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Fahrenheit vs' Centigrade

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... Celsius are 68 degrees Fahrenheit? ... are Celsius and Fahrenheit temperatures. equal? ... gravity (SG)= density relative to water, Since the density of ... – PowerPoint PPT presentation

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Title: Fahrenheit vs' Centigrade


1
  • Fahrenheit vs. Centigrade

2
  • Celsius (Fahrenheit - 32) x 5/9
  • Fahrenheit (Celsius x 9/5) 32

3
  • How many degrees Celsius are 68 degrees
    Fahrenheit?
  • replace Fahrenheit with 68 and solve for
    CelsiusC (68 - 32) x 5/9,C 36 x 5/9,C
    2020 C 68 F
  • At what temperature are Celsius and Fahrenheit
    temperatures
  • equal?
  • replace both temperatures with "T" in one of the
    equations above
  • and just solve for T
  • T T x 9/5 32,-32 T T x 9/5,-32 T x
    4/5,-40 T-40 C -40 F

4
Aqueous Solutions
5
Concentration Based on Volume
  • Molarity (M) the number of moles of solute per
    liter of solution
  • wtg ? MWmoles
  • 1 mmole 10-3 moles 1 mM
  • 1 ?mole10-6 moles 1 ?M
  • 1 nmole10-9 moles 1 nM
  • 1 pmole10-12 moles 1 pM

6
Concentration Based on Volume
  • Activity (a) the effective or apparent molarity
    of a solute
  • a ? M
  • Normality (N) the number of equivalents of
  • solute per liter of solution
  • wtg?EWequivalents
  • EWMW ? n

7
Concentration Based on Volume
  • Molarity and normality are related by
  • N nM

8
Concentration Based on Volume
  • Weight/Volume Percent ( w/v)
  • Milligram Percent (mg)

9
Concentration Based on Volume
  • Osmolarity the molarity of particles in solution

10
Concentration Based on Weight
  • Weight/Weight Percent ( w/w)
  • - Density (?) weight per unit volume
  • Specific gravity (SG) density relative to water,
    Since the density of water is 1 g/ml, specific
    gravity is numerically equal to density
  • wtgvolml x ? g/ml x (as decimal)

11
Concentration Based on Weight
  • Vol. wt ? ? x

12
Concentration Based on Weight
  • Molality (m) the number of moles of solute per
    1000 g of solvent
  • Osmolality?

13
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14
  • Fahrenheit vs. Centigrade

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  • Fahrenheit vs. Centigrade

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  • Fahrenheit vs. Centigrade

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  • Fahrenheit vs. Centigrade
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