Baljit Ubhey, Chief Crown Prosecutor in London, described the attack as "extremely brutal", adding:
"The use of acid as a weapon is cruel and horrifying. It can have a devastating effect on victims and can cause long-term pain and disfigurement as well as emotional and psychological harm."
Baljit Ubhey added: "Mary Konye and the victim used to be friends and they had discussed the high-profile case of Katie Piper, who was the victim of an acid attack in 2008, and how Naomi had been particularly moved and upset by her story.
"Konye exploited this fear to cause maximum harm and her defence of suggesting that the victim would have thrown acid on herself was contemptible.
"Konye has now been brought to justice and must face the full consequences of her appalling actions."
More top news
The mother of a former altar boy who tried to blow up a train insisted he was 'a big softie' who didn't want to hurt anyone.
Its current five year licence comes to an end next Tuesday.
Extra armed police will guard major sporting events in London this weekend after the military was drafted in to protect key locations.