A question of balance

 Many chemical reactions can be reversed.   When this happens we can describe a forward reaction and a back reaction. Sometimes the forward and back reaction take place at equal rates. When this happens an Equilibrium is established  Students should: 3.17 know that some reactions are reversible and this is indicated by the symbo...

 Students should: 1.3 understand how the results of experiments involving the dilution of coloured solutionsand diffusion of gases can be explained This classic demonstration is used to demonstrate diffusion rates QuestionsAnswers in this reaction the two reactants are ammonia and hydrogen chloride write down the formula of each of these compo...

An exothermic reaction

 3.1 Energetics  Students should: 3.1 know that chemical reactions in which heat energy is given out are described asexothermic, and those in which heat energy is taken in are described as endothermic Every chemical reaction has an accompanying change in energy. Some reactions release energy to the surroundings and are known as Exothermic...

Universal indicator solution can be used to indicate the acidity or alkalin

Enter your text here ... IntroductionPearson specification  A lot of everyday substances including some foods contain Acids.  You can find alkalis amongst a number of  common cleaning products.  Acids are neutralised by alkalis to form salts and water. Here we consider the ways in which these reactions can be used...