if my mom goes in a nursing home.can they take the house she gave me more than five years earlier

Gong into a nursing home is not the triggering event. Applying for Medicaid is. THere is a 5 year look back from the date of eligibility after applying. If the transaction was more than 5 years ago, you are probably ok. However, check with a local elder law attorney. You should really get an opinion from a local Ohio attorney.