User:Masterhomer/Chemistry 3

Determine the molar concentration of solutions of given masses of solute in given volumes of solution.

Huh what? That's my first responce.

We know however that molar concentration is that crazy M thing that usually follows some number.

That stands for Moles per Liter (M)

So if your given the molecular weight of said solute, and the volume, you should be able to find M.

It's just another stupid mathematical problem. Don't let the fool you by changing the wording or the variables.

1 M = (1 Mol / 1 L) so lets say you got some element with a molecular mass of lets say 55, and there is 500 mL of solution with 100 G of it

first find the moles

100G/55G = 1.81 Moles

then find the x to 1 L ratio

1L/0.5L=2

then multiply the x to 1 L ratio by your first equasion

1.81 Moles * 2 = 3.62 M

It's 3.62 M.

Calculate either the volumes of solutions, masses of solutes, or molar concentrations, given the molar masses of the solute and any two of the other parameters.

Was this rubric ment to sound complicated? This is pretty much the same as above, except you change the order around. They make the questions look complicated to fail you, but they are really easy.

Describe how to make a dilute solution of a given molarity from a more concentrated solution of a given molarity.

Wow easy shit.

Your a drug dealer, you got some LSD. Now you want to maximise your profits you dilute the solution a bit before you sell it.

lets say you got a 5 M solution of LSD

and you want to make it 2 M

well, maybe common sense told you that doubling the water in the solution would give you 2.5 M. it's really not much harder

see, you know 5 M is 5 moles per liter

so if you had 1 liter, you'd have...... 5 moles, yes that right!

ok that was not important. what is important is

5 / 2 = 2.5 5 M / 2 L = 2.5 M

you know that right? change it around! Simple algebra!

5 M / X L = 2 M

solve for X

5 = 2X X = 2.5 L

That's right, you'd need 2.5 L to make 2 M of LSD from 5 M

moving on...

Calculate the concentration of a solution from titration data.

Do your lab

Answer questions similar to those asked in the “Solutions” BONDing activity.

Do your bonding

Determine concentrations of ions in a solution of a soluble salt.

No clue

Describe the Arrhenius definitions of acids and bases.
Know the seven strong acids (HCl, HBr, HI, HNO3, HClO3, HClO4, H2SO4).
Distinguish between monoprotic and polyprotic acids.
Determine the net ionic equations for acid base and for gas forming reactions.
Understand the concepts and employ the relationships between wavelength, frequency, color and energy of electromagnetic radiation to determine any of these parameters, given appropriate data.
Qualitatively describe the energy levels in the Bohr model of the hydrogen atom. Determine which transitions emit the least or most energy.
Calculate deBroglie wavelengths of moving objects from appropriate data.
Understand the relationships between each of the four principal quantum numbers and what they represent.
Know the contributions of Planck, Rutherford, Bohr, deBorglie, Schrodinger, Heisenberg, Pauli and Hund.
Identify the appropriate quantum numbers for an electron in a given orbital.
Describe the general shapes of the s, p, and d orbitals.
Describe the difference between shell and subshell.
Determine the electron configurations of atoms and ions.
Remember the electron configurations of chromium and copper.
Describe the reasons why certain electron configurations are more stable than others.
Predict whether an atom or ion is paramagnetic.
Describe trends in atomic radii, ionization energies, and electron affinities of elements in the periodic table, and reasons for these trends.
Describe the ionization energy and electron affinity processes.
Predict the relative sizes of atoms and ions.