my husband is moving out in 2 days and we are separating. Do I have the right toi change the locks or ask for his keys?

If your husband is on the deed or lease to the house, he has right to access the property absent a court order.  Having said that, it does not hurt to ask him for the keys and may be he will agree to stay a way.  Even if he agrees to stay away, the only way to guarantee to keep him out is by filing for divorce or legal separation and ask the court to award you exclusive use and possession of residence.  I have seen incidents where someone initially agrees to stay out but changes his/her mind and tries to move back in.  Best wishes.