I have seen vague descriptions of demonstrations in which bottled
hydrogen and oxygen are used to blow free floating soap bubbles, which
can then be ignited.
Is there a simple set up which can be used to fill soap bubbles with
hydrogen and oxygen gas generated directly from electrolysis?
I found that sticking my electrodes in soapy salt water just generates
a lot of dense tiny bubbles, which don't ignite.
Running the gasses through a tube dipped in a bit of soap works OK,
but the bubbles tend not to be released from the tube, and they pop
before they become free floating. For safety reasons, I don't care to
ignite soap bubbles while they are still attached to a tube which is
attached to my electrolysis glassware (well, OK, I tried it once with
predictably unsafe results).
Bottom line: What does it take to get soap bubbles to release from a
tube before they pop?