Chemistry Coursework - Sodium Thiosulphate
Chemistry Coursework
Planning
Aim: To find the effect of concentration of thiosulphate on the rate of reaction between sodium thiosulphate and hydrochloric acid.
Introduction:
Word Equation for the reaction:
Balanced Symbol Equation for the reaction:
Observations during the reaction: • A yellow precipitate of Sulphur starts to form and the reaction mixture goes cloudy. • A colourless, poisonous gas of sulphur dioxide is given off. • Sodium Chloride (salt) and Water also form. The salt dissolves in the solution, and the water mixes in.
Rate of Reaction
The rate of a chemical reaction is a measure of change of given quantity with time.
There are two ways to measure the rate of a reaction: 1. measure the rate at which a reactant is used up 2. measure the rate at which a product is formed
Collision theory is used to explain how different factors affect the rate of chemical reaction. The collision theory states that for a reaction to take place between reacting particles (ions, molecules or atoms) it is necessary that they collide. Particles must also have a sufficient amount of energy to react. This minimum amount of energy which reacting particles must possess to reaction is called the activation energy. This energy is used to break bonds in the reacting particles in order that products can form. Without this activation energy, particles simply bounce off each other without reacting.
Chemical reactions can only happen if reactant particles collide with enough energy. The more frequently particles collide, and the greater the proportion of collisions with enough energy, the greater the rate of reaction.
Different reactions can happen at different rates. Reactions that happen slowly have a low rate of reaction. Reactions that happen quickly have a high rate of reaction.
The temperature, concentration, light, surface area of reacting solids, and the use of catalysts, are all factors which affect the rate of a
Planning
Aim: To find the effect of concentration of thiosulphate on the rate of reaction between sodium thiosulphate and hydrochloric acid.
Introduction:
Word Equation for the reaction:
Balanced Symbol Equation for the reaction:
Observations during the reaction: • A yellow precipitate of Sulphur starts to form and the reaction mixture goes cloudy. • A colourless, poisonous gas of sulphur dioxide is given off. • Sodium Chloride (salt) and Water also form. The salt dissolves in the solution, and the water mixes in.
Rate of Reaction
The rate of a chemical reaction is a measure of change of given quantity with time.
There are two ways to measure the rate of a reaction: 1. measure the rate at which a reactant is used up 2. measure the rate at which a product is formed
Collision theory is used to explain how different factors affect the rate of chemical reaction. The collision theory states that for a reaction to take place between reacting particles (ions, molecules or atoms) it is necessary that they collide. Particles must also have a sufficient amount of energy to react. This minimum amount of energy which reacting particles must possess to reaction is called the activation energy. This energy is used to break bonds in the reacting particles in order that products can form. Without this activation energy, particles simply bounce off each other without reacting.
Chemical reactions can only happen if reactant particles collide with enough energy. The more frequently particles collide, and the greater the proportion of collisions with enough energy, the greater the rate of reaction.
Different reactions can happen at different rates. Reactions that happen slowly have a low rate of reaction. Reactions that happen quickly have a high rate of reaction.
The temperature, concentration, light, surface area of reacting solids, and the use of catalysts, are all factors which affect the rate of a