assertion and reason -assertion empirical formula and molecular formula of NaHCO3 are same. Reason- upon heating and
NaHCO3 evolves CO2 gas
Answers
The assertion and reason both are correct but the reason is not the correct explanation of assertion.
Assertion : empirical formula and molecular formula of NaHCO₃ are same.
Reason : upon heating, NaHCO₃ evolves CO₂ gas.
Concepts :
- empirical formula is the simplest formula of a compound which shows the simplest ratio of the elements present in the compound. for example, empirical formula of H₂O₂ is HO because simplest ratio of 2 : 2 is 1 : 1 and hence HO is empirical of H₂O₂.
- Molecular formula is the formula which shows the actual no of atoms of elements present in the compound. It represents the information about the chemical proportions of atoms that constitute a particular chemical compound. Like, molecular formula of hydrogen peroxide is H₂O₂.
A NaHCO₃ molecule forms with the help of two ions Na⁺ and HCO₃⁻ ion. Their charge ratio is 1 : 1 , so the molecular formula is NaHCO₃.
From the definition of empirical formula, it is the simplest ratio of constituent substances. And the relation between molecular formula and empirical formula is,
molecular formula = n × empirical formula.
It means, empirical formula is the simplest form of molecular formula. but NaHCO₃ is already in the simplest form. hence, its empirical is also NaHCO₃.
Therefore the empirical formula and molecular formula of NaHCO₃ are same. hence assertion is correct.
Heating of NaHCO₃ gives,
2NaHCO₃ ⇒ Na₂CO₃ + H₂O + CO₂ ↑
It is clear that, after heating of NaHCO₃, It evolves CO₂ gas.
Hence, reason is also correct. but the reason is not the correct explanation of assertion.
Therefore the assertion and reason both are correct but the reason is not the correct explanation of assertion.
Also read similar questions : An optically compound " X " having molecular formula C4H8O3 evolves CO2 with NaHCO3 . The compound " X " on treatment wi...
https://brainly.in/question/2929737
assertion following are the structural isomers of butane reason structural isomers have the same molecular formula but t...
https://brainly.in/question/14124402
#SPJ3