Removal of chemicals can affect the reaction

So if water is removed, say, by adding a powerful dehydrating agent, the ethyl ethanoate has nothing to react with and the reverse reaction is prevented. The equilibrium tries to re-establish itself by producing more ethyl ethanoate and water. If we continue removing water, the forward reaction can proceed until all of the reactants are converted to the ester. 

The effects of changing conditions on a system at equilibrium can be predicted using Le Chatelier s Principle. 

If a system at equilibrium is disturbed by changing the conditions, the system will react in such away as to oppose the change. 

In other words, if something is done to the equilibrium system, the position of equilibrium will change in order to reduce or remove the effects of the disturbance, and to get back into balance. 

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