Answer:
potential or pontenz Hydrogen is the negative logarithm of molar hydrogen ion concentration.
Explanation:
potential Hydrogen or potenz Hydrogen stands for pH
potenz is in german
![{ \tt{pH = - log [H {}^{ + } ]}}](https://tex.z-dn.net/?f=%7B%20%5Ctt%7BpH%20%3D%20%20-%20%20log%20%5BH%20%7B%7D%5E%7B%20%2B%20%7D%20%5D%7D%7D)
The answer is D: Salt and Water
Here's a website with the answer and some cool reading:
http://history-world.org/archeology.htm