* To create dramatic tension. By splitting the episode into two scenes, Shakespeare can build suspense and anticipation. In the first scene, we see Prince Hal resisting his father's attempts to pressure him into becoming a responsible leader. In the second scene, we see him finally making a choice to change his ways. This creates a sense of drama and conflict that keeps the audience engaged in the story.
* To develop Prince Hal's character. The two scenes allow Shakespeare to show us different aspects of Prince Hal's character. In the first scene, he seems irresponsible and carefree, but in the second scene, he shows that he is capable of great wisdom and strength. This development helps us to understand Prince Hal as a complex and well-rounded character.
* To comment on the nature of power. The episode of Prince Hal's choice also allows Shakespeare to comment on the nature of power. In the first scene, we see how King Henry IV is able to use his power to manipulate and control others. In the second scene, we see how Prince Hal uses his power to make positive changes in the world. This contrast highlights the different ways that power can be used and abused.
Ultimately, Shakespeare's decision to split the episode of Prince Hal's choice into two scenes is a deliberate one that serves a number of dramatic and thematic purposes.