I think it is called a Case study.
Hopefully it is correct! :)
Answer:
H20
Explanation:
Because without water you will die faster then without food
Answer:
• An acid is an electrolyte that hydrolyses in water to release hydrogen ions.

• pH level of an acid;
- Strong acid → 0 - 3.8
- Weak Acid → 4.0 - 6.7