Question

Which of the following will give anhydrous $MgC{l}_2$ from hexahydrate?

• A. Hexahydrate is heated to 175 deg in vacuum
• B. The double salt $MgC{l}_2\cdot N{H}_{4}Cl\cdot 6H_{2}O$ is evaporated to dryness and ignited
• C. The crystals of hexahydrate are dehydrated in a current of dry $HCl$ gas
• D. All of the above

Answer 1

The correct option is D All of the above

All of the following will give anhydrous $MgC{l}_2$ from hexahydrate.
(A) Hexahydrate is heated to 175 deg in a vacuum.
(B) The double salt $MgC{l}_2\cdot N{H}_{4}Cl\cdot 6H_{2}O$ is evaporated to dryness and ignited
(C) The crystals of hexahydrate are dehydrated in a current of dry $HCl$ gas.