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.
When HCl reacts with water, the hydrogen ions react with the hydroxide ions to form water: Hâº + OHâ» â HâO. Thus, the reaction between HCl and Mg(OH)â is then: 2HCl(aq) + Mg(OH)â(s) â MgClâ(aq) + 2HâO(l) The products are magnesium chloride and water. Using ions, the reaction is: 2Hâº(aq) + 2Clâ»(aq) + Mg(OH)â(s) â 2HâO(l) + MgÂ²âº(aq) + 2Clâ»(aq) We can cancel Clâ» from each side of the equation.