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.
There are many different causes for fatigue. Some are due to your cancer or the treatment you are getting. Others are due to your mental or emotional response to your disease or treatment. Fatigue may also be due to any other illness you may have such as diabetes or high blood pressure.