What is the atomic mass of AlCl3
Answers
Answer:
Aluminum chloride is an ionic salt, which means it is the combination of a metal ion (aluminum) and a non-metal ion (chloride). Atoms are turned into ions when the positive charge of the nucleus doesn't equal the number of electrons in that atom's electron cloud.
The chemical formula of aluminum chloride is AlCl3. Let's see why three chloride ions are needed for one aluminum ion.
A general rule in chemistry is that an atom will gain or lose electrons to have a total of eight electrons in the outermost shell of its electron cloud. Aluminum has three electrons in its outer shell, and chlorine has seven in its outer shell.
AlCl 3 in a Lewis dot diagram. The dots represent outer-shell electrons for each element.
Aluminum wants to get rid of its three electrons. This will make the next inner electron shell its outer shell, which is already full with eight electrons. Chlorine, having seven in its outer shell, has one empty space available.
So if aluminum and chlorine come close to each other, they can help each other out.
Chlorine is the greedy one in terms of electrons. Since one aluminum atom can give up three electrons, three chlorine atoms pull off those three electrons, which stabilizes the aluminum. It also stabilizes the chlorine atoms because they get their one empty spaced filled.
Three chlorine atoms take one electron each from aluminum atom
This electron transfer gives us four charged particles that stick together because opposites charges attract.
All charges add up to equal 0
As you can see, aluminum chloride has no net charge. It is neutral just like all ionic compounds. Instead of writing symbols with dots around them, we can write
Al+3 + 3Cl-1 → AlCl3
which gives us aluminum chloride's formula, AlCl3. From this formula, we can determine the molar mass of this compound.
Molar Mass
Molar mass is the mass of one mole of a substance. The mass of one mole of aluminum chloride is the sum of one mole of aluminum and three moles of chlorine.
The periodic table has the molar mass of each element, so we just need to look there and then we can organize all of the information in a chart.
The values in red are the masses of one mole of that element
Element
Quantity
Molar Mass of Element (g/mole)
Total Molar Mass in AlCl3(g/mole)
Aluminum
1
26.982
26.982
Chlorine
3
35.45
106.35
Adding the values in column number 4 we get
26.982 g/mole + 106.35 g/mole ≈ 133.33 g/mole
Depending upon number of moles we can find number of atoms given by the formula:
No.of.atoms=number of moles*Avogadro's number
i.e.
Total atoms=Number of moles* 6.022*10^23 atoms
By intelligence.
Explanation:
Hope it helps
Answer:
133.34 g/mol
Explanation:
AlCl3 is a kind of salt that is readily dissolved in water. It made up of one atom of Aluminium (Al) and 3 atoms of chloride (Cl). Molar mass of AlCl3 = atomic mass of Al + 3 atomic mass of Cl. So, molar mass of AlCl3 = 133.34 g/mole.