Question

1. What is a chemical equation? Why it is necessary to
balance it?
2. State the information conveyed by the following equation.
Zn(s) + 2HCI (aq) → ZnCl2 (aq) + H2T
3. What is the limitation of the reaction given in question 2.
4. Write chemical equations for the following word equations
and balance them.
(a) Carbon + Oxygen Carbon dioxide
(b) Nitrogen + Oxygen → Nitrogen monoxide
(c) Calcium + Nitrogen → Calcium nitride
(d) Calcium oxide + Carbon dioxide → Calcium carbonate
(e) Magnesium + Sulphuric acid → Magnesium sulphate
+ Hydrogen
(f) Sodium reacts with water to form sodium hydroxide
and hydrogen.
Balance the following equations :
(a) Fe + H20 FeO,+H,
(b) Ca+N, → Can
(c) Zn + KOH → K, ZnO, +H,
(d) Fe,0, +CO → Fe + CO,
(PbO + NH, → Pb + H,0 +N,
(f) Pb, O. PbO +02
(9) PbS + 0, → PbO + SO,
(B) S+H,SO, SO, +HO
S + HNO, H.SO. + NO +HO
) MnO, + HCl → MnCl, +H,O+CI,
(k) C + H,SO, CO, +H,O+SO,
((1) KOH+Cl, → KCI + KCIO + H2O
{m) NO, +H,
OHNO, + HNO,
Pb;0, + HCl → PbCl, + H,0 +CI,
(6) H.O+Cl, HCI + O,
py NaHCO, N,CO, +H,O + CO2
(9) HNO, +H,
SNO, +H,0 + S
P + HNO, NO, + H2O + H,PO
(5) Zn + HNO, Zn(NO), +H,O+NO,
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Answer 1

Answer:

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side. ... The first chemical equation was diagrammed by Jean Beguin in 1615