1 / 8

THE MOLE

THE MOLE. Molarity January 14, 2009 (adapted from Mrs. J’s website). Very Important to Know!. 1000 ml = 1 L g/1 mol = molar mass = priodic table Multiply  subscripts = yes Coefficients = NO. substance being dissolved. total combined volume. A. Molarity.

leo-sloan
Télécharger la présentation

THE MOLE

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. THE MOLE Molarity January 14, 2009 (adapted from Mrs. J’s website)

  2. Very Important to Know! • 1000 ml = 1 L • g/1 mol = molar mass = priodic table • Multiply  subscripts = yes Coefficients = NO

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

  4. A. Molarity 2M HCl What does this mean?

  5. MASS IN GRAMS MOLES NUMBER OF PARTICLES LITERS OF SOLUTION B. Molarity Calculations 6.02  1023 (particles/mol) molar mass (g/mol) Molarity (mol/L)

  6. Steps for Solving Molarity problems • Measure the mass or the mass will be given (in grams – g). This is the solute. • Determine the molar mass of the solute. • Where do you find molar mass? • What are the units and per how many moles? • Calculate the moles of the solute. • Add the water. This is the solvent and is also the volume of the molarity calculation. • Solute from step 1 dissolved insolvent from step 4 = solution • measurement’s final unit needs to be in Liters! • Molarity = mol solute / Liters of solution or M = mol / L

  7. M = B. Molarity Calculations • 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 = 0.95M NaF

  8. B. Molarity Calculations • How many grams of NaCl are required to make 0.500L of 0.25M NaCl? 0.500 L 0.25 mol 1 L 58.44 g 1 mol = 7.3 g NaCl

More Related