## Search found 66 matches

Sun Jan 24, 2021 11:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Clarification for Sampling #7
Replies: 10
Views: 21

### Re: Clarification for Sampling #7

Yes, you have to calculate the Kb value from Ka in this problem, because your are finding the pH of a weak base.
Sun Jan 24, 2021 11:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ka and Kb Formula
Replies: 15
Views: 35

### Re: Ka and Kb Formula

This is true for monoprotic acids.
Sun Jan 24, 2021 11:37 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Number 5
Replies: 18
Views: 62

### Re: Sapling Number 5

Find the initial B value by adding the values of BH+ and B at equilibrium.
Sun Jan 24, 2021 11:36 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Strong Acids/Bases
Replies: 12
Views: 36

### Re: Strong Acids/Bases

Make a song.
Sun Jan 24, 2021 11:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to use ICE box
Replies: 23
Views: 53

### Re: When to use ICE box

Use ICE boxes to find unknown concentrations when given the concentration of another substances.
Sun Jan 17, 2021 10:49 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q > K, Q< K
Replies: 25
Views: 75

### Re: Q > K, Q< K

When Q > K, the reaction shifts towards reactants, and when Q < K, the reactions shifts towards products.
Sun Jan 17, 2021 10:48 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q and K
Replies: 46
Views: 159

### Re: Q and K

K is just Q at equilibrium.
Sun Jan 17, 2021 10:46 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Box
Replies: 28
Views: 74

### Re: ICE Box

ICE boxes are usually just used for weak acids and bases.
Sun Jan 17, 2021 10:45 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Getting two positive x values when using quadratic
Replies: 43
Views: 160

### Re: Getting two positive x values when using quadratic

Test both and usually only one will work.
Sun Jan 17, 2021 10:44 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q vs k
Replies: 62
Views: 163

### Re: q vs k

Q will equal K at equilibrium.
Sun Jan 10, 2021 8:03 pm
Forum: Ideal Gases
Topic: Units of Temperature
Replies: 82
Views: 288

### Re: Units of Temperature

Temperature should be in Kelvin in this instance.
Sun Jan 10, 2021 8:02 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Water
Replies: 28
Views: 100

### Re: Water

Only include water when it is a gas, not solid or liquid.
Sun Jan 10, 2021 8:01 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 109
Views: 940

### Re: Kc vs Kp

Kc is used when given concentration, and Kp is used when given partial pressures.
Sun Jan 10, 2021 8:00 pm
Forum: Ideal Gases
Topic: reversing reactions
Replies: 83
Views: 402

### Re: reversing reactions

When a reaction is reversed, K becomes 1/K.
Sun Jan 10, 2021 7:59 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 74
Views: 451

### Re: PV=nRT

P is pressure, V is volume, n is number of gaseous moles, R is the gas constant, T is temperature in Kelvin.
Thu Dec 17, 2020 12:35 am
Forum: Conjugate Acids & Bases
Topic: Alkaline
Replies: 15
Views: 89

### Re: Alkaline

Yes, alkaline means basic.
Thu Dec 17, 2020 12:33 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating H+
Replies: 17
Views: 47

### Re: Calculating H+

Use the equation H+= 10^pH.
Thu Dec 17, 2020 12:32 am
Forum: Lewis Acids & Bases
Topic: Water
Replies: 62
Views: 492

### Re: Water

It is amphoteric.
Thu Dec 17, 2020 12:32 am
Forum: Lewis Acids & Bases
Topic: Water
Replies: 62
Views: 492

### Re: Water

Water can act as both.
Thu Dec 17, 2020 12:31 am
Forum: Air Pollution & Acid Rain
Topic: Acid Rain
Replies: 23
Views: 1634

### Re: Acid Rain

When water reacts with pollutants it becomes acidic.
Sun Dec 06, 2020 11:38 pm
Forum: Naming
Topic: "(en)" Sapling
Replies: 19
Views: 116

### Re: "(en)" Sapling

It stands for ethylenediamine, which is a bidentate ligand.
Sun Dec 06, 2020 11:35 pm
Forum: Naming
Topic: Sapling 1
Replies: 34
Views: 166

### Re: Sapling 1

Make sure you exclude the prefix when arranging in alphabetical order.
Sun Dec 06, 2020 11:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Prefixes
Replies: 9
Views: 62

### Re: Prefixes

Studying the ligand chart could be helpful.
Sun Dec 06, 2020 11:33 pm
Forum: Naming
Topic: Order of Ligands/naming
Replies: 28
Views: 141

