Which of the following has the highest conductivity
Pure Water |
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0.1 M Ba(OH)2 solution |
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0.5 M Ba(OH)2 solution |
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Air |
Which conductivity point is the equivalence point of the reaction?
H2SO4 +Ba(OH)2 à BaSO4 + 2 H2O
The lowest conductivity point |
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The highest conductivity point |
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The start point |
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None of above |
1. Conductivity is directly related to number of ions in solution. Pure water is an insulator.
0.1M Ba(OH)2 will have less ions than 0.5M Ba(OH)2 , thus conductivity of 0.5M Ba(OH)2 will be highest.
Option (c) is the correct answer .
2. Precipitation titration;
H2SO4(aq) + Ba(OH)2(aq) >>>> BaSO4(s) + 2H2O(l)
As the titration begins , the conductivity will decrease due to formation of BaSO4 solid . Conductivity will be minimum at equivalence point where all BaSO4 will formed .
After equivalence point, conductivity will rise sharply again.
Thus option (b) lowest conductivity point is the equivalence point of this titration.
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