NEED HELP. Chemistry question about hydrochloric acid mixed with sodium sulfide. Hydrogen sulfide/detergent method help.

[heyismeman]

Right now I plan on doing this. 2 plastic buckets each with 1000ml of hydrochloric acid at 30%. Then the 2 buckets will be in a small car. I will mix 1000grams of sodium sulfide flakes into each bucket and quickly stir them. Can a chemist here tell me the ppm of hydrogen sulfide this would produce? According to chat gpt it would turn the car into 75300ppm. Obviously this isn't good as it would be SERIOUSLY overkill and injur anyone nearby. Can someone with good chemistry knowledge give me an accurate estimate

 

[RadiantNumber]

I am not chemist but I don't think it would be safe, you could burn yourself with acid
I heard there are easier methods without acid but I am not chemist as I said

 

[heyismeman]

I am not chemist but I don't think it would be safe, you could burn yourself with acid
I heard there are easier methods without acid but I am not chemist as I said

Yea I don't think I would burn myself with acid. I'm not claiming to be "that guy" or anything, but I bet I could mix a liquid without it touching my skin lol

 

[RadiantNumber]

Yea I don't think I would burn myself with acid. I'm not claiming to be "that guy" or anything, but I bet I could mix a liquid without it touching my skin lol

Idk just be safe :)

 

[kamyzyak]

I am not a chemist, but I have studied chemistry in the past.

We have 2 liters of aqueous HCl solution and 2000 g of Na2S. We also have a car with an unknown volume of air. Google estimates that, on average, a compact car will have about 3000 liters of air.

The mass of a 30% HCl solution will be equal to the volume multiplied by the density = 2 L × 1150 g/L = 2300 g. The mass of HCl in this solution will be equal to 2300 g × 0.3 = 690 g. The molar mass of HCl = 36.5 g/mol, so we have 690 g ÷ 36.5 g/mol = 18.9 mol HCl.

The molar mass of Na2S is 78 g/mol, so we have 2000 g ÷ 78 g/mol = 25.6 mol Na2S.

Reaction formula:
2HCl + Na2S --> H2S + 2NaCl
There is a shortage of HCl, so we will calculate based on that.
2HCl (18.9 mol) + Na2S (9.45 mol) --> H2S (9.45 mol) + 2NaCl (18.9 mol)

During the reaction, 9.45 mol of H2S will be released. At room temperature and a pressure of 1 bar, this will give us 9.45 mol × 24.8 L/mol = 234.36 L of H2S. The volume fraction of H2S will be equal to 234.36 L ÷ (234.36 L + 3000 L) = 0.072459 = 7.2459% = 72459 ppm.

It's also worth noting that this is an exothermic reaction with a significant gas release. If you simply add sodium sulfide to the acid, you risk creating a volcano of hot acid solution. As far as I know, the acid is added to the reactants, not vice versa.

 

[heyismeman]

I am not a chemist, but I have studied chemistry in the past.

We have 2 liters of aqueous HCl solution and 2000 g of Na2S. We also have a car with an unknown volume of air. Google estimates that, on average, a compact car will have about 3000 liters of air.

The mass of a 30% HCl solution will be equal to the volume multiplied by the density = 2 L × 1150 g/L = 2300 g. The mass of HCl in this solution will be equal to 2300 g × 0.3 = 690 g. The molar mass of HCl = 36.5 g/mol, so we have 690 g ÷ 36.5 g/mol = 18.9 mol HCl.

The molar mass of Na2S is 78 g/mol, so we have 2000 g ÷ 78 g/mol = 25.6 mol Na2S.

Reaction formula:
2HCl + Na2S --> H2S + 2NaCl
There is a shortage of HCl, so we will calculate based on that.
2HCl (18.9 mol) + Na2S (9.45 mol) --> H2S (9.45 mol) + 2NaCl (18.9 mol)

During the reaction, 9.45 mol of H2S will be released. At room temperature and a pressure of 1 bar, this will give us 9.45 mol × 24.8 L/mol = 234.36 L of H2S. The volume fraction of H2S will be equal to 234.36 L ÷ (234.36 L + 3000 L) = 0.072459 = 7.2459% = 72459 ppm.

It's also worth noting that this is an exothermic reaction with a significant gas release. If you simply add sodium sulfide to the acid, you risk creating a volcano of hot acid solution. As far as I know, the acid is added to the reactants, not vice versa.

Wow really so much? 72k ppm would mean I make enough that anyone near by would be injured so I absolutely can't do that that's crazy

I am not a chemist, but I have studied chemistry in the past.

We have 2 liters of aqueous HCl solution and 2000 g of Na2S. We also have a car with an unknown volume of air. Google estimates that, on average, a compact car will have about 3000 liters of air.

The mass of a 30% HCl solution will be equal to the volume multiplied by the density = 2 L × 1150 g/L = 2300 g. The mass of HCl in this solution will be equal to 2300 g × 0.3 = 690 g. The molar mass of HCl = 36.5 g/mol, so we have 690 g ÷ 36.5 g/mol = 18.9 mol HCl.

