How to make home made PH scale

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To create a homemade pH scale, you will need a few common household ingredients. Here is a step-by-step guide on how to make one:

Materials needed:
1. Red cabbage
2. Distilled water
3. Blender
4. Several clear glass containers or bowls
5. Lemon juice (acidic solution)
6. Baking soda (basic solution)
7. Vinegar (slightly acidic solution)
8. Soap solution (slightly basic solution)
9. Various other household substances you want to test

Instructions:

1. Prepare the red cabbage indicator:
a. Chop the red cabbage into small pieces.
b. Put the cabbage pieces into a blender.
c. Add distilled water to the blender until the cabbage is fully covered.
d. Blend the mixture for a few minutes until you have a purple juice.
e. Strain the liquid from the cabbage pulp, and set it aside. This liquid is your red cabbage indicator.

2. Label the containers or bowls:
a. Take the clear glass containers or bowls, and label them with the pH values you want to test (e.g., 1, 2, 3, 4, 5, 6, 7, etc.).

3. Prepare the solutions:
a. Pick a substance you want to test, such as lemon juice, vinegar, baking soda, or soap solution.
b. Pour a small amount of the substance into one of the labeled containers or bowls.
c. Repeat this step for each substance you want to test, using a new container for each.

4. Test the substances:
a. Pour a small amount of the red cabbage indicator into one of the containers or bowls.
b. Observe any color changes that occur.
c. Compare the colors to the labeled pH values on your homemade pH scale.
d. Repeat this process for each substance, using a new container for each.

5. Assign pH values:
a. Based on the color changes observed, assign a pH value to each substance according to your homemade pH scale.
b. For example, if the indicator turns pink or red, it indicates an acidic substance with a low pH value (below 7). If it turns green or blue, it indicates a basic substance with a high pH value (above 7).

Note: This homemade pH scale is not as accurate as professional pH testing kits or pH meters, but it can provide a general idea of the pH values of different substances using a visual color reference.