The Final Formula by Becca Andre

To a master alchemist like Addie, impossible is just another word for challenge. When a fiery explosion destroys the Alchemica, the premier alchemy institute in the United States, she's left with nothing. No home, no colleagues, and no memory. Learning what happened seems impossible, but she still has one strength, and in her opinion, it's the only one she needs. She hasn't forgotten a thing about alchemy.
Addie brews a potion to restore her lost past, but remembers only the flames of the Alchemica's destruction - and a man among the ashes. A man with the elemental power of fire, who just happens to be the leader of the magical community. He might know what happened, but getting him to tell her will require some...creativity. The magical aren't fond of alchemists. Some say it borders on hatred, but Addie isn't one to back down from a challenge, even if that challenge happens to be a man who can turn her to ash with a thought.

This book is part of the "The Final Formula" series.
Here are some other books from this series: