Did Judas Iscariot know that Jesus would be killed when he turned Jesus over to the Pharisees? The scriptures show that Judas betrayed Jesus, but did he positively know what the outcome was to be? Even the apostles did not understand fully what Jesus was trying to teach them. 

References: Luke 22:3,4 | Acts 1:6,7
It is difficult to believe that Judas Iscariot would not have known the priests intended to have Jesus killed. After all, their willingness to pay thirty silver coins, a small fortune at a time when peasants generally only used the lesser bronze coins, was clear evidence of foul intent.

However, Matthew's Gospel portrays Judas as suffering considerable remorse after the death of Jesus, suggesting that he might not have known that this would be the outcome of his betrayal:


  Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders, Saying, I have sinned in that I have betrayed the innocent blood. And they said, What is that to us? see thou to that.  And he cast down the pieces of silver in the temple, and departed, and went and hanged himself.
  Matthew 27:3-5


On the other hand, Acts of the Apostles shows Judas as well pleased with himself, using the blood money to buy a farm, although by misadventure he was unable to enjoy the fruits of his betrayal. Since he displays complete unconcern that Jesus had been crucified, we could say that in this account, Judas was also unconcerned at the time of the betrayal whether this would be the outcome, whether or not he knew:


  Now this man purchased a field with the reward of iniquity; and falling headlong, he burst asunder in the midst, and all his bowels gushed out.
  Acts 1:18