Question

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

Answer 1

3Ca + 2AlPO4 = Ca3(PO4)2 + 2Al.

That is B

Answer 2

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

Step-by-step explanation:

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

`3Ca + 2AIPO_4 \rightarrow 2Al + Ca_3(PO_4)_2`

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