For litmus, it so happens that the 50 / 50 colour does occur at close to pH 7 - that's why litmus is commonly used to test for acids and alkalis. As you will see below, that isn't true for other indicators. Methyl orange. Methyl orange is one of the indicators commonly used in titrations. In an alkaline solution, methyl orange is yellow and the structure is: Now, you might think that when you add an acid, the hydrogen ion would be picked up by the negatively charged oxygen. That's the obvious place for it to go.
Ankle sprain: Types list. The list of types of Ankle sprain mentioned in various sources includes: 1  Anterior talofibular ligament sprain - most common. 2  Calcaneofibular ligament sprain - second most common.  Inversion injury - from the foot turning inward.
A sprained ankle can occur when your foot turns inward, placing extreme tension on the ligaments of your outer ankle. A sprained knee can be the result of a sudden twist, and a wrist sprain can occur when falling on an outstretched hand. A twisting force to the lower leg or foot is a common cause of ankle sprains. Grade 1 sprain (mild): Slight stretching and some damage to the fibers (fibrils) of the ligament. 2  Grade 2 sprain (moderate): Partial tearing of the ligament. 3  There is abnormal looseness (laxity) in the joint when it is moved in certain ways. 4  Grade 3 sprain (severe): Complete tear of the ligament.