Question

One-half gram of solid calcium sulfate, CaSO_4 (s), is added to 1.0 L of pure water. Immediately, the solid begins to dissolve according to the following reaction: CaSO_4(s) reversible Ca^2+ + SO_4^2- What is the concentration of dissolved sulfate in the water once equilibrium is achieved

Answer 1

The concentration of dissolved sulfate in the water can be determined using the solubility product constant (Ksp) for calcium sulfate.

Step-by-step explanation:

When solid calcium sulfate (CaSO4) is added to pure water, it dissociates into calcium ions (Ca2+) and sulfate ions (SO42-). The concentration of dissolved sulfate in the water once equilibrium is achieved can be determined by using the solubility product constant (Ksp) for calcium sulfate. The Ksp expression for calcium sulfate is [Ca2+][SO42-]. By determining the solubility of calcium sulfate and using stoichiometry, we can find the concentration of sulfate ions in the water at equilibrium.