Question

What is an effective way to slow down or stop this reaction in aqueous solution?

NaOH(aq)+KCI(aq) -> NaCI (aq) +KOH (aq)

increase the pressure of the reaction mixture
increase the surface area of the reactants
add a catalyst to the reaction mixture
add a lot of water to the reaction mixture

Answer 1

Add a lot of water to the reaction mixture.

Step-by-step explanation:

The rate of the reaction is directly proportional to the concentration of the reactants.

So, adding a lot of water to the reaction mixture will decrease the concentration of the reactants. Thus, it slows down or stop the reaction.

• Pressure has no effect on the reaction since the reactants and products are in aqueous phase.

• Increasing the surface area of the reactants will increase the rate of the reaction.

• Add a catalyst to the reaction mixture will increase the rate of the reaction since it lowers the activation energy required to initiate the reaction.

So, the right choice is:

add a catalyst to the reaction mixture