In the 100 m breaststroke, Italian swimmer Fabio Scozzoli broke Igor Borysik's championship record of 57.74 with a time of 57.60.
Mireia Belmonte Garcia of Spain won two gold medals, one in the 200 m butterfly and the 400 m individual medley, both times were championship records.
Several semifinals were scheduled and Gao Chang of China broke the championship record in the women's 100 m backstroke race in 56.58, while Mihail Alexandrov from the United States did the same in the men's 100 m breaststroke in 57.18.
Ryan Lochte marked his third one with a 4:01.76 in the 400 m individual medley, Therese Alshammar from Sweden followed him with a championship record in the 50 m butterfly.
In the men's 4x200 m freestyle relay, Russia smashed the previous world record held by Canada with a time of 6:49.04.
In the women's 50 m butterfly semifinals, Felicity Galvez from Australia broke Alshammar's championship record she set in the morning.
Katie Hoff from the United States recorded another one with a time of 3:57.07 in the 400 m freestyle final, while César Cielo Filho won the fastest event of the competition in 20.51.
César Cielo Filho won his second gold medal over Men's 100 m freestyle in 45.74, Zhao Jing from China set a new record in 26.27 at the Women's 50 m backstroke final.
Felicity Galvez set a new record over Women's 100 m butterfly in 55.43, Felipe Silva followed in a time of 25.95 over Men's 50 m breaststroke.