Download presentation

Presentation is loading. Please wait.

Published byGwendoline Marsh Modified over 7 years ago

1
III. Molarity Topic 9 The Mole

2
A. Molarity Concentration of a solution. total combined volume substance being dissolved

3
A. Molarity 2M HCl What does this mean? You would read this as Hydrochloric acid with a Molarity of 2.

4
molar mass (g/mol) 6.02 10 23 (particles/mol) MASS IN GRAMS MOLES NUMBER OF PARTICLES LITERS OF SOLUTION Molarity (mol/L) Aqueous solution molar mass (g/mol) 6.02 10 23 (particles/mol) molar mass (g/mol) MOLES NUMBER OF PARTICLES MASS IN GRAMS Conversion Factors: We are really just adding one more of them.

5
Ex 1). What is the molarity of a solution containing 0.32 moles of NaCl in 3.4 liters? molarity =0.32 moles NaCl 3.4 L =0.094 M NaCl

6
Ex 2). Find the molarity of a 250 mL solution containing 10.0 g of NaF. 10.0 g 1 mol 41.99 g = 0.238 mol NaF 0.238 mol 0.25 L M == 0.95M NaF

7
Ex 3). How many grams of NaCl are required to make 0.500L of 0.25M NaCl? 0.500 L0.25 mol 1 L = 7.3 g NaCl 58.44 g 1 mol

8
How would you prepare 400. ml of 1.20 M solution of sodium chloride? Remember:1.20 M NaCl =1.20 moles NaCl 1.00 L solution0.400 L solution x1.20 moles NaCl 1.00 L solution=0.480 moles NaCl0.480 moles NaCl x58.5 g NaCl 1 mole NaCl=28.1 g NaCl Dissolve 28.1 g NaCl in enough water to make 400 mL of solution.

Similar presentations

© 2023 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