The Hill reaction lab aims to demonstrate the light-dependent reactions of photosynthesis, specifically the process of water splitting and electron transport.

Here's what is typically used in a Hill reaction lab:

* Chloroplasts: These are the organelles responsible for photosynthesis. They are extracted from plant leaves.

* Artificial Electron Acceptor: Instead of carbon dioxide, a compound like dichlorophenolindophenol (DPIP) is used. DPIP is a blue dye that turns colorless when it accepts electrons.

* Light: Light energy is essential to drive the reaction.

* Buffer solution: This helps maintain the pH of the reaction mixture.

Ammonia's role in plants:

Ammonia is a form of nitrogen that plants need for growth. It is used in the process of nitrogen fixation where nitrogen gas is converted into usable forms by certain bacteria. However, it is not involved in the Hill reaction.

In summary: While ammonia is important for plant growth, it is not a component of the Hill reaction lab.