Question

State the visible change and give the equation for the reaction:

A coil of Mg is heated in steam

Answer 1

Visible change :

• The change which is visible to an observer during a chemical reaction is called visible change. For example, change in color, change in temperature, the evolution of a gas, etc.
• When a coil of Mg is heated in steam, white magnesium oxide and hydrogen gas are formed.

$$\begin{gathered} \mathrm{Mg}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\to \mathrm{MgO}\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ \mathrm{Magnesium}\mathrm{Steam}\mathrm{Magnesium}\mathrm{Hydrogen} \\ \mathrm{oxide} \end{gathered}$$