The chemical reaction which is expressed in terms of the word (name of reactants and products) is called word equation. For example:
Sodium + Chlorine \(\longrightarrow\) Sodium Chloride
The chemical equation which is written in terms of symbols by writing their molecular formula is called formula equation. It is of two types:
An unbalanced chemical equation can be converted into a balanced equation by using following steps:
Step 1: Write the word equation.
Potassium chlorate \( \overset{Heat}{\longrightarrow}\) Potassium chloride + oxygen
Step 2: Convert the word equation into formula equation.
KClO_{3}\( \overset{\Delta}{\longrightarrow}\)KCl +O_{2}
Step 3: Count the number of atoms, ions, etc of the reactant and product and make them equal by using the suitable number in front of them.
2KClO_{3} \( \overset{\Delta}{\longrightarrow}\) 2KCl +3O_{2}
Information conveyed by balanced chemical equations
Limitations of balanced chemical equations
The skeletal equation of the given word equation is given below,
Word equation: Potassium + Oxygen → Potassium oxide
Skeleton equation: K + O_{2} → K_{2}O
Balanced equation: 4K + O_{2} → 2K_{2}O
The skeletal equation of the given word equation is given below,
Word equation: Nitrogen + Oxygen \( \overset{3000^oC}{\longrightarrow}\) Nitric Oxide
Skeleton equation: N_{2} + O_{2} → NO
Balanced equation: N_{2} + O_{2} → 2NO
The skeletal equation of given world equation is given below,
Word Equation: Ethane + Oxygen \( \overset{heat}{\longrightarrow}\) Carbon dioxide + Water
Skeleton Equation: C_{6}H_{6} + O_{2} \( \overset{\Delta}{\longrightarrow}\) CO_{2} + H_{2}
Balanced Equation: 2C_{6}H_{6} + 7O_{2} \( \overset{\Delta}{\longrightarrow}\) 4CO_{2} + 6H_{2}
The skeletal equation of given world equation is given below,
Word Equation: Silver nitrate + Sodium chloride → Silver chloride + Sodium nitrate
Skeleton Equation: AgNO_{3} + NaCl → AgCl + NaNO_{3}
Balanced Equation: AgNO_{3} + NaCl → AgCl + NaNO_{3}
The skeletal equation of given world equation is given below,
Word Equation: Zinc + Hydrochloric acid →Zinc chloride + Hydrogen
Skeleton Equation: Zn(s) + HCl(aq) → ZnCl_{2}(aq) + H_{2}(g)
Balanced Equation: Zn(s) + 2HCl(aq) → ZnCl_{2}(aq) + H_{2}(g)
The skeletal equation of the given word equation is given below,
Word equation: Calcium carbonate \( \overset{\Delta}{\longrightarrow}\) Calcium oxide + Carbon dioxide
Skeleton equation: CaCO_{3} \( \overset{\Delta}{\longrightarrow}\) CaO + CO_{2}↑
Balanced equation: CaCO_{3} \( \overset{\Delta}{\longrightarrow}\) CaO + CO_{2}↑
The skeletal equation of the given word equation is given below,
Word equation: Copper nitrate + Nitrogen dioxide + water.
Skeleton equation: Cu + HNO_{3} → Cu(NO_{3})_{2} + NO_{2} + H_{2}O
Balanced equation: Cu + 4HNO_{3} → Cu(NO_{3})_{2} + 2NO_{2} + 2H_{2}O
How many types of formula equation are there?
The chemical reaction which is expressed in terms of the word (name of reactants and products) is called
What is the balanced chemical equation for Na + Cl_{2} → NaCl?
What is the balanced chemical equation for NH_{4}Cl + Ca(OH)_{2} → CaCl_{2} + NH_{3} + H_{2}O ?
What is the balanced chemical equation for Zn(s) + HCl(aq) → ZnCl_{2}(aq) + H_{2}(g) ?
What is the balanced chemical equation for CaCO_{3} ( overset{heat}{longrightarrow}) CaO + CO_{2}↑ ?
What is the balanced chemical equation for Cu + HNO_{3} → Cu(NO_{3})_{2} + NO_{2} + H_{2}O?
The chemical equation which is written in terms of symbols and molecular formulae is called
What is the balanced chemical equation for H_{2} + O_{2} → H_{2}O ?
What is the balanced chemical equation for Na + H_{2}O → NaOH + H_{2 }?
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