Answer: The chemical equation is written below.
Step-by-step explanation:
Decomposition reaction is defined as the chemical reaction in which a single large substance breaks down into two or more smaller substances.
We are given a chemical compound having formula
![Na_2SO_4.10H_2O](https://img.qammunity.org/2020/formulas/chemistry/middle-school/rjp434xzhupbg7x8x06k4erc6r4jyvduth.png)
The chemical equation for the decomposition of given hydrated salt follows:
![Na_2SO_4.10H_2O\xrightarrow{\Delta} Na_2SO_4+10H_2O](https://img.qammunity.org/2020/formulas/chemistry/middle-school/fh5nhef5mrrdokz7ovexwswli8j668c7o9.png)
The hydrated salt looses its water of crystallization and forms anhydrous salt.
Hence, the chemical equation is written above.