Cabbage juice turns pink when you add an acid, such as vinegar. … It turns blue, or even green, when you add a base, such as baking soda. A chemical reaction occurs when an acid and a base are mixed together.
What happens when baking soda is added to red cabbage juice?
Adding baking soda to the cabbage juice makes it a neutral base. When you add liquids to the cabbage juice, very acidic solutions will turn it a red color; neutral liquids make a purplish color; and basic solutions will make cabbage juice a greenish-yellow.
What color does cabbage juice turn in baking soda?
The vinegar will turn the cabbage juice red because it is an acid (acetic acid). The baking soda will turn the cabbage juice greenish-yellow because it is a base (sodium bicarbonate).
What happens to a baking soda solution if we drop a Red Cabbage Indicator?
Acidic solutions (acids) like vinegar, lemon and other citrus juices (which contain citric acid) and sodas (carbonic acid, or carbon dioxide dissolved in water) make the anthocyanin in cabbage juice turn reddish colors, while basic solutions (bases) like ammonia, baking soda and soaps turn cabbage juice bluish or …
What color does red cabbage turn in white vinegar?
As long as they are acidic they stay red, but when they become non-acidic they turn blue. When you sauté red cabbage, the acids evaporate off and it can turn blue. All you have to do is add lemon juice or vinegar to bring back the bright red color.
What is the pH of baking soda?
Baking soda, also known as sodium bicarbonate, is a base. This means that when people dissolve baking soda in water, it forms an alkaline solution. For example, a 0.1 molar solution of baking soda has a pH of around 8.3.
What is the pH of red cabbage juice?
Filter out the plant material to obtain a red-purple-bluish colored liquid. This liquid is at about pH 7.
Why does vinegar turn red cabbage pink?
Add a little vinegar to the first glass of cabbage juice. Stir with a spoon and notice the color change to red, which indicates that vinegar is classified as an acid. All acids will turn red when mixed with cabbage juice.
Why does red cabbage juice change color with different pH?
Red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base. The pigment turns red in acidic environments with a pH less than 7 and the pigment turns bluish-green in alkaline (basic), environments with a pH greater than 7.
What color does ammonia turn when you add red cabbage juice?
Pour about 50 – 100 mLs of your red cabbage indicator into each 250 mL beaker. Add your indicator to various household solutions until you see a color change. For example: Ammonia will turn your indicator green, NaOH -yellow, vinegar -red, and HCl – a deep red.