Preheat oven to 400°.
To prepare shrimp, lightly spoon the flour into a dry measuring cup; level with a knife. Place flour in a shallow dish. Combine the buttermilk and egg white in a medium bowl, stirring with a whisk. Place potato chips in a food processor; process until finely ground. Place chip crumbs in a shallow dish.
Sprinkle shrimp evenly with salt and pepper. Working with 1 shrimp at a time, dredge shrimp in flour; dip into buttermilk mixture. Dredge shrimp in crumbs, shaking off excess. Place shrimp on a baking sheet coated with cooking spray. Lightly spray top of shrimp with cooking spray. Repeat the procedure with remaining shrimp, flour, buttermilk mixture, and crumbs. Bake at 400° for 10 minutes or until done.
To prepare sauce, combine ketchup and remaining ingredients, stirring well. Serve sauce with shrimp.