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Application of Gay-Lussac’s Law of Combining Volumes

Gay Lussac’s of combining volumes states that gases react in simple ratio with one another and to volumes of the products provided that temperature and pressure remain constant. In this article, you will understand how to apply this law in calculation by studying the following examples below: 1.     2H 2 + O 2 → H 2 O In the reaction above, what volume of hydrogen would be left over when 300cm 3 of oxygen and hydrogen are exploded in a sealed tube?   1cm 3 of oxygen = 2cm 3 of hydrogen 300cm 3 of oxygen = 2 x 300 = 600cm 3 Volume of left over = 1000 – 600 = 400cm 3 2.     Calculate the volume of carbon (II) oxide required to react with 40cm 3 of oxygen. 2CO + O 2 → 2CO 2 1cm 3 of oxygen = 2cm 3 of CO 40cm 3 of oxygen = 2 x 40 = 80cm 3 3.     Calculate the volume of residual gases that would be produced when 100cm 3 of sulphur (IV) oxide reacts with 20cm 3 of oxygen    2SO 2 + O 2 → 2SO 3...
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Logarithms

 

   Logarithm to a certain base of a number is equal to the power to which the base must be raised to give the number.

                  M = Xa

                  Logx M = a

                 4 = 22 

                 Log24 = 2

Evaluate the following logarithms

1.    Log10  10000

2.    Log4   1/16

3.    Log100  0.00001

                                             Solution

1.     Log10 10000

X  = 10000              

10x  =  104

X  = 4

2.    Log4 1/16

X  =  log4 1/16

4x  = 16-1

22x  = (24)-1

2x  = -4

X  -4/2

X = -2

3.     Log100  0.00001

X = log100 0.00001

100x   = 10-5

102x  = 10-5

2x    = -5

X = -5/2

 

 

 

 

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Application of Gay-Lussac’s Law of Combining Volumes

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