Chemical reaction equation
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Chemical reaction equation

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chemical reaction equation

chemical reaction equation

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Chemical reaction equation Chemical reaction equation Presentation Transcript

  • Chemical Reaction Equation Viandhika Ditama, S.pd
  • Definition chemical reactionAlso called the chemical change.Indication :1.sedimentation2.Gas forming3.Color change.
  • Naming the chemical reaction equationGenerally,reaction equation is described asfollow : aA (a) + bB(b) →cC (c) + dD (d)
  • Naming the chemical reaction equationThe following step in writing a chemical reactionequation:1. Determine the reactants and the products2. Write the atomic symbol of each substance3. Write the symbol of (+) and (→)4. Balance the number of each atom in both left and right sides.
  • Naming the chemical reaction equationThe reaction between potassium metal andchlorine gas can be decribed into chemicalreaction as follow 2K (s) + Cl2(g) →2KCl(s)
  • Balancing the chemicalequation1. Trial method Mg (s) + O2(g) →MgO(s) Mg (s) + O2(g) →2MgO(s) 2Mg (s) + O2(g) →2MgO(s)
  • Balancing the chemicalequationExample : Na (s) + H2O(l) →2NaOH(aq) + H2(g) 2Na (s) + H2O(l) →2NaOH(aq) + H2(g) 2Na (s) + 2H2O(l) →2NaOH(aq) + H2(g) 2Na (s) + 2H2O(l) →2NaOH(aq) + 2H2(g)
  • Balancing the chemicalequation2. Mathematical equation method aMg (s) + bO2(g) →cMgO(s)To equalize Mg atom : a = cTo equalize O atom : 2b = cFor instance, b=1, then c=2Add the a,b,and c value into the equation 2Mg (s) + O2(g) →2MgO(s)
  • Balancing the chemicalequationExample : H2 (g) + O2(g) →H2O(l) To equalize H atom : a = c To equalize O atom : 2b = c For instance, a=1, then c=1 2b=c 2b=1 B=1/2 Add the a,b,and c value into the equation H2 (g) + ½ O2(g) →H2O(l)