Electrical potential is the amount of energy that is available to do what?

The electric potential energy is required to move the charge against the electric field.

Explanation:

Electric potential may be defined as the amount of energy required to move the charge from one point to another in the electric field. Electrical potential is the measure of energy available per unit charge.

The electric potential is used in the oxidation and reduction reactions of a chemical substances. This potential moves the ions in the electric field during an oxidation-reduction reaction.

Thus, the electric potential is the amount of energy available used to move the charge particle.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2