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Question
What information does the following chemical equation convey?
Zn + H2SO4 → ZnSO4+ H2
Solution
This equation conveys the following information:
The actual result of a chemical change.
Substances take part in a reaction, and substances are formed as a result of the reaction.
Here, one molecule of zinc and one molecule of sulphuric acid react to give one molecule of zinc sulphate and one molecule of hydrogen.
Composition of respective molecules, i.e. one molecule of sulphuric acid contains two atoms of hydrogen, one atom of sulphur and four atoms of oxygen.
Relative molecular masses of different substances, i.e. molecular mass of
Zn = 65
H2SO4 = (2+32+64) = 98
ZnSO4 = (65+32+64) = 161
H2 = 2
22.4 litres of hydrogen are formed at STP.
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