The following chemical equation is not balanced.
ca + aipo4 — al + caz(po4)2
when the equation is balanced, what is the coefficient for pure aluminum
(ai)?
a) 1
b) 2
c) 4
d 8

The stoichiometric coefficient of aluminium is 2 that is option B is correct.

Explanation:

Stoichiometric coefficient is the numeral coming or written before the symbol of compound or an element in balanced chemical reaction equation.

According to stoichiometry, 3 moles of calcium reacts with 2 moles of aluminum phosphate to give 2 moles of aluminium and 1 mole of calcium phosphate.

The stoichiometric coefficient of calcium is = 3

The stoichiometric coefficient of aluminum phosphate = 3

The stoichiometric coefficient of aluminium  = 2

The stoichiometric coefficient of calcium  phosphate  = 1