Predict the products of the following reactions and balance the equations.

Question

a) Double Replacement:  

____ BaI2 + ____ Al2(SO4)3 🡪 __________________ + __________________ 

b) Combustion:  

____ C6H14 + ____ O2 🡪 __________________ + __________________ 

c) Single Replacement:  

____ Al + ____ MgSO4 🡪 __________________ + __________________ 

d) Combination:  

____ Na + ____Cl2 🡪 __________________  

Answer 1

a) 3BaI₂ + Al₂(SO₄)₃ → 3BaSO₄ + 2AlI₃

barium iodide and aluminum sulfite react to produce barium sulfite and aluminum iodide

b) 2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

For part b, you need the general stoichiometric combustion of a hydrogen in oxygen:

C_xH_y + zO₂ → xCO₂ + (y/2)H₂O where z = x + y/4

Plug in 6 for x and 14 for y. Use the values of x and y to find z. Then you have this reaction:

C₆H₁₄ + 9.5O₂ → 6CO₂ + 7H₂O

Because the coefficient can't have a decimal, I multiply by 2 to all the coefficients in order to get strictly whole numbers. You should have 12 carbon atoms, 28 hydrogen atoms, and 38 oxygen atoms.

heptene and oxygen gas react to produce carbon dioxide and water vapor

c) 2Al + 3MgSO₄ → Al₂(SO4)₃ + 3Mg

aluminum and magnesium sulfite react to produce aluminum sulfite and magnesium

d) 2Na + Cl₂ → 2NaCl

sodium and chlorine gas react to produce sodium chloride (table salt)