CHEMISTRY COMMUNITY

Kelsey Ash 1D

Because strong acids have weaker bonds. Weak bonds usually indicate greater instability since they can easily be broken which explains why the stronger the acid the greater the dissociation of the acid in water to make the acid more stable by losing the hydrogen bond to form an anion.

Kelsey Ash 1D

A substance becomes more acidic as the pH decreases therefore the lower the pH the stronger the acid. The higher the pH the more basic the substance is therefore a substance with a higher pH will have be a weaker acid.

Kelsey Ash 1D

If an atom is said to be amphiprotic then that means that the atom has the ability to donate or accept protons whereas amphoteric is the ability of an atom to act as an acid or base.

Kelsey Ash 1D

A ligand is an ion or molecule that binds to a central atom to form a coordination compound by donating a pair of electrons to the acid.

Kelsey Ash 1D

Conjugate acid = A chemical compound formed by the reception of a proton by a base. It is a base with a hydrogen ion added to it.
Conjugate base = The species that is formed when an acid dissociates into its ions in water, it loses a hydrogen ion.

Kelsey Ash 1D

It is a type of chemotherapy which stops cell division in an attempt to keep the cancerous cells from spreading. Unfortunately it also affects normal healthy cells' ability to multiply.

Kelsey Ash 1D

You would use them if the ligand already had a prefix of di-, tr-, etc.

Kelsey Ash 1D

Yes because atom hybridization can be determined based on electron density surrounded the central atom (lone pairs and bonds attached to central atom). You find the hybridization number by simply counting the number lone pair regions and bonded pairs attached to the central atom.

Kelsey Ash 1D

Hybridization occurs when an atom needs to form more bonds than it would normally form in its ground state

Kelsey Ash 1D

Since sigma bonds always form first if there is a single bond then it is a sigma bond, if there is a double bond then there is one single bond and one pi bond present, and if there is a triple bond then there is still only 1 sigma bond but 2 pi bonds.

Kelsey Ash 1D

The AXE notation helps you determine molecular shape but it is important to note that just because molecules have the same formula have the same general shape but their bond angles may differ slightly

Kelsey Ash 1D

Yes that's right. Electron density affects molecular shape but you only refer to the electron which directly surround the atom itself

Kelsey Ash 1D

That's right

Kelsey Ash 1D

There is no difference. A VSEPR Model is just a way to show molecular geometry and shape

Kelsey Ash 1D

Since there is a seesaw shape the shape of the molecule is not symmetrical so the energies don't cancel making it polar

Kelsey Ash 1D

What is a Van Der Waals interaction and how is it different from a dipole moment? Or is it the same thing?

Kelsey Ash 1D

More bonds lead to shorter bond lengths because shorter bonds are stronger because the force of attraction with more electrons involved is stronger.

Kelsey Ash 1D

You know there is a dipole moment when there is an unequal sharing of electrons among atoms. The arrow always points in the direction in which the electron os being pulled.

Kelsey Ash 1D

Dissociation energies are always positive because it always requires energy to break a bond

Kelsey Ash 1D

A dipole moment is when a molecule has a positive charge next to an equal but opposite negative charge.

Kelsey Ash 1D

Electronegativity is how tightly the electrons are held together and polarizability is how easy/difficult it is to lose an electron.

Kelsey Ash 1D

You need to solve for formal charge if the question is asking for the electron configuration with the lowest energy. I thought in class today Lavelle said that he wanted us to always show the configuration with the lowest energy so I would just solve accordingly every time.

Kelsey Ash 1D

Yes because you always want to show the most stable structure and half filled shells are more stable.

Kelsey Ash 1D

Whenever I solve this equation out am getting the the energy of the photon is 1.936x10^-18 J but there is apparently this whole answer is supposed to be negative. Could someone please explain why this is; where does the negative sign come from?

