Sure, I would like to see the verses that counteract James 2:17.
The sacraments are in interesting topic in this issue. Baptism, in the Church, is the ritual cleansing of our souls form Original Sin, inherited from Adam and Eve. Through Baptism, we can be truly connected to Christ, as we have gotten rid of Original Sin, and have Sanctifying Grace. The only people born without original sin are Jesus and Mary.
Reconciliation is the act of bringing amends to God, as our souls will fall to Satan's lies and temptations, and is a way of bringing us closer to God. In the Church, we believe that God wants us to participate in spreading his Word and being proactive in spiritual life, and to experience him in all five senses; sight, touch, smell, sound, and taste.
Communion is an essential part of Mass, which fulfills the five senses. Catholics believe that when the priest consecrates the bread, it becomes the true body of Christ, not figuratively, but literally. When we consume this, we are consuming Christ, and becoming part of him. Unfortunately, some Catholics have fallen away from this aspect, and do not think it is real, which we are working to bring back.
Marriage is the binding of a man and woman in holy matrimony, since they complement each other, as said in 1 Corinthians 12. They are permanently apart, and only through death are they separated. Annulments can happen, called a "Catholic divorce," but are very rare.
Holy Orders is becoming "married" to the Church, and becoming the people who do the work of Christ with his hands. Last Rites are the last sacrament to be taken, and are taken when a person is about to die. In cases where the patient is unable to speak, the priest will absolve their sins, and do the Rites for them.
The Papacy is the leader of the Church, which came from Peter, the first Pope, or Bishop of Rome. Protestants cast this into doubt, saying there is no reliable record of Peter entering Rome, as Loraine Boettner states, but the Ecclesiastical History in Loeb Classical Library states this explicitly.