Chemistry...HELP! Molarity, Concentration, Conversions, pH, pOH, [OH-]?

Question

I need a review of everything really badly. I obviously don't understand chemistry. Could anyone explain everything to me in a easy way? Maybe send me a website with "how to's" on it? Test is coming soon and I can't afford to get a terrible grade. Thanks.

Answer 1

Here's one of concentrations:

http://dl.clackamas.edu/ch105-04/

Try here for pH - you'll have to sign up for a trial membership

http://www.brainpop.com/science/matter/ph/

Here's another one of pH

http://www.science.uwaterloo.ca/~cchieh/cact/c123/ph.html

Here's something on pOH

http://dbhs.wvusd.k12.ca.us/webdocs/AcidBase/pOH.html

Try this for your conversions:

http://www.chemistrycoach.com/use.htm

Answer 2

Molarity is the number of moles of solute dissolved in one liter of solution. The units, therefore are moles per liter, specifically it's moles of solute per liter of solution.

molarity = moles of solute
liter of solution

Concentration is the measure of how much of a given substance there is mixed with another substance



pH is a measure of the acidity or basicity of a solution. Ph ranges from 1-14
where in 1-7 is acidic and 7-14 is considered alkaline or basic.


pOH, in a sense the opposite of pH, which measures the concentration of OH− ions, or the basicity. Since water self ionizes, and notating [OH−] as the concentration of hydroxide ions,

pH = - log [H+]

pOH = - log [OH¯]

http://www.purchon.com/chemistry/ph.htm


ALL THE BEST FOR YOUR EXAMS....

Answer 3

Concentration of a solute : maas of the solute by liter of solution

example NaOH 40g/L (there is 40g of NaOH) in 1 liter

Molarity n nomber of moles by liter of solution

the same example .the molecular mass of NaOH is 40 . So if you have the solution of 40g/L , its molarity is 40/40 =1 mole/Liter or molar solution

pH / this is a definition to learn by heart

In water there are H+ ions and OH- ions . The product of their concentrations is a constant [H+][OH-] = 10^14

BY definition pH = log 1/[H+] you must learn this

and the same pOH =log 1/[OH-]

And pH+pOH =14

Answer 4

Its called a textbook. They can be found in Libraries

Answer 5

convert to MOLES!!!