Question

charge on 1 gram of Al ³⁺ ions is ____. (e=electronic charge)

Answer 1

The molar mass of Al is 27 g. The mass is almost same after the formation of ion.
27 g of Al³⁺ ion = 1 mol of Al³⁺ ion = 6.022 x 10²³ ions of Al³⁺
1 g of Al³⁺ ion = 6.022 x 10²³ / 27 atoms of Al³⁺
Charge on one atom Al³⁺ = 3e C
So charge on 1g ion of Al³⁺ ion would be = 3× 6.022 x 10²³ ions of Al³⁺ /27​ e C
= 1/9 × 6.022 x 10²³ e coulomb
= 1/9 x N_Ae coulomb