In the given chemical equation, What is the missing coefficient to balance the equation?1 PCl5 + 4 H2O → ____  HCl + 1 H3PO4

To balance the given chemical equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The equation is: 1 PCl5 + 4 H2O → ____ HCl + 1 H3PO4

First, let's count the number of atoms for each element on both sides:

On the left side, we have:

• 1 atom of Phosphorus (P)
• 5 atoms of Chlorine (Cl)
• 8 atoms of Hydrogen (H)
• 4 atoms of Oxygen (O)

On the right side, we have:

• 1 atom of Phosphorus (P)
• 1 atom of Chlorine (Cl)
• 3 atoms of Hydrogen (H)
• 4 atoms of Oxygen (O)

We can see that the number of Chlorine and Hydrogen atoms on the right side is less than on the left side.

To balance the Chlorine atoms, we need to multiply HCl by 5 on the right side.

The equation now looks like this: 1 PCl5 + 4 H2O → 5 HCl + 1 H3PO4

Now, let's count the Hydrogen atoms again:

On the left side, we have 8 Hydrogen atoms (from 4 H2O), and on the right side, we have 5 Hydrogen atoms (from 5 HCl) + 3 Hydrogen atoms (from 1 H3PO4), which equals 8 Hydrogen atoms.

So, the balanced equation is: 1 PCl5 + 4 H2O → 5 HCl + 1 H3PO4

Therefore, the missing coefficient for HCl is 5.