Chicken with ketchup

3 lbs chicken pieces , with skin and bones (1.5kg) 4 tablespoons flour (60 ml) 1 large onion , peeled and roughly chopped oil (for frying) 14 ounces canned[...]

4 chicken breast halves (bone in) 1 onion , halved 1 carrot , quartered 3 stalks celery & leaves , chopped 2 (14 1/2 ounce) cans chicken broth 2 cups water 2[...]