ERUVCHANLIK KO’PAYTMASI

  Agar qattiq moddaning suvda erishi kuzatilsa va qattiq modda yomon erisa bu holatda ham erish jarayoni muvozanatda sodir bo’ladi.

                      CaSO_4 (q)  =  Ca²⁺ _(s)  +  SO₄ ^2-_(s)

                                    [Ca²⁺ ]_* [ SO₄ ^2-]

                             K= ------------------------

                                          [CaSO₄]

           Kasrning maxrajidagi     K_*  [CaSO₄]= K¹ o’zgarmas qiymat bo’lib uni

EK eruvchanlik ko’paytmasi deyiladi. EK-  haroratga bog’liq bolgan kattalik.

                                    EK= [Ca²⁺] *[SO₄^2-]= 2,25_*10^-4

         Juda ko’p moddalar uchun EK qiymati berilgan va u moddalarning  eruvchanligini baholashda ahamiyatga ega.