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The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Question 1
The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction. Describe what is meant by the term endothermic reaction. (b) The... show full transcript
Worked Solution & Example Answer:The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Step 1
Describe what is meant by the term endothermic reaction.
Answer
An endothermic reaction is defined as a reaction that takes in or absorbs energy from its surroundings, particularly in the form of heat. In such reactions, the total energy required to break bonds in the reactants is greater than the energy released when new bonds are formed in the products. Thus, overall, the reaction absorbs heat, resulting in a decrease in the temperature of the surroundings.
Step 2
Step 3
Explain, in terms of particles, why increasing the concentration of the acid increases the rate of this reaction.
Answer
Increasing the concentration of the acid means there are more particles of acid present in the solution for the same volume. This results in a higher number of collisions between the acid particles and the magnesium ribbon, leading to more frequent successful collisions. As the frequency of collisions increases, the rate of reaction also increases, allowing the magnesium to react more quickly with the acid.