Oxygen does not occur as oxygen atoms (O) but as oxygen molecules (O2) and so the above reaction should be written with oxygen molecule and then balanced as:
2H2 + O2→2H2O.
Balance the following chemical equations:
(i) NaOH + H2SO4 → Na2SO4 + H2O
(ii) HNO3 + Ca(OH)2 → Ca(N03)2 + H2 O
(iii) FeCl2 + H2S → HCl + FeS
What information is available from the following equation:
CaCO3 + 2HCl→ CaCl2 + H2O+ CO2
Write and balance the following equations presented to you as written statements:
(i) Magnesium carbonate plus hydrochloric acid produces magnesium chloride plus water plus carbon dioxide gas.
(ii) Aluminium plus chlorine gas produces aluminium trichloride.
(iii) Nitrogen plus hydrogen produces ammonia.
(iv) Calcium plus sulphur produces calcium sulphide.
(v) Magnesium burns in CO2 to form magnesium oxide and carbon.
Complete and balance the following equations:
(i) NaOH +................→ Na2SO4 + H2O
(ii) Ca(OH)2 +................ → CaCO3 + H2O
(iii) ................ + HCl(aq) → MgCl2(aq) +.................
(iv) ................ + Na2SO4(aq) → BaSO4(s) + NaCl(aq)
Mock Test Series
