Strong Acids: HCl,HBr,HI,H2SO4,HClO4,HClO3, HNO3
Strong Bases: LiOH,NaOH,KOH,RbOH,CsOH,Ca(OH)2,Sr(OH)2,Ba(OH)2
These are the strongest acids and bases, which is dependent on the composition.
Search found 32 matches
- Mon Jun 11, 2018 7:10 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acids and bases
- Replies: 3
- Views: 603
- Mon Jun 11, 2018 7:06 pm
- Forum: Ionic & Covalent Bonds
- Topic: Test 3 Q7
- Replies: 3
- Views: 460
Re: Test 3 Q7
It has a greater electronegativity and higher electron density which makes it more ionic.
- Mon Jun 11, 2018 7:03 pm
- Forum: Hybridization
- Topic: Lone pairs and hybridization
- Replies: 2
- Views: 521
Re: Lone pairs and hybridization
There is a list of all the shapes and arrangements of chemicals, there is a difference between shape and arrangement which depends on the amount of lone pairs attached and atoms in a formula. This list has helped me differentiate between the two: https://www.google.com/search?q=molecular+shapes&...
- Mon Jun 11, 2018 7:01 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: T-Shape
- Replies: 6
- Views: 819
Re: T-Shape
T-shape is made up of two lone pairs and three bonded elements to the central atom. Thus the arrangement would have to be similar to a trigonal pyramidal with two lone pairs, so the angles would be 90 degrees apart for the T-shape with two lone pairs attached.
- Mon Jun 11, 2018 6:49 pm
- Forum: Hybridization
- Topic: Composition
- Replies: 2
- Views: 467
Re: Composition
Are you asking in regards to the composition of each bond as asked in the Final Practice Exam? In that case you would look at all the components attached to the bond in question to find out what makes up it's composition.
- Mon Jun 11, 2018 2:09 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: orbital vs subshell [ENDORSED]
- Replies: 3
- Views: 540
Re: orbital vs subshell [ENDORSED]
Orbitals are contained in subshells, they make up the number of electrons in an atom.
- Mon Jun 11, 2018 2:07 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: weak acids
- Replies: 4
- Views: 712
Re: weak acids
I think we need to know the difference between strong and weak acids, and what makes an acid weak.
- Mon Jun 11, 2018 2:05 pm
- Forum: Bond Lengths & Energies
- Topic: antibond? [ENDORSED]
- Replies: 2
- Views: 571
Re: antibond? [ENDORSED]
An antibond works to weaken the bond between two atoms in order to raise the energy of the molecule as a whole. The density of the electrons builds up outside the bond to create a repulsive force between the atoms to separate them. I don't think we need to know this for the final, but hope it helps!
- Sun Jun 10, 2018 1:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: Finding Bond order
- Replies: 2
- Views: 451
Re: Finding Bond order
Calculate bond order by dividing the number of bonds between atoms by the total number of bond groups in the molecule after drawing the lewis structure.
- Sun Jun 10, 2018 12:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Trigonal planar vs Bent
- Replies: 1
- Views: 1807
Re: Trigonal planar vs Bent
The shape for ClO2+ lewis structure is bent considering the placement of the atoms around the central atom. Since, there are unbonded electrons attached to one side of the atom, this creates a trigonal planar arrangement. In this case shape and arrangement are different and both are provided as an a...
- Sun Jun 10, 2018 12:48 pm
- Forum: Hybridization
- Topic: Electron densisty
- Replies: 5
- Views: 840
Re: Electron densisty
Draw out the lewis structure then count the total regions of high electron density around the central atom. These areas of high intensity include unbonded electrons and bonds.
- Wed Jun 06, 2018 12:29 pm
- Forum: Hybridization
- Topic: The number before the sp
- Replies: 3
- Views: 483
Re: The number before the sp
With energy levels, make sure to take note which level each orbital is on depending on the location of the element on the periodic table.
- Wed Jun 06, 2018 12:03 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.95
- Replies: 1
- Views: 287
Re: 4.95
Well a pi bond forms when there is overlap of p orbitals, would not work with s orbital.
- Wed Jun 06, 2018 12:00 pm
- Forum: Lewis Acids & Bases
- Topic: Weak vs strong acids [ENDORSED]
- Replies: 7
- Views: 1035
Re: Weak vs strong acids [ENDORSED]
Depending on the type of group it has attached, you can tell whether it is acidic or basic, as well as the number of hydrogens a formula has.
- Mon May 28, 2018 5:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: shapes
- Replies: 3
- Views: 516
Re: shapes
The shapes we've looked at in class are linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral.
- Mon May 28, 2018 5:09 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular shape of H2O
- Replies: 2
- Views: 373
Re: Molecular shape of H2O
The form is a tetrahedral but since it has unpaired electrons, it is considered a bent shape.
- Mon May 28, 2018 5:07 pm
- Forum: Dipole Moments
- Topic: London Forces
- Replies: 7
- Views: 948
Re: London Forces
A natural explanation is the way geckos can climb on upright surfaces. There are fluctuations in charge distributions between neighboring molecules, which don't have to be polar, and their charge fluctuations naturally fall into synch, creating an attractive force.
