Chemical reaction equation


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chemical reaction equation

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Chemical reaction equation

  1. 1. Chemical Reaction Equation Viandhika Ditama, S.pd
  2. 2. Definition chemical reactionAlso called the chemical change.Indication :1.sedimentation2.Gas forming3.Color change.
  3. 3. Naming the chemical reaction equationGenerally,reaction equation is described asfollow : aA (a) + bB(b) →cC (c) + dD (d)
  4. 4. 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.
  5. 5. Naming the chemical reaction equationThe reaction between potassium metal andchlorine gas can be decribed into chemicalreaction as follow 2K (s) + Cl2(g) →2KCl(s)
  6. 6. Balancing the chemicalequation1. Trial method Mg (s) + O2(g) →MgO(s) Mg (s) + O2(g) →2MgO(s) 2Mg (s) + O2(g) →2MgO(s)
  7. 7. 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)
  8. 8. 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)
  9. 9. 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)