Is thw positive valence of AlCl3 1 or 3 why?
I don't know that AlCl3 has any valence. Al is +3 and Cl is -1. AlCl3 is zero charged.
Al has three electrons in the outside and it will lose those three electrons to become trivalent. Another way to look at it:
All compounds are zero. Since Cl is -1 and there are three of them for a -3 charge, then Al must be +3 to maintain a zero for AlCl3.
As + sign denote that the element have lost electrons.
The positive valence of AlCl3 is 3. To understand why, let's break down the compound AlCl3.
AlCl3 represents aluminum chloride, and it is an ionic compound composed of aluminum (Al) cations and chloride (Cl) anions. The chemical formula AlCl3 tells us that for every unit of aluminum chloride, there is one aluminum cation and three chloride anions.
In this case, the aluminum cation, Al3+, has a positive charge of +3. This is because aluminum is a Group 3 element and has three valence electrons. To achieve stability, it needs to lose these three valence electrons, resulting in a positive 3 charge.
On the other hand, chloride anions, Cl-, have a negative charge of -1. This is because chlorine is a halogen and needs to gain one electron to attain stability. Therefore, three chloride ions are needed to equalize the positive charge of the aluminum ion.
So, in AlCl3, the positive valence of aluminum is 3 because it loses three electrons to become stable.