1 / 5

CALCULATING CONCENTRATION OF SOLUTIONS

CALCULATING CONCENTRATION OF SOLUTIONS. 1. Mass Percent = (mass of solute/mass of solution)100 2. Parts per million = (mass of solute/mass of solution)10 6 3. Mass/volume percent = (mass of solute/mL solution)100 4. Volume percent = (mL solute / mL solution)100

dolph
Download Presentation

CALCULATING CONCENTRATION OF SOLUTIONS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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 756.1 mL of a 14.7% (mass/volume) HCl solution? Mass/volume % = (masssolute/volumesolution) 100 14.7 % = (x / 756.1 mL )100 x = 0.147 (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 0.0046 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 134.5 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

More Related