6.9.4

Titration Calculations

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Calculations of Titrations

We have seen before how to carry out titration calculations using titer values and balanced equations. We shall recap these calculations.

Information provided

Information provided

  • Before starting your calculation you will be given:
    • The balanced equation for the reaction.
    • The volume and concentration of the titer.
    • The volume of the other reactant.
  • You will, most often, be asked to find the concentration of this other reactant.
First step

First step

  • Calculate the moles of the titer using the two pieces of information we know about the titer: the volume and the concentration. Use the equation:
    • Moles = volume x concentration
Second step

Second step

  • Find the number of moles of the other component:
    • A titration is stopped at the exact point of neutralization so we can say that the mole ratio will be the same as in the balanced equation.
  • Examples:
    • If the mole ratio (from equation) is 1:1, the component will have the same number of moles as the titer.
    • If the mole ratio (from equation) is 2:1, the component will have twice as many moles as the titer.
Third step

Third step

  • Find the concentration of the other component:
  • We can rearrange the equation:
    • Moles = concentration x volume
  • To get:
    • Concentration = moles ÷ volume
Units

Units

  • Units are very important in titration calculations!
    • Moles → mol
    • Volume → L
    • Concentration → mol L−1
  • Forgetting to convert the volume from ml to L is where most people make mistakes!
    • 1 mL = 0.001 L
  • Sometimes volume is given in cm 3.
    • 1 cm 3 = 1 mL
Jump to other topics
1

Structure - Models of the Particulate of Matter

2

Structure - Models of Bonding & Structure

3

Structure - Classification of Matter

3.1

The Periodic Table: Classification of Elements

3.2

Periodic Trends

3.3

Group 1 Alkali Metals

3.4

Halogens

3.5

Noble gases, group 18

3.6

Functional Groups: Classification of Organic

3.7

Functional Group Chemistry

3.8

Alkanes

3.9

Alcohols

3.10

Halogenoalkanes

4

Reactivity - What Drives Chemical Reaction?

5

Reactivity - How Much, How Fast & How Far?

6

Reactivity - The Mechanisms of Chemical Change

7

Measurement, Data Processing & Analysis

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