Plenary on chemical equation

What is a coefficient?

• The small number on the right of the chemical symbol.

• The large number in front of a chemical formula.

• The number in between the chemical symbols.

• The number behind a chemical formula.

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient

• Subscript

• Atom

• Nucleus

Balance the given chemical equation.

_Al +_HCl --> _H₂ +_AlCl₃

• 2, 6, 3, 2

• it is already balanced

• 4, 12, 3, 4

• 2, 1, 4, 5

Which of the following equations is not balanced?

• CaCO3 --->   CaO + CO2

• 2NaHCO3 + H2SO4----> Na2SO4 + 2H2O + CO2

• 2NO + O2----->     2NO2

• 2Mg + O2----->    2MgO

What is the coefficient of ammonia gas after balancing the following equation?

N2(g) + H2(g) → __NH3(g)

• 2

• 4

• 3

• 1

Choose the correct balanced equation

___ SnO₂ + ___ H₂ → ___ Sn + ___ H₂O

• • 2 SnO₂ + 2 H₂ →

  • 2 Sn + H₂O

• • SnO₂ + 2 H₂ → Sn + 2 H₂O

• SnO₂ + H₂ → Sn + 2 H₂O

• 2 SnO₂ + H₂ → 2Sn + H₂O

Balance the equation

FeS + O₂ → Fe₂O₃ + SO₂

• 2,1,2,2

• 4,2,2,4

• 2,3,2,2

• 4,7,2,4

Choose the correct equation.

TiCl₄ + H₂O → TiO₂ + HCl

• • TiCl₄ + 2 H₂O → TiO₂ + 2 HCl

• • TiCl₄ + 2 H₂O → TiO₂ + 4 HCl

• 2TiCl₄ + H₂O →

  2TiO₂ + HCl

• TiCl₄ + 4 H₂O → TiO₂ + 4 HCl

Fill in the blanks with correct coefficients to balance the equation.

__Na₃PO₄ + __HCl → __NaCl + __H₃PO₄

Balance the equation

__ AgI + __Na₂S → __ Ag₂S + __NaI