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Chemistry Solutions Molarity and Dilutions

Chemistry Solutions Molarity and Dilutions. CALCULATORS REQUIRED PERIODIC TABLES REQUIRED. Concentration. When an aqueous solution is made, the concentration of the solution can be measured in multiple ways.

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Chemistry Solutions Molarity and Dilutions

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  1. ChemistrySolutionsMolarity and Dilutions CALCULATORS REQUIRED PERIODIC TABLES REQUIRED

  2. Concentration • When an aqueous solution is made, the concentration of the solution can be measured in multiple ways. • The most common method of measuring concentration in chemistry is the use of molarity (M). • Example: 2.0 MHCl(aq) • “two molar hydrochloric acid solution”

  3. Molarity • Molarity is given by the following equation: • The more dissolved solute in the solution, the higher the concentration. • Solute = lesser quantity in a solution • Solvent = greater quantity in a solution • Salt water: salt is solute, water is solvent

  4. Molarity Problems 0.250 mol of sugar is dissolved in a 350 mL teacup filled with hot water. What is the molarity of the sugar solution? (Ignore the volume of the sugar) Determine the molarity of a solution made by dissolving 20.0 g of NaOH in sufficient water to yield a 482 mL solution.

  5. It’s much cheaper & more convenient to buy concentrated solutions and dilute them to whatever strength you want them. Dilution formula: M1V1 = M2V2 Initial molarity/volume: 1 Final molarity/volume: 2 Dilutions

  6. If you have to make 100 mL of a 1.0 M HCl solution for a class of 30 students, how much concentrated (12.0 M) HClshould you start with? Dilution Example

  7. Solid & liquid solutes do not change their solubility with a change in pressure. Gases, however, become more soluble under increased pressure Think of a pressurized soda can and how much gas escapes when you open it. Effects of Pressure on Solubility

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