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8th Grade Chemistry Essay

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You have nine chemicals in front of you, one is a mystery mixture. You must find out what it is! That is exactly what the 8th-grade science class had to do. To determine what was in this mysterious container we used physical and chemical properties. Physical properties are when you observe something. Such as, looking at the shape, size, smell, texture, color, and appearance. Chemical properties are when two or more substances combine to form a new substance. Such as they either change in temperature, color, odor, or when they either precipitate or fizz and bubble. Most of the eighth-grade classes claimed, in the end, that it was citric acid (C6H8O7) and baking soda (NaHCO3). When the eighth-grade classes began the experiment, they found that when they mix citric acid, baking soda, and a few drops of water it created a reaction. When mixed with water, citric acid and baking soda started to fizz and bubble. This fizz and bubbling went as…show more content…
Here is one of them, baking soda, citric acid, and Ascorbic acid. Some of the people disagree with this claim and here is why. When setting overnight the mixture turns color, it has a tint of yellow while the mystery mixture stays clear. When the class did a large-scale experiment on the mystery mixture and baking soda, citric acid, and ascorbic acid, they found that it did not fizz and bubble as long as the mystery mixture, when added to water. It was actually 113 seconds while the mystery mixture was 125 seconds. They also found out that the temperature was 16.6℃ and the mystery mixture was 16.7℃. So their claims temperature was point one off. The physical features in this mixture were also off. The citric acid and ascorbic acid made it so that there was a lot more crystaly objects in the mixture than in found in the mystery mixture. The ascorbic acid crystals were way too small to be the mystery
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