# data[].attributes.body
We put orange juice, lemon, vinegar, tomatoe juice, ammonia and oxygenate water into the test tubes with a dropper. We put just some drops of the solution into the tubes and we observe that the colour will change and become red(acid substance) or green-blue(basic substance).

# data[].attributes.body
We filter the solution with filter paper and we put the obtained solution into a becher.

# data[].attributes.body
We cut the red cabbage leaves and put them into a bowl with water.
Boil the water for about 20 minutes and we obtain a blue solution.