Download presentation

Presentation is loading. Please wait.

Published byTeresa Wilson Modified over 4 years ago

1
% by Mass Another way to measure the concentration of a solution % by mass = mass solute x 100 mass solution Solution = solute + solvent

2
Example What is the % by mass of a solution with 3.6 g of NaCl dissolved in 100.0 g of water? % = (3.6 / 103.6) x 100 = 3.5% NaCl

3
Example #2 Find the percent by mass of NaCl in 450.0 mL of a 0.85 M NaCl solution. The density of the solution is 1.04 g/mL % by mass = mass solute x 100 mass solution Step 1: Find mass of solute (NaCl) Step 2: Find mass of solution Step 3: Calculate % by Mass

4
Finding Mass of Solute Find the percent by mass of NaCl in 450.0 mL of a 0.85 M NaCl solution. The density of the solution is 1.04 g/mL Find Mass of Solute: Given: 450.0 mL of solution 0.85 M Find: Moles of NaCl and Convert to Grams M: moles of solute (n)/ liters of solution (L) n = 0.38 mole NaCl Mass = 22 g NaCl

5
Finding Mass of Solution Find the percent by mass of NaCl in 450.0 mL of a 0.85 M NaCl solution. The density of the solution is 1.04 g/mL Find Mass of Solution: Given: 450.0 mL of solution Density of solution = 1.04 g/mL 450.0 mL 1.04 g = 468.0 g solution 1 mL

6
Finding % by Mass Find the percent by mass of NaCl in 450.0 mL of a 0.85 M NaCl solution. The density of the solution is 1.04 g/mL Mass of Solute: 22 g NaCl Mass of Solution: 468.0 g solution % by mass = mass solute x 100 mass solution (22g NaCl /468.0 g solution) x 100 = 4.7%

Similar presentations

© 2020 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google