The molar mass of Na2S is 78 g/mol, so we have 2000 g ÷ 78 g/mol = 25.6 mol Na2S.

Reaction formula:
2HCl + Na2S --> H2S + 2NaCl
There is a shortage of HCl, so we will calculate based on that.
2HCl (18.9 mol) + Na2S (9.45 mol) --> H2S (9.45 mol) + 2NaCl (18.9 mol)

During the reaction, 9.45 mol of H2S will be released. At room temperature and a pressure of 1 bar, this will give us 9.45 mol × 24.8 L/mol = 234.36 L of H2S. The volume fraction of H2S will be equal to 234.36 L ÷ (234.36 L + 3000 L) = 0.072459 = 7.2459% = 72459 ppm.

It's also worth noting that this is an exothermic reaction with a significant gas release. If you simply add sodium sulfide to the acid, you risk creating a volcano of hot acid solution. As far as I know, the acid is added to the reactants, not vice versa.

If 2000ppm means certain death I'm right to think that's a ridiculously high number correct? If I can go in the woods with a tent I'm ok with it but in a car that amount would put others in danger no?

 

[pthnrdnojvsc]

Right now I plan on doing this. 2 plastic buckets each with 1000ml of hydrochloric acid at 30%. Then the 2 buckets will be in a small car. I will mix 1000grams of sodium sulfide flakes into each bucket and quickly stir them. Can a chemist here tell me the ppm of hydrogen sulfide this would produce? According to chat gpt it would turn the car into 75300ppm. Obviously this isn't good as it would be SERIOUSLY overkill and injur anyone nearby. Can someone with good chemistry knowledge give me an accurate estimate

I've got the hcl 32% acid . i wore gloves while handling it . careful with breathing in fumes.

but i was thinking of using lime sulfer . i never heard of sodium sulfide flakes . which one did you buy?

i think one needs to test with a meter to see how much is really being produced . but test with a very small amount cause h2s is dangerous . that test they did with .1 Ml of each in a 500 Ml container.

 

[heyismeman]

I've got the hcl 32% acid . i wore gloves while handling it . careful with breathing in fumes.

but i was thinking of using lime sulfer . i never heard of sodium sulfide flakes . which one did you buy?

i think one needs to test with a meter to see how much is really being produced . but test with a very small amount cause h2s is dangerous . that test they did with .1 Ml of each in a 500 Ml container.

Sodium sulfide you can buy online there's alot of distributors. First dissolve it into water though. Lime sulfur doesn't seem to be a real product man, like it's a mixture of chemicals and every batch is completely different. Sodium sulfide is a real solid chemical and the reaction should work as intended and be pretty exact. I will test it first tho but just a wiff test, mix in 2 drops of each and smell. According to chat gpt and also the gentleman that ran the calculations (same answer) it should produce a hilarious amount

 

[pthnrdnojvsc]

Sodium sulfide you can buy online there's alot of distributors. First dissolve it into water though. Lime sulfur doesn't seem to be a real product man, like it's a mixture of chemicals and every batch is completely different. Sodium sulfide is a real solid chemical and the reaction should work as intended and be pretty exact. I will test it first tho but just a wiff test, mix in 2 drops of each and smell. According to chat gpt and also the gentleman that ran the calculations (same answer) it should produce a hilarious amount

i found 2 sources of lime sulfer so those are not really 28% lime sulfer as they state?

 

[heyismeman]

i found 2 sources of lime sulfer so those are not really 28% lime sulfer as they state?

Lime sulfur isn't a real chemical, it's like a soup. It's a "mixture of calcium polysulfides and thiosulfate formed by reacting calcium hydroxide with elemental sulfur" it probably works as intended but I would rather mix 2 exact chemicals. 2HCl + Na2S = H2S + 2NaCl(table salt) as opposed to kinda gambling with lime sulfur

 

[kamyzyak]

Wow really so much? 72k ppm would mean I make enough that anyone near by would be injured so I absolutely can't do that that's crazy

If 2000ppm means certain death I'm right to think that's a ridiculously high number correct? If I can go in the woods with a tent I'm ok with it but in a car that amount would put others in danger no?

The H2S method is notorious for putting others at danger. Even at concentrations that do not kill within minutes, inhaling highly toxic chemicals isn't good. I don't know what recommendations PPH gives for this method, but I think that in order to prevent collateral harm, it would be reasonable to do this somewhere where no one can accidentally enter, and clearly mark the area as a chemical hazard. Cars are not airtight, so it could be dangerous for others if they stumble upon it.

 

[heyismeman]

The H2S method is notorious for putting others at danger. Even at concentrations that do not kill within minutes, inhaling highly toxic chemicals isn't good. I don't know what recommendations PPH gives for this method, but I think that in order to prevent collateral harm, it would be reasonable to do this somewhere where no one can accidentally enter, and clearly mark the area as a chemical hazard. Cars are not airtight, so it could be dangerous for others if they stumble upon it.

Yea I think I will instead go into the woods as deep as I can and set up an airtight tent. Or I will park the car somewhere truly remote and marking off the area will be done regardless of area I choose