Rate of reaction homework

There are different ways to determine the rate of a reaction. The method chosen usually depends on the reactants and products involved, and how easy it is to measure changes in them. The mean rate of reaction can be calculated using either of these two equations: [mean~rate~of~reaction = frac {quantity~of~reactant~used} {time~taken}]

The rate of a reaction is a measure of how quickly a reactant is used up, or a product is formed. Collision theory. For a chemical reaction to happen: A collision that produces a reaction is called a successful collision. The activation energy is the minimum amount of energy needed for a collision to be successful.

The change in mass of a reactant or product can be followed during a reaction. This method is useful when carbon dioxide is a product which leaves the reaction container. It is not suitable for hydrogen and other gases with a small relative formula mass, Mr. The units for rate are usually g/s or g/min.

Measuring volume. The change in volume of a reactant or product can be followed during a reaction. This method is useful when a gas leaves the reaction container. The volume of a gas is measured using a gas syringe, or an upside down burette or measuring cylinder. The units for rate are usually cm3 s-1 or cm3 min-1.