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.
The exact cause of fatigue is often hard to pinpoint. It can be caused by sleep irregularities, asthma, gastrointestinal disorders, lack of or too much exercise, and certain medications. Fatigue can also be caused by psychological issues such as stress, depression, and anxiety. Diarrhea is also a very common condition that most people have experienced. While this is true, diarrhea can be a sign of a few very serious conditions. Diarrhea, like fatigue, can be caused by certain medications. It can also be caused by viruses, bacteria, lactose, fructose, and digestive disorders. Diarrhea can lead to fatigue because it causes the body to become dehydrated. If you have serious enough diarrhea and lose enough water, you can become intensely fatigued.