Molarity Worksheet Key(1)

Molarity Worksheet Key(1) - Solution Concentration...

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Main topics: Molarity, dilutions, % solution These topics are considered prerequisite to the course. Below is some practice and help with the topics. Brief tutorial on these topics: (See the textbook for more help, pages 97-100.) Molarity = (moles solute)/(liter solution) Dilution: It is common to store liquid solutions in concentrated form and then to dilute them when needed to the appropriate molarity. It takes less space to store 1 L of 12 M HCl (12 moles of HCl total) than to store 12 L of 1 M HCl (12 molesof HCl total). Consider this case: You have a 12 M HCl solution. You want a diluted solution. Follow the steps below. Now consider this more specific case: You have a 12 M HCl solution. You want 500 mL of a 2 M solution. How do you make it? How many moles HCl do you need? 2 mol/L * 0.5 L = 1 mole HCl needed. How much 12 M HCl would contain 1 mol HCl? 1 mol HCl * 1 L/12 mol HCl = 0.083 L = 83 mL You would mix 83 mL of the 12 M HCl with 417 mL water. Using M
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Molarity Worksheet Key(1) - Solution Concentration...

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