Answer:
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Answer:
ΔT = 0.61°C
Explanation:
That's the formula for the colligative property of freezing point depression:
ΔT = m . Kf . i
AlCl₃ is a ionic salt that be dissociated:
AlCl₃ → Al³⁺ + 3Cl⁻ i = 4
In solution, we can have 4 moles of ions, 1 mol of Al³⁺ plus 3 moles of chloride. (We assume 100 %ionization)
Let's replace data: ΔT = 0.082 m . 1.86 °C/m . 4
ΔT = 0.61°C
Answer:
they have the same number of electrons in their outer energy level
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