If so, why do scriptures state that remission of sin is directly associated with water baptism?
Acts 22:16
16 And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord.
Excellent article on Acts 22:16 -
https://kentbrandenburg.blogspot.com/2015/03/acts-2216-baptism-essential-for.html
Acts 2:38
...be baptized every one of you in the name of Jesus Christ for the remission of sins
In Acts 2:38, "for the remission of sins" does not refer back to both clauses, "you all repent" and "each one of you be baptized," but refers only to the first. Peter is saying "repent unto the remission of your sins," the same as in Acts 3:19. The clause "each one of you be baptized" is parenthetical. This is exactly what Acts 3:19 teaches except that Peter omits the parenthesis.
*Also compare the fact that these Gentiles in Acts 10:45 received
the gift of the Holy Spirit (compare with Acts 2:38 -
the gift of the Holy Spirit) and this was
BEFORE water baptism (Acts 10:47).
In Acts 10:43 we read
..whoever believes in Him receives remission of sins. Again, these Gentiles received
the gift of the Holy Spirit - Acts 10:45 -
when they believed on the Lord Jesus Christ - Acts 11:17 - (compare with Acts 16:31 -
Believe on the Lord Jesus Christ and you will be saved)
BEFORE water baptism - Acts 10:47. This is referred to as
repentance unto life - Acts 11:18.
*So the only logical conclusion
when properly harmonizing scripture with scripture is that faith in Jesus Christ "implied in genuine repentance" (rather than water baptism) brings the remission of sins and the gift of the Holy Spirit (Luke 24:47; Acts 2:38; 3:19; 5:31; 10:43-47; 11:17,18; 15:8,9; 16:31; 26:18). *Perfect Harmony*
Luke 3:3
3 And he came into all the country about Jordan, preaching the baptism of repentance for the remission of sins;
This baptism was in regards to/on the basis of the remission of sins received upon repentance. In Matthew 3:11, we read - "I baptize you with water for repentance." Now did John baptize with water "in order to obtain" repentance or "in regards to/on the basis of" repentance? Obviously the latter. Baptizing someone "in order to obtain" repentance does not make sense. We "repent first" and are then water baptized "afterwards."
Luke 24:47
47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
*Notice "repentance and remission of sins". So what happened to baptism here?
Acts 19:4-5
4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus. 5 When they heard this, they were baptized in the name of the Lord Jesus.
In Acts 19:2, Paul asked them
if they had received the Holy Spirit when they believed? and their answer in verse 3 reveals that they were not yet believers. They had received the baptism of John but did not realize that Jesus Christ was the One to whom John's baptism pointed. Paul gave them instructions about Jesus and after they believed Paul's presentation of the gospel and came to saving faith in Christ, they were then baptized in the name of the Lord Jesus. Paul laid hands on them to receive the Holy Spirit (which was not the case in Acts 2 and Acts 10 and is the exception, not the rule). It did signify their inclusion into the church. Apostles were also present when the Samaritans (chapter 8) were included. God's purpose was to emphasize unity in the church.