Molarity and Dilution H
Flashcard
•
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 Molarity?
Back
Molarity = moles of solute / liters of solution.
3.
FLASHCARD QUESTION
Front
What is the formula to find moles from Molarity and volume?
Back
Moles = Molarity × Volume (in liters).
4.
FLASHCARD QUESTION
Front
If you have 40.0 g of NaCl, how do you find the moles of NaCl?
Back
Moles = mass (g) / molar mass (g/mol). For NaCl, molar mass = 58.44 g/mol.
5.
FLASHCARD QUESTION
Front
What is the molarity of a solution with 0.50 moles of NaCl in 400.0 mL of solution?
Back
Molarity = 0.50 moles / 0.4 L = 1.25 M.
6.
FLASHCARD QUESTION
Front
What is the volume of a 0.20 M solution containing 0.30 moles of Na2SO4?
Back
Volume = moles / Molarity = 0.30 moles / 0.20 M = 1.5 L.
7.
FLASHCARD QUESTION
Front
How many moles are in 2.5 L of a 3.8 M solution?
Back
Moles = Molarity × Volume = 3.8 M × 2.5 L = 9.5 moles.
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