# Are there polyatomic ions in household items?

Detergents and soaps, the salts of long chain fatty acids are probably the best examples. These are certainly polyatomic. Of course, in the kitchen we commonly use bicarbonate of soda, $N a H C {O}_{3}$, (and other salts) as a raising agent. How does $N a H C {O}_{3}$ cause cakes and scones to rise?