This I/GCSE Chemistry post will look at different experiments regarding decomposition of substances as well as the combustion processes, let's go!
Thermal Decomposition
1)If you heat a metal carbonate you get carbon dioxide and a metal oxide.
2)This is an example of thermal decomposition, which is when a substance breaks down into simpler substances when heated
3)Copper(II) carbonate is a green powder that will easily decompose to form carbon dioxide and copper(II) oxide when you heat it.
4)Heres the equation for the thermal decompostion of copper(II) carbonate: CuCO3(s)= CuO(s)+Co2(g)
5)To do the experiment, heat copper(II) carbonate then collect the one that's given off in a test tube.
6)The gas that is collected can then be tested to see if it is CO2.
Combustion of elements
When you burn something it reacts with oxygen to make an oxide
Magnesium burns with a bright white flame and a white powder (magnesium oxide)
Equation: 2H(s)+O2(g)= @MgO(s)
Hydrogen burns with a orange/yellow flame and the only product is water. It burns with a squeaky pop.
Equation: 2H2(g)+O2(g)=2H20(g)
Sulphur burns with a pale blue flame and produces sulphur dioxide.
Equation: S(s)+O2(g)=SO2(g)
That is all !
References:
https://www.google.com/url?sa=i&url=https%3A%2F%2Figcse-chemistry-2017.blogspot.com%2F2017%2F07%2F212-describe-formation-of-carbon.html&psig=AOvVaw0Z5coHcZi0V-qe-9s0JCGA&ust=1628519648933000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCIiZhc7SofICFQAAAAAdAAAAABAD