- Sun May 06, 2018 8:27 pm
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 32772
Re: formula units [ENDORSED]
Yes, you can use Avogadro's number to convert to formula units.
- Sun May 06, 2018 8:26 pm
- Forum: Lewis Structures
- Topic: Electron Configuration
- Replies: 6
- Views: 789
Re: Electron Configuration
The 4s orbitals fill first and have a lower energy than 3d, so the 4s needs to be filled first.
- Sun May 06, 2018 8:23 pm
- Forum: Ionic & Covalent Bonds
- Topic: Atomic and Ionic Radius
- Replies: 2
- Views: 484
Re: Atomic and Ionic Radius
Atomic radius is the size of its atoms, usually the mean and typical distance from the center of the nucleus to the surrounding cloud of electrons. Ionic radius is the radius of an atom's ion. Ionic radii increase down a group and decrease across a period, whereas its the opposite for the atomic rad...
- Sun Apr 29, 2018 9:56 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Orientation of Lobes
- Replies: 3
- Views: 533
Re: Orientation of Lobes
Yes, it pretty much means to find the amount of orbitals in a shape, which depends on the way the shape is oriented on a node (plane).
- Sun Apr 29, 2018 9:53 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Atomic Radius
- Replies: 4
- Views: 528
Re: Atomic Radius
The atomic radius of an element depends on its location on the periodic table. In general, the more left you go on a certain period, the atomic radius will increasingly decrease. As you move downwards, the radius will increase in size, as electrons fill in valence shells. Hope that helps!
- Sun Apr 29, 2018 9:50 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Using shorthand [Ar] [ENDORSED]
- Replies: 5
- Views: 594
Re: Using shorthand [Ar] [ENDORSED]
Yes, you can use that for shorthand. Any noble gas will work, as long as it is the closest one.
- Sun Apr 22, 2018 10:39 pm
- Forum: Properties of Electrons
- Topic: Wave Properties: Constructive and Destructive Interference
- Replies: 2
- Views: 452
Re: Wave Properties: Constructive and Destructive Interference
The significance of amplitude is that it measures the amount of energy a wave carries, so it will determine the intensity of a wave in comparison to other waves with different amplitudes. The higher the amplitude, the greater the intensity of the wave. Hope that helps!
- Sun Apr 22, 2018 2:09 pm
- Forum: Properties of Light
- Topic: Electromagnetic Spectrum [ENDORSED]
- Replies: 7
- Views: 783
Re: Electromagnetic Spectrum [ENDORSED]
I think we should know the ranges of each spectrum, such as the differences between visible and UV light, but I don't think we need to know the exact numbers for each color of visible light.
- Sun Apr 22, 2018 2:03 pm
- Forum: Einstein Equation
- Topic: E=hv vs E=hf [ENDORSED]
- Replies: 4
- Views: 4329
Re: E=hv vs E=hf [ENDORSED]
Yes, they are the same formula. Sometimes frequency is written in terms of speed formula.
- Sun Apr 15, 2018 3:49 pm
- Forum: Properties of Light
- Topic: HW 1.23
- Replies: 2
- Views: 270
Re: HW 1.23
It describes the relationship between electron-Volts(eV) with Joules(J), so this number is needed in order to convert eV to J.
- Sun Apr 15, 2018 3:41 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Expirement [ENDORSED]
- Replies: 4
- Views: 487
Re: Photoelectric Effect Expirement [ENDORSED]
The Photoelectric effect resulted from the results of the photoelectric experiment. The effect is when the electrons were ejected from a metal when the surface of the metal was exposed to ultraviolet radiation (Lavelle et.al, 153). The results were that the UV radiation had to be above a certain thr...
- Sun Apr 15, 2018 3:24 pm
- Forum: Photoelectric Effect
- Topic: What is a vacuum?
- Replies: 7
- Views: 835
Re: What is a vacuum?
A vacuum is a region of space with nothing in it, so when an experiment is done in a vacuum, all the photons, air, and particles are removed from the region to create a space of nothing but pressure. The photoelectric experiment showed this effect of electrons being "ejected" from the metal.
- Sun Apr 08, 2018 8:39 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Electron Configuration
- Replies: 1
- Views: 256
Electron Configuration
Do we need to know how to find the electron configuration and will it need to be shorthand or not?
- Sun Apr 08, 2018 8:22 pm
- Forum: Balancing Chemical Reactions
- Topic: Memorizing the charges of ions
- Replies: 3
- Views: 437
Re: Memorizing the charges of ions
There are some indications of what the charges of certain ions are based on their composition or place on the periodic table. Those on the left (metals) are positive going +1,+2,+3 and those on the right (non-metals) are negative. However, I agree that there are some charges that do not adhere to th...
- Sun Apr 08, 2018 8:17 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing the Equation
- Replies: 9
- Views: 1220
Re: Balancing the Equation
Try to do them step by step. As in working with one element at a time and taking into account how many atoms it has as a reactant and a product.