2. Chemistry lab
As indicated in the preliminary report, we have received evidence from the office of Doctor John Carles.
Because of his multiple allergies, we know he was very careful about everything he ate, he always drank filtered water from a dispenser, and just in case, he had bottles of mineral water on hand. However, the collected liquid samples are highly contaminated. In a glass that was on your table, for example, there are several mixed substances. Some are seen with the naked eye, but is there something more dissolved in the water? Can there be any element that has caused the heart attack? Have they been introduced deliberately? To answer these questions we must study it thoroughly and separate, one by one, all the substances that compose it.
Because of his multiple allergies, we know he was very careful about everything he ate, he always drank filtered water from a dispenser, and just in case, he had bottles of mineral water on hand. However, the collected liquid samples are highly contaminated. In a glass that was on your table, for example, there are several mixed substances. Some are seen with the naked eye, but is there something more dissolved in the water? Can there be any element that has caused the heart attack? Have they been introduced deliberately? To answer these questions we must study it thoroughly and separate, one by one, all the substances that compose it.
ACTIVITY 3: THE MATTER
First of all, individually, we inform ourselves about the chemical mixtures and their properties following the indications of these interactive didactic units:
We organize in groups:
1) We write the following concepts in post-it. We share the work, each member of the group writes 3 (each in a post-it)
MATERIALS / MASS / VOLUME / PURE / COMPOUND SUBSTANCE / ELEMENT / ATOM / CHEMICAL METHODS / PHYSICAL METHODS / MIXTURES / DISSOLUTIONS / HETEROGENEOUS MIXTURE
2) Each one reviews the definition of the 3 terms of their post-it and writes it in the digital portfolio (notebook) of the group
3) Throughout the group, we make a map of concepts on A3 size paper, placing all the post-it, putting examples and joining them with connecting sentences.
1) We write the following concepts in post-it. We share the work, each member of the group writes 3 (each in a post-it)
MATERIALS / MASS / VOLUME / PURE / COMPOUND SUBSTANCE / ELEMENT / ATOM / CHEMICAL METHODS / PHYSICAL METHODS / MIXTURES / DISSOLUTIONS / HETEROGENEOUS MIXTURE
2) Each one reviews the definition of the 3 terms of their post-it and writes it in the digital portfolio (notebook) of the group
3) Throughout the group, we make a map of concepts on A3 size paper, placing all the post-it, putting examples and joining them with connecting sentences.
ACTIVITY 4: SEPARATION OF MIXTURES In the following presentation we will learn the physical methods of separation of mixtures 1) We read it individually. |
2) Then we fill in the following table. To this end, one member of each previous group will be responsible for looking for information about one separation method, summarizes it in the box and searches for an image / video on the Web with an example (do not forget to reference it). We put it in our portfolio.
3) Each member will explain to the others the method of separation studied to complete the picture among all. The rest will evaluate the information received with the rubric.
We add 10 the points obtained from this assessment. Carry on!
Now we have the basics to analyze the mixture and separate its components. We return to the scene of the crime and we continue in the point 3
COMPLEMENTARY ACTIVITIES (EXTRA POINTS)
- Make a poster with photographs of pure substances and usual mixtures
- Make a small display of jars with homemade mixtures