Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?

The factor that does not affect the rate of reaction of CaCO₃ with HCI is the solubility of CaCO₃. When CaCO₃ reacts with HCI, it produces carbon dioxide, water, and calcium chloride. The rate of this reaction is affected by several factors, such as temperature, concentration of HCI, and surface area of CaCO₃. However, the solubility of CaCO₃ does not affect the rate of reaction because it is a solid and does not dissolve in the reaction mixture. In other words, the reaction rate depends on the number of collisions between CaCO₃ and HCI molecules, and the solubility of CaCO₃ does not influence this collision process. Therefore, it is safe to say that the solubility of CaCO₃ does not affect the rate of reaction of CaCO₃ with HCI.