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The thermite reaction is a highly exothermic process where aluminum reacts with iron(III) oxide to form iron and aluminum oxide. This reaction is used in applications requiring extremely high temperatures, such as welding metals or cutting through steel.

Let's break down the balanced chemical equation for this reaction. The unbalanced equation is:

• Al + Feâ‚‚O₃ → Fe + Alâ‚‚O₃

To balance it, we start with the aluminum atoms:

• Add a coefficient of 2 in front of Al to balance the aluminum atoms: 2Al.

Next, we balance the iron atoms:

• Add a coefficient of 2 in front of Fe to match the number of iron atoms from Feâ‚‚O₃.

Thus, the balanced equation becomes:

• 2Al + Feâ‚‚O₃ → 2Fe + Alâ‚‚O₃

This balanced equation shows that 2 moles of aluminum react with 1 mole of iron(III) oxide to produce 2 moles of iron and 1 mole of aluminum oxide.

The water gas reaction, known for producing a mixture of gases like carbon monoxide and hydrogen, involves carbon reaction with water at high temperatures. This mixture was historically used as a fuel because of its high energy content.

Here’s how we balance this reaction. The given unbalanced chemical equation is:

• C + Hâ‚‚O → CO + Hâ‚‚

Thankfully, this equation is already perfectly balanced. It reflects one molecule of carbon reacting with one molecule of water to yield one molecule of carbon monoxide alongside one molecule of hydrogen gas.

Since the same number of each atom type exists on both sides, the balanced equation keeps the reaction simple. This simplicity makes it useful in generating syngas (synthetic gas) for various industrial applications.

In the process of producing ultrapure silicon for semiconductors, silicon tetrachloride reacts with magnesium. This chemical reaction yields silicon and magnesium chloride as products.

The initial unbalanced equation is:

• SiClâ‚„ + Mg → Si + MgClâ‚‚

To balance the chlorine atoms, note that there are 4 chlorine atoms in SiClâ‚„. Therefore, place a coefficient of 2 in front of MgClâ‚‚, yielding 4 chlorine atoms:

• SiClâ‚„ + 2Mg → Si + 2MgClâ‚‚

Now, the magnesium atoms are also balanced, with 2 atoms on each side. This gives us the balanced equation, ensuring both sides of the equation contain the same number of each type of atom. This reaction is key to preparing silicon for use in the electronics industry, which demands materials of the highest purity.