Concentration of solutions

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Presentation transcript:

Concentration of solutions p. 237 – KCQ Target: I can calculate molarity and perform dilution calculations to be used in kinetics problems

Vocabulary Solute = the thing that is dissolving (What you have less of) Solvent = what it is dissolving IN (What you have more of) Solution = solute + solvent

What happens at the molecular level? Random motion of molecules causes mixing The solvent molecules surround the solute molecules, in a process called solvation. http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/thermochem/solutionSalt.html

Molarity M = moles of solute liters of solution Example: What is the molarity of 5 moles of iodine dissolved in 50 liters of water?

2 fish / 2 Liter 2 fish / 4 Liter Molarity looks at the number of solute particles / volume of solution

Making Solutions with a Certain Concentration M1V1 = M2V2 Example: How many milliliters of 3M NaOH do you need to make 45 mL of a 1.85M NaOH solution?