give 15 examples of Balanced chemical equations
Answers
Answer: In chemistry, it's important to be able to recognize when equations are balanced, when they are not balanced, and how to balance them.
A balanced equation contains the same number of each type of atoms on both the left and right sides of the reaction arrow.
To write a balanced equation, the reactants go on the left side of the arrow, while the products go on the right side of the arrow.
Coefficients (number in front of a chemical formula) indicate moles of a compound. Subscripts (numbers below an atom) indicate the number of atoms in a single molecule.
To calculate the number of atoms, multiply the coefficient and the subscript. If the atom appears in more than one reactant or product, add together all the atoms on each side of the arrow.
If there is only one mole or one atom, then the coefficient or subscript "1" is implied, but is not written.
A balanced equation is reduced to the lowest whole number coefficients. So, if all the coefficients can be divided by 2 or 3, do this before finalizing the reaction.
6 CO2 + 6 H2O → C6H12O6 + 6 O2 (balanced equation for photosynthesis)
6 carbon dioxide + 6 water yields 1 glucose + 6 oxygen
2 AgI + Na2S → Ag2S + 2 NaI
2 silver iodide + 1 sodium sulfide yields 1 silver sulfide + 2 sodium iodide
Ba3N2 + 6 H2O → 3 Ba(OH)2 + 2 NH3
3 CaCl2 + 2 Na3PO4 → Ca3(PO4)2 + 6 NaCl
4 FeS + 7 O2 → 2 Fe2O3 + 4 SO2
PCl5 + 4 H2O → H3PO4 + 5 HCl
2 As + 6 NaOH → 2 Na3AsO3 + 3 H2
3 Hg(OH)2 + 2 H3PO4 → Hg3(PO4)2 + 6 H2O
12 HClO4 + P4O10 → 4 H3PO4 + 6 Cl2O7
8 CO + 17 H2 → C8H18 + 8 H2O
10 KClO3 + 3 P4 → 3 P4O10 + 10 KCl
SnO2 + 2 H2 → Sn + 2 H2O
3 KOH + H3PO4 → K3PO4 + 3 H2O
2 KNO3 + H2CO3 → K2CO3 + 2 HNO3
Na3PO4 + 3 HCl → 3 NaCl + H3PO4
TiCl4 + 2 H2O → TiO2 + 4 HCl
C2H6O + 3 O2 → 2 CO2 + 3 H2O
2 Fe + 6 HC2H3O2 → 2 Fe(C2H3O2)3 + 3 H2
4 NH3 + 5 O2 → 4 NO + 6 H2O
B2Br6 + 6 HNO3 → 2 B(NO3)3 + 6 HBr
4 NH4OH + KAl(SO4)2·12H2O → Al(OH)3 + 2 (NH4)2SO4 + KOH + 12 H2O
Explanation: