Phenolphthalein Lab Report Sample

Phenolphthalein Lab Report Paper The breasted-Lowry theory defines an acid as a hydrogen-ion donor, which basically means the element would donate an ion. Unlike a bas is a hydrogen-ion acceptor which takes on an ion. I learned ammonium is very soluble in water and accepts a hydrogen ion, so it would be a breasted-Lowry base whereas water is a hydrogen-ion donor, or a breasted-Lowry acid. Hydrogen ions would transfer to the ammonium in a reaction to form a conjugate acid. A conjugate acid is formed when a base gains a hydrogen ion. Hypothesis: Oxygen from our breath changes the solution. Objectives 1) Determine how an acid is neutralized 2) Determine why a color change occurred 3) Learn the difference between an acid and base. 4) Does the timing and color change have a pattern? 5) Does blowing into the indicator solution change its pH? Materials 1) Safety Goggles Phenolphthalein 4) Pipette 6) Straw 7) Apron 9) Water mils Observations: 2) Timer 3) 5) Ruler Meyer flask 8) Ammonia NH drops The student began with mils of water, 3 drops of NH (ammonium), and drops of Phenolphthalein. The student then proceeded and blew into the straw. The second student recorded the times; the timer was stopped once a change was visible. The solution started off as a vivid pink, but after blowing through the straw the solution changed into a clear color. It took 34 seconds for the solution to turn clear. After one of the students did a quick speed walk through the hall the time was recorded. The second trial had quit different results; it took only 25 seconds for it (the solution) to turn clear. Immediately following that the third trial was done and the time was very close to the first one. We will write a custom essay sample on Phenolphthalein Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Phenolphthalein Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Phenolphthalein Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The time being 34 seconds revealed a very important pattern. Conclusion: When the phenolphthalein was added to the solution, it turned the solution pink, indicating that a base was present. In the solution the present base(s) were water, phenolphthalein and ammonium which affected the solution unlike the phenolphthalein, which just indicated a change. After blowing air into the solution it turned clear establishing/revealing fact that an acid was present. Since the color changed then the pH must have changed. A base has a low pH while an acid has a high PH. At a very high pH level the solution decolonize again into an acid. The phenolphthalein or indicator changes as the pH levels change. How is it that the solution changed colors without adding anything to it? Well the student(s) actually did add a key component to the solution. All humans inhale oxygen and exhale carbon dioxide. Once the student created the excess carbon dioxide it mixed with the water to create carbonic acid. Carbonic acid (WHICH) is a dipodic acid which contains two imaginable hydrogen. Carbonic acid is a fairly strong acid that completely unionizes in an aqueous solution. The pH/color change also revealed a pattern that corresponded to the times recorded. The color changed considerably more in the second trial for all of the students because the student produced additional carbon dioxide. When enough carbonic acid was produced it neutralized the ammonium and water; which is a base and makes the solution an acid.