Welcome to the wonderful world of chemistry. Today with the help of the Chemistry of Plants said by Mail Chemistry, we will see how acidity affects the color of anthocyanins. Perform this experiment on a plastic tray to contain any possible spills. Don't forget to put on protective gloves and goggles before doing the experiment. To open a bottle containing a regent, push the cap down and turn it. Pierce the bottle nozzle with an unbent paperclip. For the anthocyanins experiment, you will need solutions of sodium hydrogen sulfate and sodium carbonate, filter paper, a wooden stick and a pipette. You will also need the flask, the funnel, and two disposable cups from your starter kit. Also, prepare some hot water and a red rose. Tear up some petals and put them in the disposable cup. Add enough hot water to completely immerse the petals. And stir the mixture with a wooden stick. Wait for 10-15 minutes. During this time, the anthocyanins in the petals will be dissolving in the water and coloring the solution. Take the filter paper and fold it as shown in the video. Now take the flask and put the funnel into it. Then put the folded filter paper into the funnel. Gradually pour the solution out of the disposable cup into the funnel to filter out the petal fragments. Take one more disposable cup and pour some filtered solution into it using a pipette. Then add three drops of sodium hydrogen sulfate solution. The solution will change colors from pink to red. Now add the solution of sodium carbonate drop wise. The color of the solution will change dramatically. This color change takes place because the anthocyanins are sensitive to the acidity or pH level of the solution. Sodium hydrogen sulfate makes the solution acidic. And in acidic conditions, anthocyanins turn red. Sodium carbonate solution has a basic medium, so it gradually makes the solution more basic. All of these make the anthocyanins solution change colors from red to blue and green, indicating the changes in pH. Learn more about this experiment on our male science website.