Question

As a catalyst is removed from the mixture the reaction rate will decrease becauseExplain why each change in conditions would affect the reaction rate of reaction when sodium metal reacts with chlorine gas to form NaCl?

As concentration increases the reaction rate will increase because​

As temperature decreases the reaction rate will decrease because​

As volume increases the reaction rate will decrease because​

As pressure decreases the reaction rate will decrease because​

As the surface area of a molecule is increased the reaction rate will increase because​

As a catalyst is removed from the mixture the reaction rate will decrease because​

Answer 1

In order for any reaction to happen between more than one reactant particles, the particles of reactants must first collide.

Increasing the concentration of a reactant increases the number of collisions between the reacting particles per second and therefore increases the reaction rate.

Temperature is proportional to the kinetic energy of the particles in a substance. At higher temperatures, particles collide more frequently and with greater intensity. This increases the number of collisions between the reacting particles per second and therefore increases the reaction rate.

The concentration of a gas depends on the pressure on the gas. Increasing the pressure of a gas increases its concentration. By forcing the gas particles into a smaller volume we can increase the pressure of the gas. Increasing the pressure of a gaseous reactant increases the number of collisions between the reacting particles per second and therefore increases the reaction rate.

As volume increases the molecules become far from each other, and the number of collisions between reacting particles per second will also reduce. So this decreases the reaction rate.

Surface area is the exposed matter of a solid substance. In a reaction, increasing the surface area of the solid-phase reactant increases the number of collisions per second and therefore increases the reaction rate.

A catalyst is a species that speeds up a chemical reaction without being chemically changed upon completion of the reaction. Collisions only result in reactions if the particles collide with enough energy to get the reactions started (i.e. to overcome the activation energy barrier). A catalyst provides an alternative pathway for the reaction - a pathway that has a lower activation energy. So, the addition of the catalyst increases the reaction rate. And the removal of catalyst reduces the reaction rate.