Before I answer your question, I think it would be helpful to explain what the "penitential rite" is. The penitential rite is part of the Introductory Rites of the Mass that come before the Liturgy...
In the Roman Catholic Church, the Penitential Rite is a part of the Introductory Rites of the Mass. The Penitential Rite is a time of reflection on one's sins and a prayer for God's mercy. While the...
Because; -it is a general confession and it frees Catholics of their sins -rite means ceremony, so it is a ceremony of forgiveness.
The penitential rite in the Mass forgives all venial sins...