Advertisements
Advertisements
Question
On what basis is a chemical equation balanced?
Advertisements
Solution
A chemical equation is balanced based on the law of conservation of mass; it states that "matter can neither be created nor be destroyed". If the number of atoms of various elements are different on the reactants' and products' side, it means they are either destroyed or created, which violates the law of conservation of mass.
RELATED QUESTIONS
What is a chemical equation? Explain with the help of an example.
Balance the given chemical equation:
C + CO2 → CO
Balance the following equation and add state symbols:
Zn + HCI → ZnCI2 + H2
Give one example of an exothermic reaction.
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 +Cu
Write your observations and name the product when
Iron nails are added to an aqueous solution of copper sulphate.
Balance the following equation .
N2 + O2 → NO
Balance the following equation. Also name the product formed.
`"KCIO"_3 → "KCI" +"O"_2`
Balance the following equation. Also name the product formed.
K2O + H2O → KOH
Write the answer to the following.
Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
Balance the following equation:
P + HNO3 → NO2 + H2O + H3PO4
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.
Write the balanced chemical equation for this reaction.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{2H2O ->[electric][current] 2H2 + O2}\]
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Catalyst
Balance the following simple equation:
\[\ce{N2 + H2 <=> NH3}\]
Balance the following simple equation:
Mg + CO2 → MgO + C
Give a balanced equation by the partial equation method, [steps are given below].
Oxidation of Lead [II] Sulphide by Ozone
- Ozone first decomposes to give molecular oxygen & nascent oxygen.
- Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate.
Writing a chemical reaction in brief by using chemical formulae is called as _______.
Give the characteristic tests for the following gases :
- CO2
- SO2
- O2
- H2
