1. Tardigrade
  2. Question
  3. Chemistry
  4. Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl2 ⋅ 6H2O, BaCl2 ⋅ 2H2O, SrCl2 ⋅ 6H2O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides ?

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Q. Dehydration of hydrates of halides of calcium, barium and strontium i.e., $CaCl_2 \cdot 6H_2O$, $BaCl_2 \cdot 2H_2O$, $SrCl_2 \cdot 6H_2O$, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides ?

The s-Block Elements

Solution:

Halides of calcium, barium and strontium act as dehydrating agent as they are hygroscopic in nature. They absorb moisture. Also they have tendency to form hydrate which decreases from $Ca ^{2+}$ to $Sr ^{2+}$ due to increase in size and decrease in polarization power.