Using incorrect concentrations. If your vitamin C standard solution is too concentrated or your iodine titration solution is too diluted, or your starch indicator solution is not between 0.5 to 1.0%, it may require much more than 50 mL of iodine solution to titrate the standard solution and/or orange juice.
The following summarizes some common causes of fatigue but is not meant to be comprehensive: Metabolic/endocrine: anemia; hypothyroidism; diabetes; electrolyte abnormalities; kidney disease; liver disease; Cushing's disease.
Common causes of fatigue include: 1  Inadequate sleep. 2  Anxiety and depression. 3  Increased energy exertion secondary to movement problems.  Reduced stamina and 1  deconditioning. Secondary to medicines for movement, pain, mood.  A primary symptom of the disease itself.