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本文以电导法测定了12－磷钨、12－硅钨酸在一些醇、酯、醛、酮等含氧有机溶剂以及乙腈中的离解常数，得到的结果表明，两种酸在同种溶液中的离解常数接近，磷钨酸的略高，同一种酸在不同溶剂中的离解常数则与溶剂的介电常数有密切关系。在醚中，因杂多酸与溶剂发生缔合作用，用电导法得不到其离解常数。
In this paper, the dissociation constants of 12-Tungsten, 12-silicotungstic acid in some organic solvents such as alcohols, esters, aldehydes and ketones and acetonitrile were determined by conductivity method. The results show that the two acids are in the same solution Of the dissociation constant is close to slightly higher phosphotungstic acid, the same acid dissociation constant in different solvents and the solvent is closely related to the dielectric constant. In the ether, due to heteropolyacid and solvent association, the use of conductivity method can not get the dissociation constant.