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निम्नलिखित साम्यावस्था की अभिक्रिया के लिए अभिक्रिया का वेग नियम समीकरण (1) द्वारा दिया जाता है
`[Cu(NH_3)_4]^(2+)+H_2OhArr[Cu(NH_3)_3H_2O]^(2+)+NH_3`
`(dx)/(dt)=2.0xx10^(-4)[Cu(NH_3)_4^(2+).[H_2O]-3.0xx10^5`
`[Cu(NH_3)_3H_2O]^(2+).[NH_3]" "...(1)`
ज्ञात कीजिये
(i) अग्र एवं पश्च अभिक्रिया का वेग
(ii) अग्र एवं पश्च अभिक्रिया वेगो का अनुपात
(iii) अभिक्रिया किस दिशा में अधिक होगी

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अग्र अभिक्रिया का वेग
`=2.0xx10^(-4)[Cu(NH_3)_4]^(2+)[H_2O]`
पश्च अभिक्रिया का वेग `=3.0xx10^5[Cu(NH_3)_3H_2O]^(2+)[NH_3]`
(ii) `K_f=2.0xx10^(-4)," "K_b=3.0xx10^5" "[therefore` वेग (rate)=K(conc.)]
`therefore" " K_f/K_b=(2.0xx10^(-4))/(3.0xx10^5)`
`=6.6xx10^(-10)=K_c`
(iii) `thereforeK_c` का मान कम है अतः अभिक्रिया पश्च दिशा में अधिक होगी

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