Download presentation

1
**CALCULATING CONCENTRATION OF SOLUTIONS**

1. Mass Percent = (mass of solute/mass of solution)100 2. Parts per million = (mass of solute/mass of solution)106 3. Mass/volume percent = (mass of solute/mL solution)100 4. Volume percent = (mL solute / mL solution)100 5. Molarity = moles solute / L solution

2
**CALCULATING CONCENTRATION OF SOLUTIONS**

How many grams of a solution that is 32.7% by mass NaCl would contain 45.0 g of NaCl? Mass % = (mass of solute /mass of solution) 100 32.7 % = (45.0 g / x )100 x = 45.0 g / 0.327 x = mass of solution = 138 g

3
**CALCULATING CONCENTRATION OF SOLUTIONS**

How much solute is present in mL of a 14.7% (mass/volume) HCl solution? Mass/volume % = (masssolute/volumesolution) 100 14.7 % = (x / mL )100 x = (756.1 mL) x = mass of solute = 111g

4
**CALCULATING CONCENTRATION OF SOLUTIONS**

A 350 mL sample of drinking water was analyzed and found to contain g of sulfate salts. Calculate the concentration of sulfate salts in this water sample? Masswater = densitywater (Volumewater) = 1.00 g/mL (350 mL) = 350 g solution ppm = (masssolute/masssolution) 106 ppm = (0.0046g / 350 g ) 106 ppm = 13 ppm Use ppm for trace amounts of solute.

5
**PRACTICE PROBLEMS calculating the CONCENTRATION OF SOLUTIONS**

___1. How many grams of a 45.0 % Mg(OH)2 solution can be made from 7.00 g of solid Mg(OH)2? ___2. How many kilograms of a 6.8% KC2H3O2 solution will contain 5.3 moles of KC2H3O2? ___3. If g of a 25.0 % sucrose solution was prepared, how many grams of a 5.00% solution of sucrose would contain the same amount of sugar? 15.6 g 7.6 kg 673 g

Similar presentations

© 2024 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