Search found 66 matches

by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
Thu Dec 17, 2020 12:35 am
Forum: Conjugate Acids & Bases
Topic: Alkaline
Replies: 15
Views: 89

Re: Alkaline

Yes, alkaline means basic.
by joshtully
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.
by joshtully
Thu Dec 17, 2020 12:32 am
Forum: Lewis Acids & Bases
Topic: Water
Replies: 62
Views: 492

Re: Water

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

Re: Water

Water can act as both.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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).
by joshtully
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."
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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).
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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!
by joshtully
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.
by joshtully
Sun Nov 01, 2020 6:18 pm
Forum: Trends in The Periodic Table
Topic: ionic radius
Replies: 14
Views: 68

Re: ionic radius

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

Re: Radius

Whichever ions have the most protons have the smallest ionic radius, because they pull the electrons in tighter.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
Sun Oct 18, 2020 9:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 92
Views: 2110

Re: Advice for studying

It could be helpful to reach out to people in your same section to form a study group.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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.
by joshtully
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?
by joshtully
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?
by joshtully
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.
by joshtully
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.
by joshtully
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.

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