Consider three metal chlorides x , y and z, where x is water soluble at room temperature, y is sparingly soluble in water at room temperature and z is soluble in hot water. x , y and z are respectively

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Metal chloride solubility characteristics: x must be water soluble at room temperature, y must be sparingly soluble at room temperature, and z must be soluble in hot water but not in cold water. CuCl₂ is highly soluble in water (x). AgCl is notoriously insoluble in water and sparingly soluble at any temperature, classifying it as sparingly soluble (y). PbCl₂ exhibits unusual solubility behavior—it is sparingly soluble in cold water but its solubility increases with temperature, making it soluble in hot water (z). T