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sclarenonz
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[*] posted on 28-11-2017 at 07:36
strange


Boa tarde
agradeço pelo aprendizado que eu tenho com voces, eu tenho uma duvida:

eu joguei acido cloridrico no calcário e depois teve uma reação exotermica intensa que acredito que seja a liberação de dioxido de carbono, depois eu peguei esse liquida da reação e joguei ne uma solução de hidroxido de sodio gerando uma espuma muito densa
,que espuma é essa?
calcário + hcl = ??

after ??? + naoh = ??? uma espuma foi gerada.

fiz um video para um entendimento melhor




https://www.youtube.com/watch?v=geS9OvT4-qU&t=39s
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NEMO-Chemistry
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[*] posted on 28-11-2017 at 09:37



strange


Good afternoon
thank you for learning that I have with you, I have a doubt:

I threw hydrochloric acid into the limestone and then had an intense exothermic reaction that I believe is the release of carbon dioxide, then I got that liquid from the reaction and threw it into a sodium hydroxide solution generating a very dense foam
What is this foam?
limestone + hcl = ??

after ??? + naoh = ??? a foam was generated.

I made a video for a better understanding


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você poderia usar o google tradutor por favor
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Melgar
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[*] posted on 28-11-2017 at 09:48


Calcium hydroxide.



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aga
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[*] posted on 28-11-2017 at 12:00


Quote: Originally posted by NEMO-Chemistry  
você poderia usar o google tradutor por favor

Looks like they did - it isn't good Portugese and the word sequence suggests it was typed in English to begin with.




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woelen
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[*] posted on 28-11-2017 at 23:35


Quote: Originally posted by sclarenonz  
Boa tarde
agradeço pelo aprendizado que eu tenho com voces, eu tenho uma duvida:

eu joguei acido cloridrico no calcário e depois teve uma reação exotermica intensa que acredito que seja a liberação de dioxido de carbono, depois eu peguei esse liquida da reação e joguei ne uma solução de hidroxido de sodio gerando uma espuma muito densa
,que espuma é essa?
calcário + hcl = ??

after ??? + naoh = ??? uma espuma foi gerada.

fiz um video para um entendimento melhor




https://www.youtube.com/watch?v=geS9OvT4-qU&t=39s

The language for this forum is english. Please use that language. Of course, if there are some specific words in another language, then one can post them, with translation. Posting texts in other languages, asking for translation, also is OK, but we should not post just as is in other languages than english.




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sclarenonz
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[*] posted on 29-11-2017 at 07:15


sorry
I wanted it to come on the same frequency, thanks melgar, sodium hydroxide so the reaction is like this

caco3 + hcl = co2 + cacl

cacl + naoh = caoh + cl

now I'm confused, I thought sodium by being more reactive would never give way to calcium ??

[Edited on 29-11-2017 by sclarenonz]
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MrHomeScientist
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[*] posted on 29-11-2017 at 07:46


The reaction is driven by calcium hydroxide's low solubility. Similar to how in the first reaction carbon dioxide escaping helps drive that one forward.

In the future, please try to use proper notation in your formulas: capitalization, subscripts, and balanced equations. It helps a lot with readability.

CaCO3 + 2HCl --> CO2 + CaCl2 + H2O
CaCl2 + 2NaOH --> Ca(OH)2 + 2NaCl
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