Final answer:
The chemical equation provided is incorrect, as aluminum doesn't react with water to form potassium hydroxide and hydrogen gas. Without the correct reaction, the coefficient of aluminum cannot be determined.
Step-by-step explanation:
The given chemical equation seems to be incorrect as it suggests the reaction between aluminum (Al) and water (H2O) to produce potassium hydroxide (KOH) and hydrogen gas (H2). However, Al does not react directly with H2O in this manner and KOH isn't formed directly from this reaction. The balanced reaction involving aluminum and water typically results in the formation of aluminum hydroxide and hydrogen gas, especially if not under specific conditions that involve other reactions or compounds. Since we are looking for the coefficient of Al in the provided equation, it cannot be determined from the given information. Therefore, to balance the equation accurately, one would need a correct reaction or additional context.