rexyme

A teacher and a learner!

Chapter 18: Chemical Changes

by

Overview of what you need to know (the foundation) type of reaction condition combustion heat and presence of oxygen thermal decomposition heat oxidation presence of oxygen neutralisation between acid and alkalis Chemical Reaction that Produces Hydrogen Gas metal + acid –> salt + hydrogen e.g zinc + sulfuric acid –> zinc sulfate + hydrogen Observation? … Read more

[1NA/E] Chapter 4: Separation Techniques

by

Solute: the substance that makes up the minority of the solution (substance that dissolves in a solvent). E.g salt (solute) dissolves in water (solvent) Solvent: the substance that makes up the majority of the solution (the substance that dissolves the solute). E.g water (solvent) dissolves salt (solute). Note: water is a universal solvent. “Universal” is … Read more