Answer:
If the liver is placed in an acidic solution, then the reaction rate will decrease.
All three of the phosphate groups have a negative charge and since they are all connected to each other by a carbon chain, they have more energy because they repel each other. When you take away one phosphate group, energy is released because the negative charge between those two is released.
They store and use ATP (Adenosine Triphosphate).
:)