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3.6 Molar Concentration

3.6 Molar Concentration. Molarity – A Useful Unit of Concentration Preparing a Standard Solution from a Solid Ions in Solution. 3.6 Molar Concentration. Molarity – A Useful Unit of Concentration. Concentration is any expression of the proportion of a chemical in a solution.

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3.6 Molar Concentration

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  1. 3.6 Molar Concentration • Molarity – A Useful Unit of Concentration • Preparing a Standard Solution from a Solid • Ions in Solution

  2. 3.6 Molar Concentration Molarity – A Useful Unit of Concentration Concentration is any expression of the proportion of a chemical in a solution. Molarity (M) is the number of moles of the chemical per litre of solution, e.g. 1.8 M HCl means 1.8 mol HCl per litre of solution. The molar concentration of a chemical is indicated by putting square brackets around the chemical’s formula, e.g. [HCl]. text pages 151-152

  3. 3.6 Molar Concentration Molarity – A Useful Unit of Concentration Examples: 0.50 L soln x 3.0 mol HCl = 1.5 mol HCl 1 L soln 1.5 mol HCl x 1 L soln = 0.50 L soln 3.0 mol HCl text pages 151-152

  4. 3.6 Molar Concentration Preparing a Standard Solution from a Solid A standard solution is a solution of known concentration text pages 153-154

  5. 3.6 Molar Concentration Preparing a Standard Solution from a Solid e.g. 0.25 L soln x 1.5 mol NaCl x 58.5 g NaCl = 22 g NaCl 1 L soln 1 molNaCl text pages 153-154

  6. 3.6 Molar Concentration Ions in Solution The dissociation equation provides the ratio of the released ions to each other and to their parent compound. text pages 155-157

  7. 3.6 Molar Concentration Ions in Solution e.g. 0.125 L soln x 1.5 mol CaCl2 x 2 mol Cl x 35.5 g Cl = 13 g Cl 1 L soln 1 mol CaCl21 mol Cl grams grams litres ions moles Formula units litres of soln moles litres of soln litres Chloride Cl Calcium chloride CaCl2 text pages 155-157

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