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 ?

Question

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 ? (A) Act as dehydrating agent (B) Can absorb moisture from air (C) Tendency to form hydrate decreases from calcium to barium (D) All of the above

Tardigrade Admin · Accepted Answer

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.

Q. Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl2​⋅6H2​O, BaCl2​⋅2H2​O, SrCl2​⋅6H2​O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides ?

Act as dehydrating agent

Can absorb moisture from air

Tendency to form hydrate decreases from calcium to barium

All of the above

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 Ca2+ to Sr2+ due to increase in size and decrease in polarization power.

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 $C a^{2 +}$ to $S r^{2 +}$ due to increase in size and decrease in polarization power.