Concentration of Solution
- 2. Concentration of Solution refers to the relative amount of solute and solvent in a solution.
- 3. percent by volume, is the amount of solute in a given volume of solution expressed as grams solute per 100 milliliter of solution (g/100 mL), and percent by mass, is the amount of solute in a given mass of solvent expressed as grams solute per 100 grams of solution. Concentration of Solution is expressed as:
- 4. Sample problem 1 How many mL of ethyl alcohol are present in an 80 mL bottle of solution, with 70% concentration? 80ml 56 ml
- 5. This means that an 80ml total volume of solution with 70% concentration contains 56 ml of dissolved ethyl alcohol. Thus, only 24ml is water (solvent).
- 6. Sample problem 2 A one peso coin has a mass of 3.5 grams. How many grams of copper are in a one peso coin containing 75% copper by mass?
- 7. 75% by mass means 75 grams of copper in 100 grams of one peso coin. So, a 3.5 grams one peso coin contains, 3.5 2.63g
- 8. To get the percent concentration by volume/mass, we use this formula: ???? % = ???? ?? ?????? ???? ?? ???????? ? 100% ?????? % = ?????? ?? ?????? ?????? ?? ???????? ? 100%
- 9. Problem #3 Liza dissolved 10 ml food coloring in 40 ml water . What will be the percent concentration by volume of the solution? ?????? % = ?????? ?? ?????? ?????? ?? ???????? ? 100% ?????? % = 10?? 40?? ? 100% = 25%