Chemistry
What is a chemical equation ? Why it is necessary to balance it ?
Chemical Equation
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Answer
A chemical equation is the symbolic representation of a chemical reaction using the symbols and formulae of the substances involved in the reaction.
An equation must be balanced in order to comply with the "Law of Conservation of Matter", which states that matter is neither created nor destroyed in the course of a chemical reaction. An unbalanced equation would imply that atoms have been created or destroyed.
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Related Questions
State the number of atoms present in each of the following:
(a) PO43-
(b) P2O5
(c) H2SO4
(d) SO4-2
Depending on the number of oxygen atoms in the anions, the names of some acids and their formulae are given. Write the formula of their corresponding salts.
Acid Formula Salt Formula Perchloric acid HClO4 Sodium perchlorate NaClO4 Chloric acid HClO3 Sodium chlorate …………… Chlorous acid HClO2 Potassium chlorite …………… Hypochlorous acid HClO Sodium hypochlorite …………… State the information conveyed by the following equation.
Zn(s) + 2HCl (aq) ⟶ ZnCl2 (aq) + H2↑
What is the limitation of the reaction given in question 2?