Рассчитайте константу гидролиза по 1 ступени для CoCl2 СоCl2+HOH=CoOHCl+HCl Со⁺² +Н⁺+ОН⁻⇔ СоОН⁺ +Н⁺ Kг=([HCl]*[Co(OH)Cl]) / [CoCl2]
CoCl₂+H₂O⇄CoOHCl+HCl Co²⁺ + 2Cl⁻ + HOH⇄CoOH⁺ + Cl⁻ + H⁺ + Cl⁻ Co²⁺ + HOH⇄CoOH⁺ + H⁺ Рассчитаем константу гидролиза : Преобразуем: Ответ: 2.5*10⁻¹⁰
![K= \frac{[H^+] *[CoOH^+]}{[Co^2^+]}](https://tex.z-dn.net/?f=K%3D+%5Cfrac%7B%5BH%5E%2B%5D+%2A%5BCoOH%5E%2B%5D%7D%7B%5BCo%5E2%5E%2B%5D%7D+ "K= \frac{[H^+] *[CoOH^+]}{[Co^2^+]}")
![K= \frac{[H^+] *[CoOH^+]}{[Co^2^+]} * \frac{[OH^-]}{[OH^-]}= \frac{Kw}{K_d_2_(_C_o_(_O_H_)__2}}= \frac{10^-^1^4}{4*10^-^5}=2.5*10^-^1^0](https://tex.z-dn.net/?f=K%3D+%5Cfrac%7B%5BH%5E%2B%5D+%2A%5BCoOH%5E%2B%5D%7D%7B%5BCo%5E2%5E%2B%5D%7D+%2A++%5Cfrac%7B%5BOH%5E-%5D%7D%7B%5BOH%5E-%5D%7D%3D+%5Cfrac%7BKw%7D%7BK_d_2_%28_C_o_%28_O_H_%29__2%7D%7D%3D+%5Cfrac%7B10%5E-%5E1%5E4%7D%7B4%2A10%5E-%5E5%7D%3D2.5%2A10%5E-%5E1%5E0+ "K= \frac{[H^+] *[CoOH^+]}{[Co^2^+]} * \frac{[OH^-]}{[OH^-]}= \frac{Kw}{K_d_2_(_C_o_(_O_H_)__2}}= \frac{10^-^1^4}{4*10^-^5}=2.5*10^-^1^0")