?
by chari_maya 3B
Sat Oct 12, 2019 4:05 pm
Forum: Photoelectric Effect
Topic: Planck's Constant
Replies: 4
Views: 64

Re: Planck's Constant

How was the actual value of Planck's constant derived?
by chari_maya 3B
Sat Oct 12, 2019 3:55 pm
Forum: Properties of Light
Topic: Light Intensity
Replies: 6
Views: 28

Re: Light Intensity

One thinking point in the texbook asked why ultraviolet radiation is much more harmful to living tissue than infared radiation... I was wondnerinf if someone could explain the answer.
by chari_maya 3B
Thu Oct 10, 2019 8:32 pm
Forum: Properties of Light
Topic: Waves/Particles
Replies: 14
Views: 122

Re: Waves/Particles

In the homework, the first question asked how the fact that if an object is placed in an electron's path it casts a shadow, supports electron behavior as similar to that of radiation. This got me wondering what a shadow is and how the casting of a shadow works.
by chari_maya 3B
Sun Oct 06, 2019 1:11 pm
Forum: Limiting Reactant Calculations
Topic: M.9 Question
Replies: 1
Views: 23

M.9 Question

Question M.9 asks for the net ionic equation of the reaction. I was wondering if someone could explain to me what that means and how it is different from a molecular equation.
by chari_maya 3B
Thu Oct 03, 2019 11:28 pm
Forum: Significant Figures
Topic: No numbers in problem?
Replies: 3
Views: 56

Re: No numbers in problem?

In high school we were told to use 2 sig figs if there was any uncertainty.
by chari_maya 3B
Thu Oct 03, 2019 11:26 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Lab experiments- accuracy vs precision
Replies: 7
Views: 84

Re: Lab experiments- accuracy vs precision

In labs that I have done in the past, I have had trouble mitigating and solving errors. I was wondering if anyone has any advice on how to identify sources of error in a controlled experiment and how to suggest mitigation. I know that it is unwise to attribute anything to human error, so I was hopin...
by chari_maya 3B
Thu Oct 03, 2019 11:23 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Calculations Post-Module Assessment
Replies: 3
Views: 49

Re: Limiting Reactant Calculations Post-Module Assessment

Is it possible in a problem like this or any problem where limiting reactant is determined to not convert to moles, and instead keep everything in terms of percent mass, keeping in mind the law of conservation of mass?
by chari_maya 3B
Thu Oct 03, 2019 11:20 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Aqueous, solid, gas
Replies: 11
Views: 117

Re: Aqueous, solid, gas

Why does knowing whether the element/compound is Aqueous/solid/gas matter when writing out the balanced chemical equation?
by chari_maya 3B
Thu Oct 03, 2019 11:17 pm
Forum: Molarity, Solutions, Dilutions
Topic: Volume formulas
Replies: 6
Views: 68

Re: Volume formulas

I am also confused about this... on page F57 of the textbook in the box called G1 there is a description on how to calculate the volume of stock solution required for a given dilution... it seems like v = n/c is used when you have/ have found the amount of solute in the final solution and want to fi...
by chari_maya 3B
Thu Oct 03, 2019 11:08 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 168
Views: 102430

Re: Rusty on High School Chem [ENDORSED]

I'm not sure if this was mentioned... when doing the first homework I was feeling rusty concerning writing the chemical formula for molecules given their name written out... I found a good website that covers naming compounds etc.
http://www.kentchemistry.com/links/nami ... riting.htm

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