Four African Teenage Girls Create a Pee-Powered Generator. Writing ionic equations for redox reactions. Working out electron-half-equations and using them to build ionic equations In the example above, we've got at the electron-half-equations by starting from the ionic equation and extracting the individual half-reactions from it. That's doing everything entirely the wrong way round!
In reality, you almost always start from the electron-half-equations and use them to build the ionic equation. Example 1: The reaction between chlorine and iron(II) ions Chlorine gas oxidises iron(II) ions to iron(III) ions. You would have to know this, or be told it by an examiner. You start by writing down what you know for each of the half-reactions. The first thing to do is to balance the atoms that you have got as far as you possibly can: ALWAYS check that you have the existing atoms balanced before you do anything else.
Now you have to add things to the half-equation in order to make it balance completely. All you are allowed to add are: That's easily put right by adding two electrons to the left-hand side. The Haber process. The Haber process Added by Lawrie Ryan on Mar 19, 2008 An interactive animation showing the industrial process used to manufacture ammonia. Explanatory text and the chemical equation for each stage is shown. Click the highlighted area to reveal the next step in the process. Click the text button to show the chemical equation. This resource is from the unit The Manufacture of Ammonia which is part of Absorb Chemistry. The full Absorb Physics course normally sells for £400 - but you can get it free for your school!
All you need to do is ask your colleagues in the maths department to try our new Sumdog games... Dynamic equilibrium model. Dynamic equilibrium model Added by Lawrie Ryan on Feb 27, 2008 An animation modelling dynamic equilibrium. A stylised microscopic view of two gaseous reactants colliding and a more dense product. The two reactants collide to form the product, which, in turn, breaks down again to give the smaller reactant molecules. This resource is from the unit Dynamic Equilibrium which is part of Absorb Chemistry. The full Absorb Physics course normally sells for £400 - but you can get it free for your school! All you need to do is ask your colleagues in the maths department to try our new Sumdog games... GCSE Bitesize: Percentage composition. Chemistry-stoichiometry revision exercises excess and limiting.