Rachel Buckland is facing five charges of misconduct while employed at Berelands House Care Home in Prestwick, Ayr.
She is alleged to have said, "Me white, her n****r" or words to that effect with reference to and/or in the presence of Resident A.
The home, run by Amore Care, offers residential, nursing and dementia care for the elderly.
The nurse is also accused of a catalogue of care failures including talking breaks when she was required to check on residents and leaving a medication trolley unnattended on one or more occasions.
The incidents are said to have happened between June 2010 and June 2012.
A spokeswoman for the home said it would issue a statement after the case was concluded.