Sunday, January 8, 2012

Molarity: mole concentration

Molarity
-the number of moles of solute in one litre of a solution

In a homogenous mixture where one substance is dissolved in another
-the chemical that is being dissolved  is called solute
-the chemical that does the dissolving is called solvent


Formula



Exercise


How would you prepare 100. mL of 0.25 M KNO3 solution?
Dissolve 2.53 g of KNO3 in enough water to make 100 ml of solution.


A chemist dissolves 98.4 g of FeSO4 in enough water to make 2.000 L of solution. What is the molarity of the solution?
0.324 M

How many moles of KBr are in 25.0 mL of a 1.23 M KBr solution?
0.0308 mol

Battery acid is generally 3 M H2SO4. Roughly how many grams of H2SO4 are in 400. mL of this solution?
120 g





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