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Question -

Nitric oxide reacts with Br2 and gives nitrosylbromide as per reaction given below:

When 0.087 mol of NO and 0.0437 mol of Br2 are mixed in aclosed container at constant temperature, 0.0518 mol of NOBr is obtained atequilibrium. Calculate equilibrium amount of NO and Br2.



Answer -

Thegiven reaction is:

Now,2 mol of NOBr are formed from 2 mol of NO. Therefore, 0.0518 mol of NOBr areformed from 0.0518 mol of NO.

Again,2 mol of NOBr are formed from 1 mol of Br.

Therefore,0.0518 mol of NOBr are formed from molof Br, or

0.0259mol of NO.

Theamount of NO and Br present initially is as follows:

[NO] = 0.087 mol [Br2] = 0.0437 mol

Therefore,the amount of NO present at equilibrium is:

[NO]= 0.087 – 0.0518

=0.0352 mol

And,the amount of Br present at equilibrium is:

[Br2] = 0.0437 – 0.0259

=0.0178 mol


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