If a system at equilibrium has additional reactant added, how does the system respond to re-establish balance?

Answer

The equilibrium shifts toward the product side.

Adding excess reactant increases the concentration on the reactant side, causing the system to consume that excess by driving the reaction forward to produce more products.

If a system at equilibrium has additional reactant added, how does the system respond to re-establish balance?

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Le Chatelier's Principle

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