[faizan]

 (CH3)3CBr  + H2O  --------> (CH3)3COH + HBr
 tertiary butyl bromide
The rate expression for this reaction is
  Rate = K [(CH3)3CBr]
The rate expression shows that reaction is independent of conc. of water because, being a solvent, it is present in very large excess. Such type of reactions have been named as pseudo first order reactions. Suppose we have a reaction in which solvent is other than water, can we call it a pseudo first order reaction or this term is only restricted for those reactions in which water acts as a solvent?

[DevaDevil]

what is your own reasoning? We will be able to guide you along

[juanrga]

Is the concentration of any solvent present in very large excess or not?

[fledarmus]

I'm not sure I understand what question you are asking. I see two possibilities:

A) If water is involved in the reaction and is also the solvent, it is a pseudo first order reaction. If the same reaction is carried out in a different solvent, would it still be a pseudo first order reaction?

B) If water is involved in the reaction and is also the solvent, it is a pseudo first order reaction. If a different reaction is carried out which has, let's say, methanol involved in the reaction, and the reaction is carried out in methanol, would that also be a pseudo first order reaction?

If either of these is in fact your question, can you now answer it based on the way I have rephrased it?

[faizan]

A) If water is involved in the reaction and is also the solvent, it is a pseudo first order reaction. If the same reaction is carried out in a different solvent, would it still be a pseudo first order reaction?

yes i thnk so

[faizan]

what is your own reasoning? We will be able to guide you along

i thnk we can also call it a pseudo first order reaction

[faizan]

B) If water is involved in the reaction and is also the solvent, it is a pseudo first order reaction. If a different reaction is carried out which has, let's say, methanol involved in the reaction, and the reaction is carried out in methanol, would that also be a pseudo first order reaction?

yes i thnk so

[DevaDevil]

you say "I think so" to both of fledarmus' questions. Which one is it that is asked?

[faizan]

Actually i wanna ask both the questions.
In (A) the reaction is same but solvent is changed
and in (B), he is talking about some other reaction and in a different solvent