The Spaniard stroked away a penalty two minutes after halftime after Arsenal substitute Serge Gnabry was chopped down by Adlene Guedioura.
Palace, who parted company with manager Ian Holloway on Wednesday after losing seven of their first eight matches of the season, had few opportunities even when Arteta was red-carded on 65 minutes for a foul on former Arsenal striker Marouane Chamakh.
Joel Ward came closest for Palace when he struck the crossbar but Olivier Giroud settled any Arsenal jitters with a headed second goal late on. A Luis Suarez hattrick summed with Daniel Sturridge’s goal helped Liverpool beat West Bromwich Albion 4-1.
Manchester United beat Stoke City 3-2 to keep the pressure off David Moyes. Aston Villa lost 0-2 to Everton at home.
Palace, who parted company with manager Ian Holloway on Wednesday after losing seven of their first eight matches of the season, had few opportunities even when Arteta was red-carded on 65 minutes for a foul on former Arsenal striker Marouane Chamakh.
Joel Ward came closest for Palace when he struck the crossbar but Olivier Giroud settled any Arsenal jitters with a headed second goal late on. A Luis Suarez hattrick summed with Daniel Sturridge’s goal helped Liverpool beat West Bromwich Albion 4-1.
Manchester United beat Stoke City 3-2 to keep the pressure off David Moyes. Aston Villa lost 0-2 to Everton at home.