Ammonia can be a substitute for bleach.
Step 1: Gather Materials
-Two flasks made for chemistry purposes
-Bleach (or ammonia)
Put all your materials aside except for your sodium and one of the flasks. Remove one piece of sodium from it's bottle, dry off the oils with a towel or napkin (Make sure to touch the soidum as little as possible) and place it into the flask. Set this flask aside.
Using the second flask, open the vinegar and pour about 1/2 of a cup into the flask. Make sure to shut the vinegar, you won't need it anymore.
Now with the flask of vinegar, get your bleach (or plain ammonia) and balloon ready. As soon as you pour 1/2 cup of bleach into your flask, cover it with a balloon. Tihs way, you can gather the chlorine gas you just made.
Pinch off the end of the balloon with one hand, and remove it from the flask. Make sure to pinch the balloon tightly so none of the chlorine gas you just created escapes the balloon.
Take the first flask you used, containing a piece of sodium, and cover the flask's lid with the balloon. At this point, you should have a reaction that creates salt.
This hasn't worked for us yet, but these are the steps we have gone through to create chlorine gas. We have tried both bleach and ammonia.