MOLARITY (General Physics 2)
Molarity
the number of moles of Solute
(the material dissolved) per liter of solution.
-https://www.chemicool.com/definition/molarity.html
is the number of moles of the solute contained in one liter of the solution.
-http://www.solitaryroad.com/c1504.htm
Example
Adding salt (NaCl) in some volume of water (H2O).
Calculation!
Two information are needed:
The moles of solute present in the solution.
The volume of solution (in liters) containing the solute.
Formula
Example Problem:
What is the molarity of a 0.40 moles of NaCl dissolved in 0.250L of water?
Answer:1.6M
Solution:
M= 1.6 moles/L
Suppose you had 58.44 grams of NaCl and you dissolved it in exactly 2.00 L of solution. What would be the molarity of the solution?
Answer:
M= 0.500
Solution:
Convert grams to moles.
Perform the standard formula.
quiz!
1. Calculate the molarity of 25.0 grams of KBr dissolved in 750.0 mL.
2. 80.0 grams of glucose (C6H12O6, mol. wt = 180. g/mol) is dissolved in enough water to make 1.00 L of solution. What is its molarity?
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