Página — Uerakua Anapu Uantakua Projects And Readings 3° Secundaria (pág. 159)

Procedure

1. Draw a table in your notebook with the substances you will use and indicators.

2. Measure 100 ml of drinking water with the baby bottle and pour it into the hibiscus flowers in the beaker. Boil them until the volume reduces by half.

3.Wait until it cools down, filter the liquid with a strainer,and put it in a flask, bottle, or dropper.

4.Cut a few leaves of purple cabbage carefully into small pieces.

5.Boil them in 100 ml of drinking water until the volume is reduced by half.

6.Let it cool down, filter, and keep the infusion in a flask or bottle. The more purple cabbage leaves you use, the more concentrated the indicator liquid will be.

7. Put the following labels on the cups:"Baking Soda,""Salt,""Acetylsalicylic Acid,""Soap Powder,""Antacid,""Alcohol,""Vinegar,""Milk,""Lemon Juice,"and "Liquid Soap."

8.With a syringe, put 10 ml of each liquid in the corresponding cup (you must do it twice) and squeeze the juice of two lemons into each cup. Put the solids, ike baking soda, salt, and soap powder, in a cup, dissolve them with about 10 ml of water, and stir.

9.Cut the acetylsalicylic acid tablets into small pieces and put half of them in each cup. Then, add 10 ml of water and stir.

10. Once you have put all the products in the cups, write their characteristics in the table, take pictures, or draw the samples.

11. Add five drops of the hibiscus indicator liquid to a batch of cups with the products. Take pictures or draw the changes you noticed and write them in the table.

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substance	Characteristics	Hibiscus Indicator	Purple Cabbage Indicator
Antacid
White vinegar





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