the order of cation concentration of CuSO4, BaSO4, CaSO4 from highest to lowest.
I believe it is
Cu+2 Ca+2 Ba+2
in descending order of solubility in water.
To determine the order of cation concentration for CuSO4, BaSO4, and CaSO4 from highest to lowest, we need to assess the solubility of each compound.
Solubility refers to the ability of a compound to dissolve in a given solvent, typically water. Compounds that are highly soluble will dissociate into their respective ions in water, resulting in a high cation concentration, whereas compounds that are sparingly soluble will yield a lower concentration of cations.
Let's consider the solubility rules for common sulfates:
1. Rule 1: Most sulfate (SO4^2-) salts are soluble, except for those formed with barium, calcium, lead(II), and strontium ions.
Based on the above solubility rule, we can conclude that CuSO4 is soluble since copper (Cu^2+) is not one of the ions mentioned in the exception. Therefore, CuSO4 will dissociate into Cu^2+ and SO4^2- ions in water.
On the other hand, BaSO4 and CaSO4 are both sparingly soluble due to Rule 1. BaSO4 will only slightly dissociate into Ba^2+ and SO4^2- ions, while CaSO4 will also only partially dissociate into Ca^2+ and SO4^2- ions.
Now, let's summarize the cation concentrations:
- CuSO4 will have the highest cation concentration because it is highly soluble and completely dissociates in water, yielding a high concentration of Cu^2+ ions.
- CaSO4 will have the second-highest cation concentration because it is sparingly soluble and partially dissociates, resulting in a lower concentration of Ca^2+ ions compared to CuSO4.
- BaSO4 will have the lowest cation concentration because it is sparingly soluble and only slightly dissociates, leading to the lowest concentration of Ba^2+ ions among the three compounds.
Therefore, the order of cation concentration from highest to lowest is: CuSO4 > CaSO4 > BaSO4.