Is calcium oxalate, CaC2O4, soluble in water?
Not very. It has a Ksp.
To determine if calcium oxalate (CaC2O4) is soluble in water, we can refer to solubility rules or solubility product constant (Ksp) values.
First, let's check the solubility rules for oxalate compounds. According to general solubility rules, most oxalate compounds, including calcium oxalate, are insoluble or only slightly soluble in water. However, there are exceptions to these rules, so we should also consider Ksp values for more accurate information.
The Ksp value for calcium oxalate can be found in a reference book or online database. After searching, we find that the Ksp for calcium oxalate is approximately 2.3 x 10^-9.
Comparing this Ksp value to the criteria for solubility, we can conclude that calcium oxalate is indeed sparingly soluble in water, as the Ksp is very small.
Therefore, to answer the question, calcium oxalate (CaC2O4) is generally considered insoluble in water, although it does have low solubility.