We split up into groups and did experiments. The
topic that was covered in my group was about the solubility of sugar with
liquids ( H2O, coca-cola, milk, and vinegar). The independent variable is type
of liquid, and the dependent variable is time. We would heat up the liquid to
100 degrees celsius then put 3 tsp of sugar in, then see how long it would take
for them to dissolve, we did this three different times. What I knew before we
started was that it takes sugar water only a few minutes to dissolve in water
so I thought that water would be the one to dissolve the fastest. After we got
done I found out that vinegar made sugar dissolve the fastest at 15.85 seconds
H2O took 20.55 seconds it was 3rd fastest.
Some
interesting things that happened in our experience was, when we put sugar in
the coca-cola it would make a lot of carbonation (almost overflowing the
glass). The most dramatic change was the soda it went from 31.84 - 16.18
seconds. The one that stayed the most constant was vinegar it went from 18.18 -
12.68 seconds. It was really interesting to me how the milk didn’t seem any
different, but even for a little the soda, vinegar, and water changed a
little.
My
question for this is did the sugar dissolve faster in the last try because
maybe the liquid was warmer? The topic is important because it shows you that something can be changed no
matter what. Even if you are adding something that dissolves, interest still
changed it and you can not change it back to what the interest way before you
added stuff in the liquid.
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