CHM-1045 Lecture Notes - Lecture 6: Chemical Equation, Spectator Ion, Ionic Compound
17 Nov 2017
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Chm 1045- lecture 6- balancing equation and solution. Both the reactant and the product side has the same amount of atoms. To ensure the law of conservation of mass. In order to balance the equation, we use the smallest whole number coefficient. Ex: 2 h2o------- 2h2 + o2 this is balanced. Tips to balancing equation: balance the compound first, balance hydrogen or oxygen next, balance monatomic element. Ionic compound are always dissociate when dissolved into their respective ions. During a chemical equation we use abbreviation to represent the state of the compound in parentheses. Molecular equation is the full equation without any dissociation. Ex: agno3(aq) + kcl (aq)------ agcl(s) + kno3(aq) Ionic equation is when the compound dissociate into ions. Only the aqueous compound dissociate in a chemical reaction. Ex: ag+ + no3- + k+ + cl- ------ agcl(s) + k+ + no3- Spectator ions are ions who does not participate in the reaction.
