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Published byConstance Wilcox Modified over 8 years ago

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Examples-Molarity and Dilutions

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Example What is the molarity of a solution that contains 4.5 moles of sucrose in 0.750 L of water?

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Example Calculate the molarity of a solution prepared by dissolving.05 moles NaOH into enough water to make a 56.78 mL solution.

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You Try What is the molarity of a bleach solution containing 9.5 grams of NaOCl dissolved in 130 mL of water?

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Example How many grams of CaCl 2 would need to be dissolved in 0.75 L of water to make a 1.5 M solution?

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Example How many grams of NaOH do I need to make 250 mL of a 3.0 M solution

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Dilutions 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

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

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Example 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?

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Example How much 5 M HCl solution will be made by diluting 350 mL of 7 M HCl?

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

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

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

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