In this lesson, we will learn how to write a balanced chemical equation given a word equations. We have more lessons on the rules for balancing chemical equations.
Related Topics: More Chemistry Lessons
Sometimes, state symbols are required to indicate the physical states of the substances in a chemical reaction.
Here are some simple covalent formulas that you will find useful to remember
Carbon Dioxide CO2
Sulfur Dioxide or Sulphur Dioxide SO2
Here are some simple ionic formulas that you will find useful to remember
Sodium Chloride NaCl
Calcium Chloride CaCl2
Magnesium Oxide MgO
Hydrochloric Acid HCl
Sulfuric Acid or Sulphuric Acid H2SO4
Nitric Acid HNO3
Sodium Hydroxide NaOH
Potassium Hydroxide KOH
Calcium Hyroxide Ca(OH)2
Calcium Carbonate CaCO3
Aluminium Oxide Al2O3
Iron Oxide Fe2O3
In a precipitation reaction, sodium hydroxide solution is mixed with iron(II) chloride solution. Sodium Chloride solution and insoluble iron(II) hydroxide are produced. Write a balanced chemical equation including the state symbols.
Step 1: Identify reactants and products and place them in a word equation,
sodium hydroxide + iron(II) chloride → sodium chloride + iron(II) hydroxide
Step 2: Convert the chemical names into chemical formulas. Place them based on the chemical equation and write the state symbols.
Step 3: Balance the chemical equation.
2NaOH(aq) + FeCl2(aq) → 2NaCl(aq) + Fe(OH)2(s)
Write a balanced chemical equation for
Sodium(s) + hydrochloric acid(aq) → sodium chloride(aq) + hydrogen(g)
Step 1: Convert the chemical names into chemical formulas. Place them based on the chemical equation and write the state symbols.
Step 2: Balance the chemical equation.
2Na(s) + 2HCl(aq) → 2NaCl(aq) + H2(g)
How to interpret chemical symbols and how to write simple balanced equations.
Writing Chemical Equations
Practice with writing and balancing equations
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