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Molarity and Dilutions

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Presentation on theme: "Molarity and Dilutions"— Presentation transcript:

1 Molarity and Dilutions
Can you solve these problems?

2 If you dilute 175 mL of a 1. 6 M solution of LiCl to 1
If you dilute 175 mL of a 1.6 M solution of LiCl to 1.0 L, determine the new concentration of the solution. 0.28 M Question 1

3 Sea water contains roughly 28. 0 g of NaCl per every 1. 0 L
Sea water contains roughly 28.0 g of NaCl per every 1.0 L. What is the molarity of sodium chloride in sea water? 0.48 M Question 2

4 You need to make 10. 0 L of 1. 2 M KNO3
You need to make 10.0 L of 1.2 M KNO3. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it? 4.8 M Question 3

5 What is the molarity of 245 g of H2SO4 dissolved in 1.00 L of solution?
Question 4

6 You have 10. 0 mL of 5. 0 M copper(II) sulfate solution
You have 10.0 mL of 5.0 M copper(II) sulfate solution. How much solution will you have to achieve a 0.30 M copper(II) sulfate solution? 170 mL Question 5

7 What is the molarity of 5. 30 g of Na2CO3 dissolved in 400
What is the molarity of 5.30 g of Na2CO3 dissolved in mL solution? 125 M Question 6

8 If I add 25 mL of water to 125 mL of 0
If I add 25 mL of water to 125 mL of M NaOH solution, what will the molarity of the diluted solution be? 0.13 M Question 7

9 What is the molarity of 5.00 g of NaOH in 750.0 mL of solution?
Question 8

10 If I add water to 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the new solution be? 0.1 M Question 9

11 How many moles of Na2CO3 are there in 10 L of 2 M solution?
Question 10

12 How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?
Question 11

13 Question 12 How many moles of Na2CO3 are in 10 mL of a 2 M solution?
0.02 mols Question 12

14 I have 345 mL of a 1. 50 M NaCl solution
I have 345 mL of a 1.50 M NaCl solution. If I boil the water until the volume of the solution is mL, what will the molarity of the new solution be? 2.07 M Question 13

15 What weight (in grams) of H2SO4 would be needed to make 750. 0 mL of 2
What weight (in grams) of H2SO4 would be needed to make mL of 2.00 M solution? 147 g Question 14

16 How much water would I need to add to 500 mL of 2
How much water would I need to add to 500 mL of 2.4 M KCl solution to make a 1 M solution? 700 mL Question 15

17 What volume (in mL) of 18.0 M H2SO4 is needed to contain 2.45 g H2SO4?
Question 16

18 If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?? 0.033 M Question 17

19 How many grams of Ca(OH)2 are needed to make 100. 0 mL of 0
How many grams of Ca(OH)2 are needed to make mL of M solution? 1.85 g Question 18

20 If I leave 750 mL of 0.50 M sodium chloride solution uncovered on a windowsill and 150 mL of the solvent evaporates, what will the new concentration of the sodium chloride solution be? 0.63 M Question 19

21 What is the molarity of a solution made by dissolving 20
What is the molarity of a solution made by dissolving 20.0 g of H3PO4 in 50.0 mL of solution? 4.08 M Question 20

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