Atom Perak Mempunyai 2 Isotop yaitu 107Ag dan 109Ag. Jika massa rata-rata atom Ag = 107,88 . Tentukan presentase masing-masing isotop Ag !
Annung
Misal: presentase isotop ¹⁰⁷Ag = p % maka: presentase isotop ¹⁰⁹Ag = (100-p) % jawab: Massa rata-rata atom Ag = (p% x 107) + ((100-p)% x 109) 107,88 = ( x 107) + ( x 109) = 1,07 p + 109 - 1,09 p = 109 - 0,02 p - 0,02 p = 107,88-109 -0,02 p = -1,12 p = p = 56
presentase isotop ¹⁰⁷Ag = p %
maka:
presentase isotop ¹⁰⁹Ag = (100-p) %
jawab:
Massa rata-rata atom Ag = (p% x 107) + ((100-p)% x 109)
107,88 = ( x 107) + ( x 109)
= 1,07 p + 109 - 1,09 p
= 109 - 0,02 p
- 0,02 p = 107,88-109
-0,02 p = -1,12
p =
p = 56
jadi,:
presentase isotop ¹⁰⁷Ag = 56 %
presentase isotop ¹⁰⁹Ag = 44 %