Question

what happen when washing soda is exposed to air

Answer 1

When sodium carbonate crystals are exposed to air They lose water of crystallization and turn to white powder. This process of loosing water of crystallization when exposed to air is called efflorescence.

Answer 2

Explanation:

As the chemical formula of washing soda is $Na_{2}CO_{3}.10H_{2}O$. So, when we expose washing soda to air then it will readily lose its water of crystallization.

As a result, it will turn into white powder. Hence, this whole process of water of crystallization lost by washing soda on exposure to air is known as efflorescence.

Chemical reaction equation for this process is as follows.

     $Na_{2}CO_{3}.10H_{2}O \rightarrow Na_{2}CO_{3} + 10H_{2}O$