### Re: Order of Ligands/naming

It goes in alphabetical order, without prefixes.
Sun Dec 06, 2020 11:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 13
Views: 93

### Re: Coordination Number

The coordination number of a metal ion is the number of bonds it has with ligands.
Sun Nov 29, 2020 11:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Equatorial/ Axial Planes
Replies: 14
Views: 75

### Re: Equatorial/ Axial Planes

Equatorial planes are horizontal (like the Earth's equator) and axial planes are vertical (like the Earth's axis).
Sun Nov 29, 2020 11:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape Names
Replies: 50
Views: 299

### Re: Shape Names

The shape is called "bent."
Sun Nov 29, 2020 11:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 47
Views: 271

### Re: Lone Pair E-

Yes, lone pair electrons do count.
Sun Nov 29, 2020 11:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H2O VSEPR
Replies: 27
Views: 147

### Re: H2O VSEPR

H2O would be bent because of the lone pairs.
Sun Nov 29, 2020 11:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: finding the shape of a molecule
Replies: 6
Views: 33

### Re: finding the shape of a molecule

You should draw the most stable Lewis structure to find the molecule's geometric shape.
Sun Nov 22, 2020 10:36 pm
Forum: Hybridization
Topic: pi bonds
Replies: 12
Views: 209

### Re: pi bonds

Pi bonds form when p orbitals overlap.
Sun Nov 22, 2020 10:35 pm
Forum: Hybridization
Topic: Shape of Hybrid Orbital
Replies: 5
Views: 46

### Re: Shape of Hybrid Orbital

Do we have to know how to determine the shapes of hybrid orbitals.
Sun Nov 22, 2020 10:34 pm
Forum: Hybridization
Topic: Sapling#11
Replies: 6
Views: 29

### Re: Sapling#11

It is because there are 4 orbitals (1 s and 3 p).
Sun Nov 22, 2020 10:32 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 10
Views: 91

### Re: Pi and Sigma Bonds

All covalent bonds have sigma and pi bonds. Single bonds only have sigma bonds, and double and triple bonds have sigma and pi.
Sun Nov 22, 2020 10:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 21
Views: 119

### Re: Bond Angles

Bond angles are experimentally determined rather than calculated.
Sun Nov 15, 2020 9:31 pm
Forum: Dipole Moments
Topic: London Dispersion forces
Replies: 14
Views: 75

### Re: London Dispersion forces

All molecules experience London Dispersion Forces.
Sun Nov 15, 2020 9:29 pm
Forum: Resonance Structures
Topic: resonance structures
Replies: 10
Views: 45

### Re: resonance structures

The resonance structure with charges closest to zero will contribute the most.
Sun Nov 15, 2020 9:29 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 11
Views: 98

### Re: Resonance

The most stable resonance structure has to little to no charges on each atom.
Sun Nov 15, 2020 9:26 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 153

### Re: bond length

No, we do not need to calculate actual lengths.
Sun Nov 15, 2020 9:25 pm
Forum: Ionic & Covalent Bonds
Topic: Sapling week 5 & 6 #16
Replies: 7
Views: 42

### Re: Sapling week 5 & 6 #16

The answer is D because it is the only option that contains an H atom bonded between N, O, or F.
Sun Nov 08, 2020 11:43 pm
Forum: Dipole Moments
Topic: London Dispersion Forces
Replies: 5
Views: 146

### Re: London Dispersion Forces

Yes, every molecule has LDF.
Sun Nov 08, 2020 11:42 pm
Forum: Octet Exceptions
Topic: selenium
Replies: 6
Views: 40

### Re: selenium

Yes, selenium is an exception to the octet rule.
Sun Nov 08, 2020 11:42 pm
Forum: Resonance Structures
Topic: Valence Electrons [ENDORSED]
Replies: 43
Views: 328

### Re: Valence Electrons[ENDORSED]

You can figure out the valence electrons of an element by counting which column it is in, skipping the d block.
Sun Nov 08, 2020 11:40 pm
Forum: Lewis Structures
Topic: Lewis acids and bases
Replies: 10
Views: 71

### Re: Lewis acids and bases

Acids accept electron pairs, while bases donate electron pairs.
Sun Nov 08, 2020 11:37 pm
Forum: Ionic & Covalent Bonds
Topic: HW Question
Replies: 4
Views: 54

### Re: HW Question

The answer would be London dispersion force and dipole-dipole.
Sun Nov 01, 2020 6:32 pm
Forum: Trends in The Periodic Table
Topic: Group/Period Trends
Replies: 7
Views: 60

