Grade
in a chemical reaction, sulfuric acid and aluminium metal react
to form hydrogen gas and a salt solution of aluminium sulfate.
ben has written this equation for the reaction:
al +h, so(g) → a1,(so )3(aq) + h, (r
ben's equation is not balanced. write a balanced chemical equation for this reaction.

2Al + 3H2SO4 (g) → Al2(SO4)3 (aq) + 3H2 (g)

Explanation:

On the right side we have Al2 ( so 2x aluminium, So  on the left side we multiply Al by 2, On both sides is 2x Al now)

The formula for Sulfuric acid is H2SO4.

The result ( aluminium sulfate ) is Al2(SO4)3. Aluminium has an oxidation number of +3, SO4 has an oxidation number of -2 ( S(+6) + 4O (4x-2) : 6-8 = -2

So we have to multipy aluminium 2x and SO4 (3x) to equal.

On the right side we have 3x S, so on the right side we have to multiply H2SO4 also by 3 to get the same amount.

This results in 12x Oxygen (3xO4). Which is the same as the right side.

On the left side we have 6H ( 3xH2) so on the right side we multiply H2 by 3 to get the same amount.

So we have on both sides:

2x Al

6xH

3xS

12xO

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.