The one definition of an equivalent weight that I know is that it is the amount of electrons which a substance gains or loses per mole.
Al3+ has +3 charge
therefore it loses 3 e-, so we can say that there are 3 equivalent weights in 1
mol Al3+.
1 mol Al3+ = 3 eq. wts.
1 mol Al x (27 g / 1 mol ) x (1 mol / 3 eq.wts.) = 9.0 g = 1
eq.wt.
Answer:
5.0 g Al3+ x (1 eq.wt. / 9.0 g) = 0.56 eq.wts.
The number of equivalents present in 5 g of [tex]\rm Al^3^+[/tex] are 0.56.
Equivalent weight is the number of electrons gained or lost per mole by a material.
As [tex]\rm Al^3^+[/tex] has a +3 charge, it loses 3 electrons, resulting in 3 equivalent weights in 1 mol [tex]\rm Al^3^+[/tex].
1 mole [tex]\rm Al^3^+[/tex]= 3 equivalent weight [tex]\rm Al^3^+[/tex]
1 mole Al = 27 g
Number of equivalent = [tex]\rm \dfrac{27}{3}[/tex]
Number of equivalent = 9 in 1 mole.
27 grams = 9 equivalents
5 grams = 0.56 equivalent.
Thus, 5 grams of [tex]\rm Al^3^+[/tex]has been 0.56 equivalent.
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