Extra questions practice
Chemical equations
Write the chemical equations for the following reactions:
1) Hydrogen reacts with oxygen to form water
2H2+2O----->2H2O
2) Magnesium reacts with hydrochloric acid (HCl) to form magnesium chloride and
hydrogen
Mg+2HCl------>MgCl2+H2
3) Sodium reacts with water to form sodium hydroxide and hydrogen
2Na+2H2O----->2NaOH+H2
4) Calcium carbonate reacts with hydrochloric acid to form calcium chloride, carbon
dioxide, and water
CaCO3+2HCl---->CACl2+CO2+H2O
5) Zinc oxide reacts with sulfuric acid (H₂SO₄) to form zinc sulfate and water
ZnO+H2SO4----->ZnSO4+H2O
6) Potassium nitrate breaks down to form potassium nitrite and oxygen
2K+(NO3)2----->2KNO2+O2
Dr. Mohammed Hassan
1
MOB: +20 1152394436
Extra questions practice
Chemical equations
7) Copper (II) oxide reacts with nitric acid (HNO₃) to form copper (II) nitrate and water
CuO+2HNO3---->CU(NO3)2+H2O
8) Hydrochloric acid (HCl) reacts with sodium hydroxide to form sodium chloride and
water
NaOH + HCl---->NaCl+H2O
9) Carbon burns in oxygen to form carbon dioxide
C2+2O2------>2CO2
10)
Iron reacts with sulfur to form iron (ll) sulfide
Dr. Mohammed Hassan
2
MOB: +20 1152394436