The following drugs, medications, substances or toxins are some of the possible causes of Eyelid pain as a symptom. Always advise your doctor of any medications or treatments you are using, including prescription, over-the-counter, supplements, herbal or alternative treatments. 1  Lumigan.
Some substances dissolve when you mix them with water. When a substance dissolves, it looks like it disappears. But in fact it has just mixed with the water to make a transparent (see-through) liquid called a solution. When you mix sugar with water, the sugar dissolves to make a transparent solution. Salt dissolves in water too. Heat can help some substances dissolve faster in water. Salt, for example, will dissolve quicker in hot water than in cold water. Substances that dissolve in water are called soluble substances.
Highly soluble compounds, such as NaCl, break apart completely, while compounds with low solubilities, such as lead sulfate (PbSO 4) do so only partially. Compounds with nonpolar molecules do not dissolve. How Ionic Compounds Dissolve. In solution, each water molecule acts like a tiny magnet that creates a force of attraction on the ions in the solute.