Read the summary and the most important questions on Decomposition and synthesis in the industry

• 1 Base materials

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• Why have we called crude oil 'black gold'?

  because it is a raw material or base material for many substaces that have contributed to increasing our prosperity.

• For what is crude oil more a base material than fuel?

  for the production of synthetic materials like plastics ad for the production of wshing powders, dyes , cosmetics and medicines.

• Where do all theseproduction  processes take place?

  in the (petro)chemical and pharamaceutical industry.

• What is a base material?

  it forms an important starting point in a production process in the undustry

• Why are more and more products getting reused?

  The raw materials, neessary for the chemical industry, are beginning to get scarce

• What is 'green chemistry'?

  sustainable base materials are used as much as possible.

• 2 How do you recogise a decomposition reaction?

• What is decomosition reaction?

  a chemical reaction in which two or more products are formed from one reactant

• Are most decompostion reaction endo- or exothermic?

  Most decompositon reactions can only take place when energy is suppled and therefore they are endothermic. Rarely a deompositio reationn is exothermic.

• What does the exothermic reaction of ammonium dichromate look like?

  It is heated. This is needed to help start the reaction. When, after a short time, the burner is removed, the substance will continue to glow. Heat is produced then until the reaction had ended. It is exothermic.

• What is the difference between decomposition reactions and combustion reactions?

  In a combustion reaction oxygen is always needed and oxygen will always be found in the equation on the left-hand side of the rection arrow. In a decomposition reaction oxygen is never found on the left-hand side of the reaction arrow.