Yes, adding anhydrous sulfate to water will result in a chemical reaction. However, "anhydrous sulfate" is not a specific compound. It refers to the absence of water molecules in a sulfate salt.

To understand the reaction, we need to know which specific sulfate salt you're referring to. Here are some examples:

* Anhydrous Copper Sulfate (CuSO₄): This will dissolve in water, forming hydrated copper sulfate (CuSO₄·5H₂O), also known as blue vitriol. The reaction is exothermic, meaning it releases heat.

* Anhydrous Sodium Sulfate (Na₂SO₄): This will also dissolve in water, forming a solution of sodium and sulfate ions. The reaction is less exothermic than with copper sulfate.

* Anhydrous Calcium Sulfate (CaSO₄): This is the main component of plaster of Paris. When mixed with water, it undergoes a hydration reaction, forming gypsum (CaSO₄·2H₂O), a solid. This reaction is exothermic and results in a hardening process.

In general, when anhydrous sulfates are added to water, they undergo a hydration reaction. This means that water molecules attach to the sulfate ions, forming hydrated sulfate ions. The extent of this reaction and the resulting solution properties depend on the specific sulfate salt used.