Lesson Objective
Download
1 / 11

Lesson Objective Calculate the concentration of solutions in units of molarity - PowerPoint PPT Presentation


  • 123 Views
  • Uploaded on

Lesson Objective Calculate the concentration of solutions in units of molarity Calculate the dilution of solutions in units of molarity. Solutions are made in various concentrations Concentration depends on the amount of solute dissolved in a given amount of solvent

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Lesson Objective Calculate the concentration of solutions in units of molarity' - chin


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Lesson Objective

  • Calculate the concentration of solutions in units of molarity

  • Calculate the dilution of solutions in units of molarity


  • Solutions are made in various concentrations

  • Concentration depends on the amount of solute dissolved in a given amount of solvent

    • Molarity (M) – number of moles of solute dissolved in one liter of the solution

      • Units of mol/L or M

        Ex) 2 mol/L = 2 M

      • The higher the molarity, the more concentrated the solution

  • Molarity

By Leridant[CC-BY-SA-2.5]

Decreasing Concentration


  • Convert given units, if necessary, before plugging into the molarity equation

    • Mass to moles

    • Volume to liters

Ex) 2 M solution of NaOHdescribes a solution in which every liter of solution contains 2 moles of NaOH

  • Calculating Molarity


  • Write unknown and givens

    V = 500. mL

    m= 102 g

    Molar mass = 58.44 g/mol

    M = ?

  • Identify the formula and rearrange, if needed

Ex) What is the concentration of a 500. mL salt solution containing 102 g of NaCl? (Molar mass of NaCl = 58.44 g/mol)

  • Convert units and find intermediates, if needed

  • Plug in and solve

  • Make sure the answer is reasonable


What is the molarity of an aqueous solution containing 40.0 g of glucose (C6H12O6) in 1.5L of solution?

  • Molarity Calculation


How many grams of NaOH are present in a 2.5 M solution?

  • Molarity Calculation


  • Dilution – process of decreasing the concentration of a solution by adding additional solvent

    • Number of solute particles does not change, but the amount of solvent is increased

    • Adding solvent increases the overall volume of the solution and decreases the concentration

      • Inversely proportional relationship between concentration and volume of solvent in a solution

  • Dilution


  • Dilution Formula


  • Write unknown and givens

    M1 = 2.0 M

    V1 = 1.5 L

    V2 = 4.0 L

    M2 = ?

  • Identify the formula and rearrange, if needed

Ex) A 2.0 M solution of acid is diluted by increasing its volume from 1.5 L to 4.0 L. Calculate the molarity of the new solution.

  • Convert units and find intermediates, if needed

  • Plug in and solve

    5. Make sure the answer is reasonable


What volume of a 3.00 calculationsM KI stock solution would you use to make 0.300 L of a 1.25M KI solution?

  • Dilution Calculation



ad