Krishan+G13

=**INVESTIGATING THE LENGTH OF TIME IT TAKES DISAPPEARING INK TO DISAPPEAR IN DIFFERENT LIQUIDS **=
 * Krishan G.**
 * 2012-2013**
 * Cary Academy**

=**Abstract **= The purpose of the experiment was to determine the length of time it took for disappearing ink to disappear depending on what acids, bases, and neutrals in it. It was hypothesized that the disappearing ink with an acid in it, either lemon juice or vinegar, would take the longest time to disappear. This was hypothesized because disappearing ink is a base with a large pH, and lemon juice and vinegar are both acids with a small pH, and it was thought that the low pH of the acids would counteract with the high pH of the disappearing ink, causing the ink to lose its functionality, resulting in it taking more time to disappear. The experiment was conducted by filling six beakers with disappearing ink, and adding lemon juice to one, vinegar to another, ammonia to another, liquid antacid to the next, spring water to another, and rubbing alcohol to the last. Next, a portion of the liquid in each beaker was sucked into a dropper, squeezed onto a paper towel, and the time it took for the color to disappear was measured. The disappearing ink with the acids in them actually took the shortest time to disappear, when the disappearing ink and an acid made first contact the blue color instantly disappeared. The disappearing ink with ammonia, spring water, and rubbing alcohol took the longest to disappear; the disappearing ink with the liquid antacid took none.

The experiment could be improved by putting more of an acid, base, or neutral in the disappearing ink, so we can really see how greatly they affect it. Future experiments that could be performed are using different kinds of acids, neutrals, and bases, and figuring out the pH when they are added to disappearing ink and how long the finished substances take to disappear. These different acids and bases could also be combined and put into disappearing ink, and the pH can be measured, as well as how long the finished substances take to disappear. Another experiment that could be done is experimenting with acids, bases, and disappearing ink using different amounts of each liquid, and testing them on different surfaces, such as the counter top, copier paper, or lined paper.
 *  Experimental Improvements & Future Experiments **

