Crock pot chops or ribs

6 or 8 chops or ribs to fill crock pot 1/4 cup onion, chopped 1/2 cup celery, chopped 1 cup catsup 1/2 cup water 1/4 cup lemon juice 2 Tbsp. brown sugar 3 Tbsp. Worcesteshire sauce 2 Tbsp. vinegar 1 tbsp. mustard 1/2 tsp. salt 1/4 tsp. pepper