What is the word equation for

anhydrous copper (2) sulphate and water

Explanation:

When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead - the top one pointing right, and the bottom one pointing left.

For example:

ammonium~chloride \rightleftharpoons ammonia + hydrogen~chloride

NH_{4}Cl(s) \rightleftharpoons NH_{3}(g) + HCl(g)

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