Photo AI
A small piece of a Group 1 metal is added to a trough of water - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2023 - Paper 10
Question 3
A small piece of a Group 1 metal is added to a trough of water. The metal floats, fizzes vigorously and melts to form a silvery ball. Which Group 1 metal was added... show full transcript
Worked Solution & Example Answer:A small piece of a Group 1 metal is added to a trough of water - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2023 - Paper 10
Step 1
Which Group 1 metal was added to the water?
Answer
The metal described is likely Sodium (D).
Reasoning: Sodium is a well-known Group 1 metal that reacts with water. When a small piece of sodium is added to water, it floats due to its lower density than water, and reacts vigorously, producing hydrogen gas and heat. The reaction is characterized by fizzing as the gas is released. The heat melted the sodium, causing it to form a silvery ball as it moves around the water's surface.
Other Group 1 metals like Potassium also react, but they are more vigorous and can ignite, which is not indicated in the question.