Science Buddies: "Ask an Expert"

I NEED HELP!!!!!!!! I am doing a project of the Study of Chirality with a Homemade Polarimeter and I put together all of the solutions and performed the experiment wonderfully. The problem is that I have to measure the angles at which the solution gets darkest along with the screen, but I don't know how to graph the angle or rotation versus the concentration of the solutions.
Any assistance will be greatly appreciate it.
Marisela Rios
8th grade Student

Hi jamesmari0211,

I’m assuming that you’re working on the project described here:

https://www.sciencebuddies.org/science- ... p073.shtml

When you’ve finished testing the solutions, you’ll have a piece of cardboard marked with points where the computer screen and solutions were darkest during the rotation. These points are used to measure the angle of rotation for each solution.

After completing the angle measurements you should make a data table that shows the glucose concentration and the angle you measured for each solution. The data table will make the graphing easier. You might want to try an “X/Y scattergraph” where you plot the concentration data on the x-axis and the angle data on the y-axis.

The following link has a short tutorial on this kind of graph and some examples.

https://www.mathsisfun.com/data/scatter-xy-plots.html


I hope this helps. Please post again if you have more questions.

A. Norman