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IrinaVladis [17]
2 years ago
6

can anyone explain to me how to balance a chemical equation? im having trouble in understanding how i keep getting it wrong.

Chemistry
2 answers:
Virty [35]2 years ago
6 0
For example we are going to use this unbalanced chemical reaction:
H₂ + O₂ → H₂O.
First, calculate number of atoms (hydrogens and oxygens) on left and right. There is two oxygen and two hydrogen on left and two hydrogen and one oxygen on right.
You can not change molecular formula of compound, only you can put coefficient in fron of compound to balance reaction.
Put 2 in front water to balance oxygen (now you have two oxygens on left and right). But now you have four hydrogens on right, so you must put 2 in fron hydrogen on the left.
2H₂ + O₂ → 2H₂O.
Elan Coil [88]2 years ago
5 0
<span>To balance a chemical equation, one has to make the total number of molecules of each element equal on both sides of the equation.
 For example,
 in the reaction of sodium (Na) and chlorine (Cl2), we get sodium choride (NaCl)
 Na + Cl2--->NaCl
 Now one chlorine molecule contains 2 atoms of Cl and one Na molecule contains 1 atom of Na
 To balance, we have to take 2 Na molecules,
  2Na + Cl2 ---> NaCl
 Balancing both sides we get
 2Na + Cl2 = 2NaCl
 Here both sides of the chemical equation contains equal number of molecules of each element, so it is a balanced equation.</span>
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The question is incomplete, the complete question is;

AlBr3 can be used as a catalyst in the Friedel-Crafts alkylation reaction. The correct name for the compound represented by the formula AlBr3 is —

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Having known that AlBr3 is an ionic compound and aluminium is the central atom here, we now have to ask ourselves if Aluminium exists in other stable oxidation states.

We must take cognizance of the fact that the oxidation number of the central atom in a compound becomes part of the name of that compound when other stable oxidation states for atoms of the same elements exists.

Since the +3 state is the only stable oxidation state for aluminium, the name of the compound is simply aluminium bromide.

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