Kelsey Ash 1D

When trying to find energy level n initial or n final I know you use the equation delta E=(-hR/nf^2)-(-hR/ni^2) but when ever I try to isolate out the variable I am looking for I am off by 1 negative sign every time and I don't know what I am doing wrong. Could someone please show the work for this ...

Kelsey Ash 1D

The ground state energy of an atom is when the atom is in it lowest energy state in which orbital subshells are paired before the electrons can move up to a higher orbital.

Kelsey Ash 1D

Double bonds are stronger and pull the atoms closer together which makes them shorter

Kelsey Ash 1D

Elements that haven't filled their d-orbital can have an expanded octet.

Kelsey Ash 1D

Is there a difference between resonance and resonance hybrid structures and if so what is it because I have been getting confused as to when I need to put the double headed arrow between the different molecules.

Kelsey Ash 1D

How do you calculate electronegativity?

Kelsey Ash 1D

What is the difference between 1st ionization energy and second ionization energy?

Kelsey Ash 1D

When explaining isoelectronic atoms in class today he kept mentioning the electrons in terms of OF electrons. What are OF electrons?

Kelsey Ash 1D

Electrons repel each other so the more electrons you have the greater the repulsion you have from the nuclear. By that logic, if you start to remove electrons the attractive forces between the surrounding electrons and the nucleus increases because there are less forces which repel the electrons. Th...

Kelsey Ash 1D

Atomic radius is the is half the distance between the centers of 2 neighboring atoms. Atomic radius decreases as you go across the periodic table from left to right and increases as you go down the periodic table.

Kelsey Ash 1D

Electron affinity is the amount of energy released when electrons are added to a gas phase atom and electronegativity is the tendency of an atom to attract a shared pair of electrons towards itself.

Kelsey Ash 1D

E is supposed to represent the energy of a photon

Kelsey Ash 1D

I think it just cuts out the middle ground and jumps to the next orbital so you are supposed to assume that the previous orbital is filled in order for the element to be in that position.

Kelsey Ash 1D

The radius isn't measured in the excited state. It's only measured in the ground state.

Kelsey Ash 1D

What is the difference between ionic and atomic radius?

Kelsey Ash 1D

What type of atoms prefer ionic bonds and what type of atoms prefer covalent bonds?

Kelsey Ash 1D

When balancing chemical equations you can only add/change the coefficient right? You can't change the subscript number? Because I've noticed a few differences in the solutions manual from the textbook and I don't know if there is just a misprint in 1 of the 2 books or if there is a rule that I am un...

Kelsey Ash 1D

You divide the given molar mass (the mass of the molecular formula) by the molar mass of the empirical formula. Whatever the product of that equation is is the number you multiply the empirical formula by.

Kelsey Ash 1D

Formula units can be an atom, compound, or a molecule. So basically you just have to use Avogadro's number to solve the equation.

Kelsey Ash 1D

For problem G.23 in the homework do you have to add the moles together of Cl in order to calculate the molarity of the element?

Kelsey Ash 1D

Since we have to post on chemistry community 5 times a week for credit does that mean that it's due before discussion each week or by Friday?

Kelsey Ash 1D

Since we have to post on chemistry community 5 times a week for credit does that mean that it's due before discussion each week or by Friday?

Kelsey Ash 1D

When finding the net ionic units do polyatomic ions remain connected or do you multiply out the end subscript by the preceding number?

Kelsey Ash 1D

Does anyone know if we will be given a periodic table for the tests in 14A?

Kelsey Ash 1D

What are the rules for significant figures again? It's been a while since I've done this and I cannot remember how to determine the correct number of significant figures for a problem/how it would be written.

Kelsey Ash 1D

In an equations such as Part D of question E. 23 where the the molecular equation is shown as Na(subscript)2 CO(subscript) 3 dot 10H(subscript)2O do add or multiplayer;y to the 2 equations to find the total molecular mass because I have tried both ways and seem to be getting a different answer from ...

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