With Napoli beating Genk to also advance, Liverpool knew it would need at least a draw.
Salah's goal was his 11th for Liverpool this season and took him to 20 Champions League goals for the club.
The Dutch club lost 1-0 at home to Valencia to drop from first place to third in Group H and fall into the Europa League.
Inter Milan striker Lautaro Martinez battles for possession against Barcelona.
Within two minutes of Keita's breakthrough, however, Salah got his goal - and he did so courtesy of a breathtakingly hard piece of technique.
It is hard to say whether Minamino would break into the starting XI, but he would certainly serve as an attacking option should Liverpool seek a boost from the bench.
It was the Reds' second of the night and helped to ensure they would finish as Group E winners. While it was a procession for Napoli, Liverpool found it much tougher.
He shot straight at the goalkeeper with his weaker right foot when Maximilian Wober failed to deal with Dejan Lovren's long ball and then dragged wide with his left when Keita teed him up with a square pass.
Opec says it pumped less oil in November
Brent futures LCOc1 fell 48 cents to 63.86 dollars per barrel by 1220 GMT, set for their biggest daily fall since December 2. At 447.9 million barrels, crude stocks were about 4% above the five-year average for this time of year, the EIA said .
The 24 year old Japanes player enjoyed two excellent performances against the reds in this season's Champions League group stage.
Roberto Firmino battles for possession with Jerome Onguene.
Looking at the positives, it must be remembered that Liverpool have not lost a single two legged European tie under the management of Jurgen Klopp and this season, we are the only remaining unbeaten team in the continent's top five leagues.
"They started so direct".
"That he kept going is the most important thing". We were ready to defend it. It was a very tense game.
Inter then missed possibilities to attain a second and Ansu Fati confirmed them the way in which, the substitute netting an 86th-minute victor to stun the house aspect and grow to be the youngest ever goalscorer within the Champions League at 17 years and 40 days.
Tammy Abraham, with a deft backheeled flick, and Cesar Azpilicueta scored Chelsea's first-half goals against already-eliminated Lille, which pulled one back late on through Loic Remy - a former Chelsea player. We could have scored six or seven.
Juergen Klopp's side needed a point in Austria to be sure of qualification and after missing several good chances in the first half, they ended up with a comfortable win which should have been by a more convincing margin.