Question

What happens when $MgC{l}_2\cdot 6H_{2}O$ is heated?

• A. $MgC{l}_2\cdot 2H_{2}O$ is obtained
• B. Anhydrous $MgC{l}_2$ is obtained
• C. $MgC{l}_2\cdot 4H_{2}O$ is obtained
• D. All of the above

Answer 1

The correct option is A $MgC{l}_2\cdot 2H_{2}O$ is obtained

When $MgC{l}_2\cdot 6H_{2}O$ is heated, $MgC{l}_2\cdot 4H_{2}O$ is obtained. Four molecules of water (per molecule of hexahydrate) are lost. This is dehydration.