 What is the molarity of a bleach containing 9.5 grams of NaOCl per liter of bleach?  How many grams of CaCl 2 would be dissolved in 0.75 L of water.

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Presentation transcript:

 What is the molarity of a bleach containing 9.5 grams of NaOCl per liter of bleach?  How many grams of CaCl 2 would be dissolved in 0.75 L of water to make a 1.5 M solution?

Unit 9, Day 3 Kimrey 13 December 2012

 Calculate the volume of diluted solutions

 Many solutions are not the desired molarity, so they must be diluted  Remember from yesterday: The more dilute a solution is, the weaker it is.  This is because there is more solvent added and the solution has a smaller molarity

 Concentrated solutions can be diluted by adding more water or solvent.  This can be calculated by the formula M 1 V 1 = M 2 V 2

 What volume of 12 M hydrochloric acid is needed to make 15 mL of a 4.5 M solution?

 If I add water to 90 mL of a 0.15 M NaOH solution until the final volume is 130 mL, what will the molarity of the diluted solution be?

 How much 5 M HCl solution can be made by diluting 350 mL of 7 M HCl?

 Note that V 2 is the TOTAL volume.  What if I asked how much water is added?

 How much water must be added to make a 5 M HCl solution from 350 mL of 7 M HCl?

 How much water must be added to make a 9 M NaOH solution from 500 mL of 12 M NaOH?

1)How many grams of potassium carbonate are needed to make 200 mL of a 2.5 M solution? 2)How many liters of 4 M solution can be made using 100 grams of lithium bromide? 3)What is the concentration of a 450 mL solution that contains 200 grams of iron (II) chloride?

4)How many grams of ammonium sulfate are needed to make a 0.25 M solution at a concentration of 6 M? 5)What is the concentration of a solution that has a volume of 2.5 L and contains 660 grams of calcium phosphate? 6)How many grams of copper (II) fluoride are needed to make 6.7 liters of a 1.2 M solution?