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The equation shows the reaction of sodium with water - OCR Gateway - GCSE Chemistry: Combined Science - Question 2 - 2019 - Paper 3
Question 2
The equation shows the reaction of sodium with water. Sodium hydroxide and hydrogen are made. Two of the state symbols are missing. 2Na(s) + 2H₂O...... → 2NaOH(aq... show full transcript
Worked Solution & Example Answer:The equation shows the reaction of sodium with water - OCR Gateway - GCSE Chemistry: Combined Science - Question 2 - 2019 - Paper 3
Step 1
What are the missing state symbols?
Answer
In the reaction between sodium and water, sodium hydroxide is produced in an aqueous solution, and hydrogen is released as a gas. Therefore, the correct state symbols for the missing parts of the equation are:
- For water, it is in liquid form, represented as (l).
- For hydrogen gas, it is represented as (g).
Thus, the correct option is D: (l), (g).