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All about chemistry: High School investigations

“I am measuring the effect of changing the temperature of the acidity of seawater,” Isabella says. “So I've made my own seawater simulation. I'm measuring the pH while holding the thermometer. Carbon dioxide comes into the solution and it’s supposed to make it less acidic.”

“They researched, came up with the investigation itself, and are collecting, analyzing, and evaluating the data,” High School Chemistry Teacher Garry explains. “Part of the course work is they have to do an individual investigation. Part of the investigation is for them to look up and see if they can find something that they are interested in doing.”

“I'm seeing how the concentration of the copper sulphate solution affects the copper plating and how much mass is transferred from one copper strip to the other,” Brady explains. “I'm hoping to learn how the concentration of that affects how much mass is transferred from one of the copper strips to the other through the electrolysis. Then I use the scale to measure before and after each thing and a hairdryer to dry it off.”

“I've added different amounts of salt to a solution I've made and then tested the viscosity, so how thick it is,” Christian explains. “I'm dropping a metal ball to see how fast it goes through the solution and that'll tell me how viscous it is. I’ll see how the salt affects how thick it is.”

“I'm working with a dye called crystal violet and I have different concentrations of it and I'm analyzing it with a spectrophotometer to see the absorbance of a certain wavelength,” Oliver says. “With that I'm making a calibration curve so then later I'm going to do an experiment where I'll have an unknown concentration of it and I'll basically analyze the color and I'll see what concentration of dye the line predicts. I'm happy I'm doing this project because it's really interesting going through these different processes.”

“Right now I'm going to be measuring the effect of salt on the viscosity of soap,” Joseph discusses. “So I put different amounts of salt in the same amount of soap with the same concentration. Then I'm going to measure the speed in which it falls through a buret. That'll tell me how viscous it is, because if it is more viscous it'll fall slower.”

“I am measuring the rate of reaction of the decomposition of hydrogen peroxide,” Shruti discusses. “So when I add the catalyst in, it fizzes. I'm going to do it at different temperatures to see how fast the reaction occurs, which I’ll measure by seeing how much oxygen is produced.”