In class, we did a lab showing how much carbon dioxide was in the air and how it affects things. We put some Phenolphthalein (indicator for acid, to tell if it's basic or acidic) into a flask, and then added in pure ethanol to help dissolve the Phenolphthalein, then added in deionized water (water without any hydrogen). Once adding the water it then turns the chemicals a milky white, which means they don't have any acids in it . After the water, we added NaOH (a basic) into the chemicals, which turns the mixture deep red.
Once the NaOH is added we put some drops onto paper, but the mixture turned clear. It turns clear because Carbon Dioxide mixes with Water, making Carbonic Acid (H2CO3). This happens because the Carbonic Acid splits, releasing a hydrogen ion making HC2, and the other leaves a hydrogen making CO3. When the chemicals turn clear, this is showing how the hydrogen ions make the chemicals more acidic because of the carbon dioxide.
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December 2016
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