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The reaction of calcium carbonate with dilute hydrochloric acid (a) Calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, carbon dioxide and water - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Question 6
The reaction of calcium carbonate with dilute hydrochloric acid (a) Calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, carbon dioxi... show full transcript
Worked Solution & Example Answer:The reaction of calcium carbonate with dilute hydrochloric acid (a) Calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, carbon dioxide and water - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Step 1
Balanced Equation for the Reaction
Answer
The balanced equation for the reaction of calcium carbonate with dilute hydrochloric acid can be written as:
In this equation:
- LHS (Left Hand Side) contains calcium carbonate (CaCO₃) and hydrochloric acid (HCl).
- RHS (Right Hand Side) consists of calcium chloride (CaCl₂), water (H₂O), and carbon dioxide (CO₂).
The equation is balanced as there are equal numbers of each type of atom on both sides.
Step 2
Explain what the results show about the type of reaction occurring
Answer
The temperature change observed in the reaction from 25°C to 27°C indicates that the reaction is exothermic. An increase in temperature signifies that heat is being released into the surroundings as the reaction progresses. Therefore, we can conclude that the process is exothermic, releasing energy in the form of heat.