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:
Bland Diet
A diet consisting of foods that are mild in flavor and easy on the stomach, typically recommended for people with gastrointestinal issues.
High-Calorie, High-Protein Diet
A nutritional plan that significantly incorporates foods rich in calories and proteins, often recommended for individuals needing to gain weight or muscle mass.
Body Mass Index
a numerical calculation that evaluates an individual's body weight in relation to their height, used as an indicator of obesity and underweight.
Nutritional Levels
Refers to the concentration of nutrients in a given food or diet, important for maintaining overall health.
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