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PSC 4012

PSC 4012. Ionic Phenomena: A study of an environmental problem. PSC 4012: Concentration, Mole & Molarity. Concentration: Amount of solute in a given amount of solution. PSC 4012: Concentration, Mole & Molarity. Concentration c: Concentration m: Mass of Solute (g)

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PSC 4012

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  1. PSC 4012 Ionic Phenomena: A study of an environmental problem

  2. PSC 4012: Concentration, Mole & Molarity Concentration: Amount of solute in a given amount of solution.

  3. PSC 4012: Concentration, Mole & Molarity Concentration c: Concentration m: Mass of Solute (g) v: Volume of Solution (L)

  4. PSC 4012: Concentration, Mole & Molarity Concentration

  5. PSC 4012: Concentration, Mole & Molarity Calculations Prepare 4 litres of solution by using 10g of solute. What would be the concentration of this solution? = 2.5 g/L

  6. PSC 4012: Concentration, Mole & Molarity Practice: Organize the following solutions in order of ascending concentration: S#1: 3g of sugar in 1L of solution S#2: 5g of sugar in 0.5L of solution S#3: 8g of sugar in 4L of solution S#4: 10g of sugar in 10L of solution 3 g/L 10 g/L 2 g/L 1 g/L 4 - 3 - 1 - 2

  7. PSC 4012: Concentration, Mole & Molarity Calculations Sabrina must prepare a solution for a physical science experiment . What mass of salt would she need to prepare 100 mL of solution with a concentration of 20 g/L is needed. m = (0.1 L) (20 g/L) m = 2 g

  8. PSC 4012: Concentration, Mole & Molarity Practice: Ex. 5.8 p. 5.15

  9. PSC 4012: Concentration, Mole & Molarity Mole

  10. PSC 4012: Concentration, Mole & Molarity Mole

  11. PSC 4012: Concentration, Mole & Molarity Mole

  12. PSC 4012: Concentration, Mole & Molarity Mole How many atoms in each situation? _A dozen of N atoms: 12 _A hundred atoms of O: 100 _A couple of atoms of F: 2 _A mole of Li atoms: 6.02 * 1023

  13. PSC 4012: Concentration, Mole & Molarity Mole A mole of anything, is a fixed amount of that item, and it corresponds to Avogadro’s number: 6.02 * 1023 _A mole of houses: 6.02 * 1023 houses _A mole of cars: 6.02 * 1023 cars _A mole of molecules: 6.02 * 1023 molecules

  14. PSC 4012: Concentration, Mole & Molarity Molar mass: The mass of one mole of a given substance Example: What is the molar mass of water? Water = H2O (2H and 1O) Atomic mass of H = 1 Atomic mass of O = 16 g Molar mass of H2O= (1 + 1 + 16) = 18 g

  15. PSC 4012: Concentration, Mole & Molarity Practice: Determine the molar mass of the following substances: H2 H3PO4 Mg(OH)2 2 g 98 g 58.3 g

  16. PSC 4012: Concentration, Mole & Molarity Calculations How many moles are there in 500 g of calcium carbonate? 1- calcium carbonate = CaCO3 2- molar mass of CaCO3 = [(1*40)+(1*12)+(3*16)]g molar mass of CaCO3 = 100 g 3- 100 g = 1 mol 500 g = X (mol) 4- X = 5 mol

  17. PSC 4012: Concentration, Mole & Molarity Calculations What is the mass of 0.5 moles of magnesium bromide? 1- magnesium bromide = MgBr2 2- molar mass of MgBr2 = [(1*24.3)+(2*80)]g molar mass of MgBr2 =184.3 g 3- 184.3 g = 1 mol X (g) = 0.5 mol 4- X = 92.15 g

  18. PSC 4012: Concentration, Mole & Molarity Practice: Ex. 5.17 (a, b, g, h) p. 5.23 – 5.24

  19. PSC 4012: Concentration, Mole & Molarity Molar concentration = Molarity c: Concentration or M (M = mol / L) n: number of moles of Solute (mol) v: Volume of Solution (L)

  20. PSC 4012: Concentration, Mole & Molarity Calculations What would be the molar concentration of an 800 ml solution containing two moles of sodium chloride? = 2.5 mol/L = 2.5 M

  21. PSC 4012: Concentration, Mole & Molarity Practice: Organize the following solutions in order of ascending molar concentration: S#1: 3 mol of salt in 1L of solution S#2: 5 molof salt in 500mL of solution S#3: 4 molof salt in 2L of solution S#4: 0.1 mol of salt in 100mL of solution 3 mol/L 10 mol/L 2 mol/L 1 mol/L 4 - 3 - 1 - 2

  22. PSC 4012: Concentration, Mole & Molarity Calculations Sabrina must prepare a solution for a physical science experiment . What mass of sodium chloride would she need to prepare 750 mL of solution with a molar concentration of 2 M?

  23. PSC 4012: Concentration, Mole & Molarity Practice: Ex. 5.22 p. 5.29

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