Molarity and Dilution Calculations

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Chemistry
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is molarity?
Back
Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.
2.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from molarity and volume?
Back
Number of moles = Molarity (M) × Volume (L).
3.
FLASHCARD QUESTION
Front
What is the formula for dilution?
Back
C1V1 = C2V2, where C1 and V1 are the concentration and volume of the stock solution, and C2 and V2 are the concentration and volume of the diluted solution.
4.
FLASHCARD QUESTION
Front
If you dilute a solution from 1.0 M to 0.5 M, what happens to the volume?
Back
The volume increases; dilution means adding more solvent.
5.
FLASHCARD QUESTION
Front
How many moles of solute are in 1 L of a 2 M solution?
Back
2 moles of solute.
6.
FLASHCARD QUESTION
Front
What is the molarity of a solution made by dissolving 0.5 moles of NaCl in 1 L of water?
Back
0.5 M.
7.
FLASHCARD QUESTION
Front
How do you prepare a 0.1 M solution from a 1 M stock solution?
Back
Use the dilution formula: C1V1 = C2V2. For example, take 10 mL of 1 M solution and dilute it to 100 mL.
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