C6- rate of reaction

what is Activation energy?

the minimum energy needed for particles to react

what is a closed system?

a reaction in which no reactants or products can escape

what is the Collision theory?

all particles must collide with sufficient energy to react

what is a concentration?

amount of solute dissolved in a solvent

what is an equilibrium?

when the forwards rate of reaction equals the backwards rate of reaction

what is precipitate?

a solid formed when mixing two solutions

what is a product?

a chemical made during a reaction

what is rate of reaction?

speed at which a chemical reaction takes place

what is a reactant?

a chemical used up during a reaction

what is a reversible reaction?

when the products of a reaction can turn back into the reactants

what is a solution?

solute dissolved in a solvent

what is a successful collision?

collision between particles that will result in a chemical reaction

what is a tangent?

a straight line that touches the curve at a particular point

what is a yield?

the amount of product formed in a reaction

what is the formula for a mean rate of reaction in terms of reactants?

quantity of reactant used/time taken

what is the formula for a mean rate of reaction in terms of products?

quantity of product formed/time taken

how can you measure the quantity of a reactant or product?

In grams or in cm3

how could you measure the rate of reaction from a graph?

draw a tangent to the curve and calculate the gradient

what five factors can affect the rate of reaction?

temperature, surface area of a solid, concentration of reactants in solution, pressure of gases, catalyst

explain why increasing the surface area increases the rate of reaction

more particles are available to collide, therefore more frequent collisions between reactants

what is a catalyst?

substance that speeds up a reaction but remains chemically unchanged