1.

In an experiment addition of 10ml of 0.05 M BaCl_2 to 20ml of As_2S_3 sol causes coagulation in 1 hr. If the coagulation value of Ba^(+2) ion is x^2 then x = ___?

Answer»


Solution :`m = (n xx 1000)/(V) , n = (0.05 xx 10)/(1000) = 5 xx 10^(-4)`
`20 rarr 5 xx 10^(-4) , 1000 to ?`
`0.025 " mole"` = 25 milimole = `X^2 , x = 5`


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