What in these chapters life on the raft is contrasted sharply with the violence and bloodshed Huck has recently encountered on the shore?

The peaceful, harmonic life depicted on the raft contrasts greatly with the corruption and hypocrisy Huck experiences with the Grangerfords. Huck is happy to be back on the raft, and even happier to be away from a place in which he felt suffocated and helpless. The raft, as small and cramped as it is, gives Huck a sense of freedom and control.