human
What symbol indicates a solid product, or precipitate, when one substance is formed from another substance during a chemical reaction?
gpt
The symbol that indicates a solid product, or precipitate, is represented by an arrow pointing downwards.
Explanation: In chemical equations and reactions, arrows are often used to show the progression of a reaction. An arrow pointing downwards (often depicted as ↓ or by a double line arrow) indicates that a substance in a previous step has been converted into a solid, known as the precipitate.