Red cabbage juice & Baking soda mixed together. My son also likes to pour in a larger amount all at once to make a big reaction. Once we did this we used pipettes to squirt in vinegar. You may add more of both if you would like to have a bigger reaction.
Then slowly add spoonfuls of baking soda in and stir until it all turns blue.
I found it works best when there is just a thin layer covering the bottom. Pour in several spoonfuls of red cabbage juice or spread out several spoonfuls of finely blended red cabbage leaves into a bowl or tray. Baking soda mixed with turmeric then turmeric is added to it. My son used a pipette to squirt vinegar onto it to see what happened. We then spread the mixture out onto a tray. Add in one or two spoonfuls of water and then mix it together. Mix in several spoonfuls of turmeric into half a cupful of baking soda.
There are some substances, known as indicators, which can help identify the pH of a substance. Each time this happens, water (H2O) and a salt is formed. They neutralize one another by breaking apart and reforming into new substances. When an acid and base come in contact with one another, a chemical reaction occurs. The greater the concentration of these ions, the more acidic or basic the substance. Acids have hydrogen ions (H+) and bases have hydroxide ions (OH-). Acids and bases are created by the presence of charged ions (H+ or OH-) that help make up the chemical. The pH measures the presence or absence of hydrogen ions. The pH measures how acidic or basic (alkaline) a substance is and ranges from 0 to 14, with 7 being neutral. It may also help them begin to think about whether there might be ways to ‘prove’ that new and different substances are formed as part of the reaction. It can help children begin to explore the changes in pH that occur as part of the reaction. The experiment in this post explores pH, in addition to chemical reactions. This will help children to gain awareness of the role that heat plays in chemical reactions. Another approach is to do frozen vinegar or frozen baking soda experiments. It will also help them to understand that new and different chemicals are formed as part of the reaction. These experiments will help them to become more aware of the CO2 that is produced. Some preliminary baking soda and vinegar science experimentsĬhildren can combine vinegar and baking soda with soap or in bags. These experiments build on one another and help solidify understanding. By allowing children to explore this simple and safe reaction in a variety of ways, it helps them to ask questions, further investigate and make connections. Each new experiment adds a layer of excitement and learning.
Since we first did this reaction, we have done a number of different vinegar and baking soda experiments. My son loves the bubbles that are made when baking soda and vinegar react. It may then lead them (older children especially), to further investigations. This experiment will help them to begin to explore both of these topics. It can take some time for children to understand both the concept of chemical reactions and that of pH. This color changing baking soda and vinegar science experiment is a fun way for children to observe changes in pH as the reaction occurs. Color Changing baking soda and vinegar science experiment
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