A 0.500 g sample of an unknown substance was titrated with a 0.1 M HCl solution. Another 0.500 g sample of it was titrated with a 0.1 M NaOH solution. The resulting titration curves are illustrated here. Given the following possibilities, what is the sample? 
Definitions:
High Cost
A term describing situations or items that require a significant amount of resources or money to obtain or maintain.
Marginal Products
The additional output resulting from the use of one more unit of a variable input while holding other inputs constant.
Separating Equilibrium
A condition in game theory or economics where different types of participants are sorted into different equilibria based on their characteristics or type.
Pooling Equilibrium
A situation in game theory where different types with different characteristics choose the same strategy, making it impossible to distinguish between them based on their actions.
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