### Re: Group/Period Trends

I learned throughout high school to prioritize the vertical vertical direction!
Sun Nov 01, 2020 6:25 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state electron configuration?
Replies: 9
Views: 47

### Re: Ground state electron configuration?

When an atom is at its ground state, it is at its lowest, unexcited, and most stable energy level.
Sun Nov 01, 2020 6:18 pm
Forum: Trends in The Periodic Table
Replies: 14
Views: 68

Anions have the largest ionic radius, while cations have the smallest ionic radius.
Sun Nov 01, 2020 6:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Replies: 8
Views: 48

Whichever ions have the most protons have the smallest ionic radius, because they pull the electrons in tighter.
Sun Nov 01, 2020 6:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: l=4
Replies: 13
Views: 85

### Re: l=4

Yes, it is possible for l to equal 4, but it is not necessary to know for this class.
Sun Oct 25, 2020 10:49 pm
Forum: Properties of Electrons
Topic: intensity vs energy
Replies: 29
Views: 256

### Re: intensity vs energy

This is false, because frequency and energy increase simultaneously.
Sun Oct 25, 2020 10:45 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 40
Views: 1783

### Re: Noble Gases

No, noble gases do not apply to the electronegativity trend.
Sun Oct 25, 2020 10:44 pm
Forum: Lewis Structures
Topic: Cl as a central atom
Replies: 5
Views: 299

### Re: Cl as a central atom

Chlorine is an exception to the octet rule.
Sun Oct 25, 2020 10:43 pm
Forum: Ionic & Covalent Bonds
Topic: hydrogen
Replies: 19
Views: 241

### Re: hydrogen

Hydrogen bounds are only found on oxygen, fluorine, and nitrogen.
Sun Oct 25, 2020 10:40 pm
Forum: Ionic & Covalent Bonds
Topic: Is ionic or covalent stronger?
Replies: 31
Views: 394

### Re: Is ionic or covalent stronger?

Ionic bonds are stronger than covalent bonds. This is due to coulombic attraction.
Sun Oct 18, 2020 9:52 pm
Forum: Properties of Light
Topic: Photoelectric spectrum
Replies: 24
Views: 163

### Re: Photoelectric spectrum

It could be helpful to have a general idea of what the spectrum looks like, but I do not think specifics are necessary.
Sun Oct 18, 2020 9:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Replies: 92
Views: 2110

It could be helpful to reach out to people in your same section to form a study group.
Sun Oct 18, 2020 9:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration
Replies: 8
Views: 341

### Re: Electron Configuration

I believe 3d comes before 4s.
Sun Oct 18, 2020 9:46 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 36001

### Re: Final Jitters

I try to get a good night of sleep before big exams, and I wake up early and give myself enough time to get prepared.
Sun Oct 18, 2020 9:45 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

### Re: How are you studying?

I actively take notes during lectures, and then I use those notes for homework. I have not done many textbook problems yet, but I plan to do them to study for exams.
Sun Oct 18, 2020 9:43 pm
Forum: Trends in The Periodic Table
Topic: Period Trends
Replies: 11
Views: 119

### Re: Period Trends

There is a trend for atomic radius.
Sun Oct 11, 2020 5:13 pm
Forum: Significant Figures
Topic: Which number determines sig figs of the answer?
Replies: 26
Views: 179

### Re: Which number determines sig figs of the answer?

What should be done if the smallest number in the problem has 1 sig fig, and the answer is something like 1432 g? Should we round to 1000 g since that would be 1 sig fig?
Sun Oct 11, 2020 5:11 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass and Molecular Mass Difference?
Replies: 21
Views: 256

### Re: Molar Mass and Molecular Mass Difference?

What is an amu? I understand that it is a unit for molecular mass, but what does it stand for?
Sun Oct 11, 2020 5:04 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Moles vs molecules
Replies: 14
Views: 152

### Re: Moles vs molecules

Moles are a counting unit. Just like how a dozen eggs are 12 eggs, 1 mole of atoms/molecules is 6.022x10^23 atoms/molecules.
Sun Oct 11, 2020 5:01 pm
Forum: Significant Figures
Topic: Molar Mass Sig Figs
Replies: 9
Views: 81

### Re: Molar Mass Sig Figs

I do 2 sig figs after the decimal point, which usually means 4 sig figs total.
Sun Oct 11, 2020 4:58 pm
Forum: Significant Figures
Topic: Sapling HW #4
Replies: 31
Views: 327

### Re: Sapling HW #4

I was taught that "sandwiched" zeroes count as sig figs, so thinking of that always helps me.