Two Discussion Posts

For this discussion board we will share videos of experiments/demonstrations in which chemical reactions are performed and we will explain the reaction happening.

1- Look online for a video of a simple chemical experiment/demonstration that shows how the reaction is performed.

Here are some links you could use for your search.

https://www.iflscience.com/chemistry/unfinished-20-fun-science-experiments-you-can-do-home/

https://www.iflscience.com/chemistry/unfinished-20-fun-science-experiments-you-can-do-home/

https://www.youtube.com/results?search_query=chemical+experiments+at+home

https://www.neatorama.com/2009/11/04/top-10-mad-science-worthy-chemistry-experiments/

2- Watch the video and identify the main chemical reaction in the demonstration: Reactants, catalysts, material, procedure and products.

EXAMPLE:

a. https://cdnapisec.kaltura.com/index.php/extwidget/preview/partner_id/1700302/uiconf_id/32654372/entry_id/0_t47kkq75/embed/dynamic

b. The overall equation for this reaction is:

2 H2O2(aq) → 2 H2O(l) + O2(g)

The decomposition of the hydrogen peroxide into water and oxygen is catalyzed by the iodide ion.

Materials:

30% hydrogen peroxide (H2O2)

Saturated potassium iodide (KI)

Liquid dishwashing detergent

Food coloring

Graduated cylinder/Tall Container

c. Summary

When hydrogen peroxide (H2O2) decomposes, it breaks down to form water (H2O) and oxygen (O2). Sodium iodide acts as a catalyst speeding up the decomposition of hydrogen peroxide. The soap bubbles that erupt from the container are filled with oxygen. As the reaction takes place, steam rises from the erupting foam. This shows that the reaction is exothermic, meaning that it gives off heat.