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Solids & Crystal Structures

Solids & Crystal Structures. Crystal Structures. Hexagonal. cubic. Unit Cells in the Cubic Crystal System. Coordination number 8 12 6

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Solids & Crystal Structures

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  1. Solids & Crystal Structures

  2. Crystal Structures

  3. Hexagonal cubic

  4. Unit Cells in the Cubic Crystal System

  5. Coordination number 8 12 6 Number of atom per unit cell 2 4 1

  6. Atomic radius in cubic cells 2r = s 4r = s √24r = s √3

  7. Silver metal crystallize in a face centered cubic cell with edge of the unit cell having a length 0.407nm. Calculate the atomic radius of silver

  8. The ionic radii of Na + and Cl - are 99 and 181 pm respectively what is the length of the unit cell of NaCl (unit cell of NaCl is given in the picture)

  9. Solution Concentrations Mass of solute Percent by mass = ------------------------ x 100 Mass of solution Volume of solute Percent by volume = ------------------------- x 100 Volume of solution Mass of solute Mass / volume percent = --------------------- x 100 (gr/100ml) Volume of solution

  10. Solution Concentrations • Number of moles of solute • Molarity = ----------------------------------------------- • Number of liters of solution • Number of moles of solute • Molality = -------------------------------------------------- • Number of kilograms of solvent • Moles of component i • Mole fraction = --------------------------------------------------------- • total moles of all solution components • Parts per million (ppm), Parts Per Billion(ppb) • mg solute g solute • 1 ppm = -------------------- 1 ppb = ----------------------- • kg solution kg solution

  11. question. A solution has a density of 1.235g/ml and contains 90.0% glycerol C3H8O3 and 10% H2O by mass. Determine a- the molarity of C3H8O3 b- the molarity of H2O c- mole fraction of C3H8O3 d- mole percent of H2O e- the molality of H2O

  12. question. • A solution has a density of 1.235g/ml and contains 90.0% glycerol C3H8O3 and 10% H2O by mass. Determine • a- the molarity of C3H8O3 • b- the molarity of H2O • c- mole fraction of C3H8O3 • d- mole percent of H2O • e- the molality of H2O

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