Disappearing ink was our most recent experiment. We used phenolphthalein, ethanol, distilled water, and sodium hydroxide. We started by mixing a little phenolphthalein and 10 ml of ethanol in a flask. Next we added the distilled water. When we did this we saw a chemical reaction happen, it changed colors. Andrew came around and added a few drops of sodium hydroxide. This made the mixture change to a dark red. When we would take a little out and put it on paper you would slowly see it disappear as it dried. This works because when the hydrogen ions that were created are exposed it turns the ink to invisible.
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Humans produce tons of CO2, about half of this pollution is dissolved into the ocean. The other parts going into living things. The pH scale ranges from 0-14. 0 is being very acidic and 14 very basic. 7 is the neutral and what distilled water is. The p in pH stand for the potential to create charged hydrogen atoms. Because the pH scale is logarithmic the smallest change means a lot. Recently there has been an increase in acidity in the ocean. The problem with CO2 being released is that it creates a chain reaction which allows more Hydrogen to release in the water therefore increasing the acidity.When this happened ocean animals have a tougher time living and eating because they require a complicated chemical reaction that the increase in acidity affects.
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December 2016
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