Method Hydrogen sulfide with gas mask

[peace_van]

This gear looks good as a H2S generator.

Step 1. Put 5g sodium sulfide nonahydrate (Na2S.9H2O) into the bottle.
Step 2 (Optional). Wrap the end of the thin black tube with tissues dipped with sodium carbonate solution (to absorb the H2S that leaks out)
Step 2. Mix 5g oxalic acid dihydrate (H2C2O4.2H2O) with 50ml water.
(Maybe don't dissolve it at this time? o.w. the reaction would be too fast and H2S leaks before tube is connected)
Step 3. Wear the mask.
Step 4. Hold my breath, pour the oxalic acid water into the bottle, connect the tube asap
Step 5. Shake the bottle to encourage dissolution, breathe in.

I can get the chemicals of analytical reagent grade, so I can calculate the amount.
5g of each sulfide and acid mixed will generate ~0.5L H2S when completely reacted.
This will be far more than enough for this gear (the bottle is only 1L volume),
while limiting the danger to rescuers (only 71 ppm in 7 cubic meters).

Oxalic acid is better than hydrochloric acid here because it will not evaporate and the reaction is milder.
HCl gas can be irritating.
(Has to be hydrochloric acid with iron sulfide, oxalic acid does not effectively react with iron sulfide)

Any suggestions for this method?

 

[Glandular]

Compared to inert gas it sounds worse. Since it is poisonous - are you sure that you won't suffer during the attempt?

 

[UKscotty]

Seems like a great way to make one of the fastest and peaceful methods less dangerous to others.

I'm definitely interested to see how you develop this concept.

H2S was one of the most popular methods until people started killing so many bystanders.

 

[Dying Knight]

H2S smells so terribly, so I would rather suffer from a pain ))

 

[peace_van]

Compared to inert gas it sounds worse. Since it is poisonous - are you sure that you won't suffer during the attempt?

I hope the reaction speed is fast enough so that the concentration reaches 1000 ppm in seconds (but it shouldn't be too fast to impair me before I securely connect the tube, which is hard to guarantee. This setup is based on my experience in chemistry lab

H2S smells so terribly, so I would rather suffer from a pain ))

As long as the concentration quickly goes beyond 150 ppm you won't smell it

Compared to inert gas it sounds worse. Since it is poisonous - are you sure that you won't suffer during the attempt?

And that's why I said "hold my breath" when doing it