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Question

The equivalent mass of a certain bivalent metal is 25 g. The gram molar mass of its anhydrous chloride is:
  1. 51 g
  2. 79 g
  3. 121 g
  4. 34 g


Solution

The correct option is C 121 g
Let the metal that reacts be M
The metal is bivalent, the gram molar mass =2×25=50 g
A bivalent metal forms a chloride that has the formula MCl2
Molar mass of the metal chloride =50+(2×35.5)=121 g

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