A common pattern that substances follow on a solubility curve tends to become more soluble as temperature increases, although some don't change much (NaCl). A solute that I tested for at 3 different increasing temperatures and measured the solubility at each was succinic acid, historically known as spirit of amber.
Procedure: First, Abby, Jilly, and I started with two beakers, three graduated cylinders and we shared a tong with the group next to us. Also, we shared the hot plate and regularly reminded each other to be careful. Setting the hot plate to the highest temperature to heat the water up quickly was definitely a smart idea. Next, we poured 300 ml of tap water into our beaker. Then, my group placed the beaker filled with 300 ml of water onto the hot plate. Waiting until the temperature reached 48.5 C my team used teamwork; I stirred the water, while Jilly held the thermometer and Abby constantly documented our every move.
When the temperature reached 48.5 C, we used the tongs to place the hot beaker onto a napkin on the table.
While Abby parted from Jilly and I, to get the succinic acid, 
we continuasly heated the water to speed up the process. We then distributed 4 grams of the succinic acid into a test tube. 
Although the instructions said to poor 20 mL of distilled water into the test tube we fit as much as we could. 
Then we placed the test tube filled with the succinic acid and distilled water into the beaker of hot water that was placed on the hot plate to maintain its temperature. Not only did we place the test tube in the warm water, but stured it for seven seconds ever thirty seconds. While Jilly maintaid the temperature, Abby was not only keeping track of the time and telling me when I should stir, but also documenting and taking pictures. While I was string, I accidentally broke the glass and for the rest of the first temperature we shared with the group next to us. After placing the test tube in the hot water, we carufully removed the water from it and placed it into a new test tube and left the undisolved substance. We then diluted the succinic acid and disgaured it into the sink.
We then took the test tube out of the iced water bath
and watched it slowly become a snowy texture and look.
My group then repeed this process two more times, and at different water tempertures. We realized how much more saluable succinic acid is when its temperature is higher. It was really interesting to see the derastic different results.
Results: As the temperature increased, the acid became more sulubale.
No comments:
Post a Comment