Solution Concentrations Percent by Mass by Mass Solution
Solution Concentrations Percent by Mass % by Mass= Solution = Solute + Solvent Mass of solute x 100 Mass of solution An aquarium must contain 13. 6 g Na. Cl per 100. 0 g of water. What is the percent by mass (m/m) of Na. Cl in the solution? Solute= 13. 6 g Solvent= 100. 0 g Solution= 13. 6 g + 100. 0 g = _____g
Percent by Mass (continued) You have a 650. 0 g of a KCl solution. If the percent by mass of the solute, KCl is 1. 25% (m/m), how many grams of solute are in the solution? How many grams of solvent are in the solution? Solute= X Solution= 650. 0 g %= 1. 25 Solvent=
Percent by Volume % by Volume = Volume of solute x 100 Volume of solution What is the percent by volume (v/v) of ethanol in a solution that contains 45 ml of ethanol dissolved in 145 ml of water? Solute= 45 ml ethanol Solvent= 145 ml water Solution= 45 ml + 145 ml = _____ml
Percent by Volume % by Volume = If you have 200. 0 m. L of a 35. 0% aqueous solution of ethanol, what volume of ethanol and water are in the solution? Solute= X Solution= 200. 0 ml % = 35. 0 Solvent=
Parts Per Million (ppm) One Million: 1, 000 1 ppm = 1 mg/L Mass of solute x 106 = ppm Mass of solution On calculator… 106 is 2 nd EE 6
Mass of solute x 106 = ppm Mass of solution If 25 grams of a chemical is dissolved in 75 grams of water, what is the concentration of the chemical in parts per million (ppm)? Solute= 25 g Solvent= 75 g Solution= 25 g + 75 g = _____g On calculator: 0. 25 x 2 nd EE 6 = 250, 000 ppm
Mass of solute x 106 = ppm Mass of solution Suppose 17 grams of sucrose is dissolved in 183 grams of water. What is the concentration of sucrose in ppm? Solute= 17 g Solvent= 183 g Solution= 17 g + 183 g = _____g
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