It is happy new year with a touch of MOLARITY

hmm So what is Molarity???? To be honest I don't know :X. Jokes Molarity is the amount of solute dissolved in what ever volume of Solution 

okay? so What is Solute and Solution? HMMM as we were told this was once written into our brains a while ago and since our mind have always being written into since grade 1 most of the stuff that was ever written is erased so it makes perfect sense that no one remembers what solute and solution means. Okay enough random talking lets get to the real stuff so hmm what is solute and solution? Solute is the THING that is BEING DISSOLVED and Solution is THE THING THAT IS DISSOLVING THE SOLUTE (yes solution is all caps because it is cool that way unlike Johnny(FACT)) jokes

The Formula ahh math again...

 Nothing out of the normal 

Molarity = Moles of Solute(mole)/Volume of Solution (L)

M = mol/L  SEE WHY mole isn't M but the lame abbreviation of mol since Molarity decided to steal it..

okay the fun examples now 

4 grams (C12H22O11) is dissolved in a 350 ml teacup. What is the molarity of the sugar solution?

First step

C12H22O11= C(12)(12) + H(1)(22) + O(16)(11)
C12H22O11= 144 + 22+ 176
C12H22O11= 342 g/mol

4 g/(342 g/mol) = 0.0117 mol

350 ml x (1L/1000 ml) = 0.350 L

and the final step 

0.0117/0.35 = 0.033 mol/L

ahh that was lots of typing T T

Okay second question

How many moles of salt are contained
in 300 mL of a 0.40 M NaCl solution?

0.300 L x 0.40 moles NaCl
               1.00 L                 = 0.12 moles NaCl

Third question

15grams of salt with a molarity of 0.458M what is the volume of salt?

Atomic mass of NaCl is 58.5g/mole

15G x 1 mole/ 58.5g = 0.256410 moles

0.256410/0.458 = 0.56 Ml

okay a little game that i found using Molarity

• Materials Needed:
• computer
• projector
• molarity slides
• periodic table
• notes
• wordbank

• Procedure:
• Opener:
1. Review with students the formulas for molar mass (atomic mass = 1 mole), molecules (6.02 x 10^23 molecules = 1 mole), molarity (mole/liter), and toxicity (weight in kg * LD50).
• Development:
1. Divide class into 2 teams.
2. Show the 5 categories. Explain that higher point questions are harder.
3. Explain that each team must elect a captain, who will be the person to give the final answer.
4. Explain that team 1 will choose a question to answer. Team 2 must also prepare to answer the question in case team 1 gives an incorrect answer. The team with the most points wins!
• Closure:
1. Suggestion: offer extra credit or free homework grade to the winners (although no incentive was necessary for a heated competition!).