Adding reactants to a system at equilibrium will shift the equilibriumTo the leftTo the rightNot at all

Adding reactants to a system at equilibrium will shift the equilibrium to the right. This is due to Le Chatelier's principle, which states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Here are the steps to understand this:

1. A system at equilibrium is a system where the rate of the forward reaction equals the rate of the reverse reaction.

2. When you add more reactants to the system, you disturb the equilibrium.

3. According to Le Chatelier's principle, the system will try to counteract this disturbance. In this case, it can do so by consuming the added reactants.

4. The way for the system to consume the added reactants is to shift the equilibrium to the right, towards the products side. This increases the rate of the forward reaction, which uses up the added reactants.

5. Therefore, adding reactants to a system at equilibrium will shift the equilibrium to the right.