Página — Uerakua Anapu Uantakua Projects And Readings 3 (pág. 46)

5. Once you get the conductivity meter, test the solubility of the materials and include those that were mentioned in your interview.

10 tablespoons of salt 50ml of vinegar

50 ml of alcohol

3 tablespoons of talcum powder )10 tablespoons of sugar 》10 tablespoons of baking soda 2 powdered acetylsalicylic acid tablets

6. Place the glasses as follows:

a) Glass 1 will be the control, which means that it only contains water for the iron (distilled water).

b) Pour ironing water into glass 2 until it covers a quarter of the container. Add salt until saturation point is reached; that is, until the salt is no longer dissolved. Answerin your notebook how easy it was to dissolve the salt and then saturate the water with salt.

7Coloring powder

1 l of distilled water or ironing water 50 g of instant coffee

Other substances you use daily 》Plastic cups

A feeding bottle

Labels and indelible marker

C)Repeat the previous steps with the other solid substances: talcum powder,sugar, baking soda, instant coffee, and acetylsalicylic acid. Write down whether the substances were soluble or not.

d) Once the containers are ready, place the tips of the conductivity meter into each mixture and record whether the light turned on or not. Between each measurement, rinse the tips with distilled water.

e)Place each type of liquid separately in a different glass; immerse the tips of the cable and record if the light turned on or not.

107




45