Dilutions_wksht - (0.75 M)(250 mL) = M 2 (295 mL) M 2 =...

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Dilutions Worksheet 1) If 45 mL of water are added to 250 mL of a 0.75 M K 2 SO 4 solution, what will the molarity of the diluted solution be? 2) If water is added to 175 mL of a 0.45 M KOH solution until the volume is 250 mL, what will the molarity of the diluted solution be? 3) How much 0.075 M NaCl solution can be made by diluting 450 mL of 9.0 M NaCl? 4) If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will the molarity of the solution be? 5) How much water would need to be added to 750 mL of a 2.8 M HCl solution to make a 1.0 M solution?
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Everett Community College does not discriminate on the basis of race, religion, creed, color, national origin, age, sex, marital status, disability, or veteran status. Dilutions Worksheet Solutions 1) If 45 mL of water are added to 250 mL of a 0.75 M K 2 SO 4 solution, what will the molarity of the diluted solution be?
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Unformatted text preview: (0.75 M)(250 mL) = M 2 (295 mL) M 2 = (0.75 M)(250 mL) = 0.64 M (295 mL) 2) If water is added to 175 mL of a 0.45 M KOH solution until the volume is 250 mL, what will the molarity of the diluted solution be? (0.45 M)(175 mL) = M 2 (250 mL) M 2 = (0.45 M)(175 mL) = 0.32 M (250 mL) 3) How much 0.075 M NaCl solution can be made by diluting 450 mL of 9.0 M NaCl? (9.0 M)(450 mL) = (0.075 M)V 2 V 2 = (9.0 M)(450 mL) = 54,000 mL = 54 L (0.075 M) 4) If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will the molarity of the solution be? (3.50 M)(550 mL) = M 2 (275 mL) M 2 = (3.50 M)(550 mL) = 7.0 M (275 mL) 5) How much water would need to be added to 750 mL of a 2.8 M HCl solution to make a 1.0 M solution? (2.8 M)(750 mL) = (1.0 M)V 2 V 2 = (2.8 M)(750 mL) = 2100 mL (1.0 M) 2100 mL – 750 mL = 1350 mL = 1.4 L...
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This note was uploaded on 10/04/2010 for the course CHEM 145 taught by Professor Prezhdo during the Fall '08 term at University of Washington.

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Dilutions_wksht - (0.75 M)(250 mL) = M 2 (295 mL) M 2 =...

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