How many moles of aluminum are needed to react completely with 1.2 mol of feo

Explanation:

1) Word reaction:

This is a single replacement reaction, in which aluminum, a more acitve metal than iron, replaces the iron in the ferrous oxide to form aluminum oxide and iron.

2) Skeleton chemical equation:

3) Balanced chemical equation:

Add the coeffcients to comply with the law of conservation of mass:

4) Mole ratio of Al and FeO:

5) Set a proportion with the unkown and solve:

i think it is true since you can test the answer and can use observations to complete it.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l