Balancing Equations Interactive Bonding activity @ learner.org.

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Balancing Equations Interactive Bonding activity @ learner.org

Valency Table Table 1.5: A Valency Table Positive ions Negative ions Name Valence no. Valence Sign Symbol Aluminium 3 + Al3+ Bromide 1 - Br- Ammonium NH4- Carbonate 2 CO32- Barium Ba2+ Chloride Cl- Calcium Ca2+ Fluoride F- Chromium III Cr3+ Hydrogen carbonate (bicarbonate) HCO3- Copper Cu2+ Hydroxide OH- Gold Au3+ Iodide I- Hydrogen H+ Nitrate NO3- Iron II Fe2+ Oxide O2- Iron III Fe3+ Phosphate PO43- Lead Pb3+ Sulfate SO42- Magnesium Mg2+ Sulfide S2- Nickel Ni2+   Potassium K+ Silver Ag+ Sodium Na+ Zinc Zn2+

COMPLETE THIS TABLE Chloride Cl1- Nitrate NO31- Hydroxide OH1- Sulfate Valence 1- Valence 2- Chloride Cl1- Nitrate NO31- Hydroxide OH1- Sulfate (SO4) 2- Carbonate CO32- Oxide O2- Valence 1+ Sodium Na1+   Potassium K+1 Silver Ag+1 Example Silver Nitrate AgNO3 Not Known Ammonium (NH4)+1 Ammonium Carbonate (NH4)2CO3 Valence 2+ Barium Ba+2 Calcium Ca+2 Calcium Nitrate Ca(NO3)2 Magnesium Mg+2 Magnesium Sulfate MgSO4 Zinc Zn+2 Iron Fe+2 (ferrous) Lead Pb+2 Copper Cu+2 Valence 3+ Aluminium Al+3 Iron Fe+3 (ferric) Iron Hydroxide FeOH3 Iron Sulfate Fe2(SO4)3

Example of balancing chemical equations Word Equation   Sodium chloride and Copper sulphate produces Sodium sulphate and copper chloride. Chemical Reaction Reactants Products   Element  Na Cl +  Cu  SO4 =  Cl  Ion  Na+ Cl-  Cu2+  SO42-  +   Cu2+  Cl- Balanced Ionic Compounds   NaCl  CuSO4  Na2SO4  CuCl2 Balanced Equations  Number  Ionic Compound Ionic Compound 2  NaCl 1 CuSO4 Na2SO4 CuCl2

Sodium Chloride and Copper Sulphate Element   +  Ion Balanced Ionic Compounds    Na Cl Cu SO4 Na+ Cl- Cu2+ SO42- NaCl CuSO4

Sodium Sulphate and Copper Chloride Element   +  Ion Balanced Ionic Compounds    Na SO4 Cu Cl Na+ SO42- Cu2+ Cl- Na SO4 CuCl 2 2

Chemical Reaction Reactants Word Equation    Chemical Reaction Reactants Products Element + =  Ion  + Balanced Ionic Compounds    Balanced Equations  Number  Ionic Compound Ionic Compound

Chemical Reaction Reactants Word Equation    Chemical Reaction Reactants Products Element + =  Ion  + Balanced Ionic Compounds    Balanced Equations  Number  Ionic Compound Ionic Compound

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