Question

is ferrous sulfate mixture or a substance?

Answer 1

Ferrous sulfate is a greenish or yellow-brown crystalline solid, denotes a range of salts with the formula FeSO4·xH2O. These compounds exist most commonly as the heptahydrate (x = 7) but are known for several values of x. The hydrated form is used medically to treat iron deficiency, and also for industrial applications.