A good contract bookkeeper is able to: 1  Set up accounting systems and software properly. 2  Enter transactions. 3  Perform checks, reconciliations and end of year processes.  Ensure they are up to speed with legislative requirements and management 1  reports. Undertake payroll duties and compliance.
An active metal is a metal that displaces hydrogen from an acid. Examples of active metals include magnesium, zinc and iron. This type of reaction is also called a single displacement reaction where the active metal 'displaces' the hydrogen from the acid. Examples of reactions involving acids and active metals. 1  Hydrochloric acid + Magnesium â Magnesium chloride + Hydrogen.
The Hydrochloric Acid was added to the ribbon of Magnesium, the magnesium dissolved and formed hydrogen gas. When Sucrose was heated it burnt and resulted in a chemical change. Magnesium. When Sodium Hydrogen Carbonate was mixed with HCI it was cold, bubbly, and it resulted in a chemical change.hen you mix magnesium with hydrochloric acid, the hydrochloric acid dissolves the magnesium and produces Hydrogen gas. The less concentrated the hydrochloric acid is, the slower the magnesium dissolves. Hypothesis. If the hydrochloric acid is mixed with the magnesium, then it will result in a chemical change.