Search found 30 matches
- Thu Dec 06, 2018 11:11 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: H30+ and H+
- Replies: 4
- Views: 52
Re: H30+ and H+
H+ does not usually exist as a single proton and binds with water.
- Thu Dec 06, 2018 11:10 pm
- Forum: Photoelectric Effect
- Topic: Work Function
- Replies: 14
- Views: 294
Re: Work Function
Use the equation EK = h v - workfunction to solve.
- Thu Dec 06, 2018 11:09 pm
- Forum: Bronsted Acids & Bases
- Topic: Glucose as an acid
- Replies: 3
- Views: 40
Re: Glucose as an acid
I do not think it is either, as well.
- Fri Nov 30, 2018 7:32 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizability
- Replies: 5
- Views: 74
Re: Polarizability
When it is highly polarizable, this means its electron cloud has a higher chance of being distorted, usually because of the size of the anion.
- Fri Nov 30, 2018 7:31 am
- Forum: Hybridization
- Topic: hybridization notation
- Replies: 3
- Views: 54
Re: hybridization notation
The 2 refers to the energy level of the orbital.
- Fri Nov 30, 2018 7:29 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bond angle
- Replies: 6
- Views: 69
Re: bond angle
Since you cannot know the exact angle, <120 is acceptable.
- Fri Nov 30, 2018 7:29 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pairs
- Replies: 3
- Views: 57
Re: Lone pairs
Lone pairs have a larger volume of space whereas the electrons on the atoms are more restricted by the bonds so the repulsion is less.
- Fri Nov 30, 2018 7:28 am
- Forum: Sigma & Pi Bonds
- Topic: Sigma bonds
- Replies: 6
- Views: 117
Re: Sigma bonds
Sigma bonds overlap on top of each other.
- Fri Nov 30, 2018 7:27 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: test #3
- Replies: 14
- Views: 264
Re: test #3
You should know the bond angles. Also, it helps to follow the outlines he posted as to what is on the test.
- Thu Nov 15, 2018 4:52 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 10
- Views: 209
Re: Formal Charge
It is important to pay attention to the formal charge as not all elements adhere to the octet rule.
- Thu Nov 15, 2018 4:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Double Bonds in VSEPR
- Replies: 5
- Views: 53
Re: Double Bonds in VSEPR
The double bond will still be considered one area of electron density so there is no difference in the model.
- Thu Nov 15, 2018 4:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Planar vs Pyramidal
- Replies: 3
- Views: 42
Re: Planar vs Pyramidal
Even if the atoms are different, it will still be planar.
- Thu Nov 08, 2018 10:09 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 2
- Views: 111
Re: VSEPR
Look at bonding electrons and lone pairs of electrons around the central atom. Sulfur has four bonds and one lone pairs of electrons, so the formula is AX4E which corresponds to the see-saw shape
- Thu Nov 08, 2018 10:06 pm
- Forum: Octet Exceptions
- Topic: Octet vs formal charge
- Replies: 15
- Views: 235
Re: Octet vs formal charge
It is important to make sure the formal charge is as accurate as possible but always be aware of the octet rule and its exceptions
- Mon Nov 05, 2018 12:56 pm
- Forum: DeBroglie Equation
- Topic: work function and frequency
- Replies: 4
- Views: 124
work function and frequency
How do you calculate the frequency of an incident light when given the wavelength and work function (for example: if the wavelength of the ejected electron is 1.1 nm, what was the frequency of the incident light? The work function of sodium is 150.6 kj mol-1)
- Fri Nov 02, 2018 8:45 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent Bonds
- Replies: 18
- Views: 251
Re: Ionic vs Covalent Bonds
Ionic bonds involve the transfer of electrons while in covalent bonds the electron is shared
- Fri Nov 02, 2018 8:43 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Degenerate orbitals
- Replies: 3
- Views: 64
Re: Degenerate orbitals
Degenerate orbitals are orbitals that have the same energy level
- Fri Nov 02, 2018 8:39 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Is electron removed from 3d or 4s first?
- Replies: 5
- Views: 481
Re: Is electron removed from 3d or 4s first?
The electron will be removed from 4s first since 3d has slightly higher energy.
- Thu Oct 25, 2018 6:46 pm
- Forum: Properties of Electrons
- Topic: mass of electron
- Replies: 5
- Views: 168
Re: mass of electron
It might be faster when doing calculations to memorize the value, however, most constants and equations can be found on a reference sheet during an exam.
- Thu Oct 25, 2018 6:44 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty of an Electron's Velocity & Speed of Light
- Replies: 4
- Views: 142
Re: Uncertainty of an Electron's Velocity & Speed of Light
Nothing can go faster than the speed of light, so since the model shows the velocity of the electron as being faster, it was disproved.
- Thu Oct 25, 2018 6:27 pm
- Forum: Einstein Equation
- Topic: E=hv
- Replies: 14
- Views: 275
Re: E=hv
E represents the energy of the photon but you can also use this equation to find the energy needed to remove the electron, just remember to pay attention to kinetic energy.
- Thu Oct 18, 2018 6:00 pm
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 5
- Views: 95
Re: Speed of Light
Nothing can travel faster than the speed of light.
- Thu Oct 18, 2018 5:56 pm
- Forum: DeBroglie Equation
- Topic: units
- Replies: 3
- Views: 74
units
When using DeBroglie's equation do you have to calculate given values into certain units before putting them into the equation?
- Thu Oct 18, 2018 5:55 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: orbitals
- Replies: 2
- Views: 54
orbitals
How do you find the number of orbitals in a sub shell when given the value of l?
- Fri Oct 12, 2018 8:24 am
- Forum: SI Units, Unit Conversions
- Topic: Units
- Replies: 8
- Views: 138
Re: Units
I am not sure about points but it is a good idea to write the units in your work just in case and so you know what the correct units should be at the end for your answer
- Fri Oct 12, 2018 8:22 am
- Forum: Significant Figures
- Topic: sig figs urgent question!
- Replies: 12
- Views: 361
Re: sig figs urgent question!
There are 4 significant figures because the zeros are in between 1s which are sig figs.
- Fri Oct 12, 2018 8:21 am
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reagent
- Replies: 10
- Views: 277
Re: Limiting Reagent
personally, I would use the amount of each reagant to calculate the amount of moles you have then use the molar ratio to determine how many moles of each substance you need to find the limiting reactant that way.
- Thu Oct 04, 2018 6:29 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: aqueous solutions
- Replies: 1
- Views: 49
aqueous solutions
How do we explain how to prepare an aqueous solution when given the amount we need to prepare and a percent composition of a compound (such as in question G.7 in the sixth edition)?
- Thu Oct 04, 2018 6:25 pm
- Forum: Empirical & Molecular Formulas
- Topic: Molecular Formula
- Replies: 12
- Views: 113
Molecular Formula
How do you write the molecular formula for a compound when given the diagram of the molecular structure? (such as in question F.1 in the sixth edition for example)
- Thu Oct 04, 2018 6:04 pm
- Forum: Empirical & Molecular Formulas
- Topic: Homework Problem F.3 (part a)
- Replies: 2
- Views: 63
Re: Homework Problem F.3 (part a)
There are some common rules you can memorize to help you find the formulas for acids and other compounds. For example, if an acid ends in "ic," it comes from an anion that ended in "ate," in this case nitrate (NO3-). Since the anion has a 1- charge, one hydrogen is needed to bala...