Help! Using double displacement to make potassium/sodium hydroxcide from lime and soda ash

1. 2025-02-21 at 5:48 AM UTC

   #1
   CutterLegendaryNinja Houston
   Hey chemistry majors! I heard you can make these compounds, Potassium/sodium hydroxcide with calcium hydroxcide.
   
   So how much potassium/sodium carbonate to calcium hydroxcide do i need to mix for it to converet to the hydroxcide?
   
   
   calcium hydroxcide isn't that soluble in water so should i boil the sodium carbonate and calcium hydroxcide for 30 minutes to mix them?
2. 2025-02-21 at 7:15 AM UTC

   #2
   

   igbo Tuskegee Airman [cringe your preliminary chenopodium]
   bro just buy lye from the store. you're gonna burn the fuck out of yourself doing this.
   The following users say it would be alright if the author of this post didn't die in a fire!

   • Fluttershy
3. 2025-02-21 at 7:53 AM UTC

   #3
   

   the man who put it in my hood Black Hole [miraculously counterclaim my golf]
   1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   

   Originally posted by CutterLegendaryNinja calcium hydroxcide isn't that soluble in water so should i boil the sodium carbonate and calcium hydroxcide for 30 minutes to mix them?

   
   no it will be fine
4. 2025-02-21 at 7:54 AM UTC

   #4
   

   Instigator Naturally Camouflaged [the staring tame crusher]
   I got a U(unmarkable) grade for high school(gcse) science
   
   But this was my first thought
   
   
   

   Originally posted by the man who put it in my hood 1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   
   
   no it will be fine

5. 2025-02-21 at 1:38 PM UTC

   #5
   CutterLegendaryNinja Houston

   Originally posted by the man who put it in my hood 1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   
   
   no it will be fine

   
   https://www.bing.com/search?q=molar+mass+of+calcium+hydroxide&FORM=YF73DF&PC=YF73
   
   

   Originally posted by the man who put it in my hood 1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   
   
   no it will be fine

   
   Okay, sounds like you know what your talking about. They do have differenet weights depending on the mole.
   
   https://www.bing.com/search?q=molar+mass+of+calcium+hydroxide&FORM=YF73DF&PC=YF73 molar mass of calcium hydroxide 74.093 g
   
   https://www.bing.com/search?q=number+of+grams+per+mol+of+sodium+carbonate&qs=GS&pq=number+of+grams+per+mol+of+sodium+&sk=GS7&sc=8-34&cvid=F74C7D48E7D24C169CB7DC935EF1B6D1&FORM=QBRE&sp=8&lq=0
   
   105.998 gram per mole
6. 2025-02-21 at 1:42 PM UTC

   #6
   CutterLegendaryNinja Houston

   Originally posted by igbo bro just buy lye from the store. you're gonna burn the fuck out of yourself doing this.

   
   I did but the FDA, or someone has forced even the best food grade lye to be labeled "poison".
   
   Belle Chemical had some great stuff, before the FDA forced them to label thier food-grade lye poisonous. But I left it over my mother's house and she cleaned out her garage and threw all that shit out.
   
   I'm not a conspiracy theorist or anything , but I just find that I can't make stuff for people and be like "dude I totallly didn't use stuff marked poison..."
   
   So i have no choice but to just make it myself. This is the old-school way.
7. 2025-02-21 at 2:14 PM UTC

   #7
   CutterLegendaryNinja Houston

   Originally posted by the man who put it in my hood 1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   
   
   no it will be fine

   
   No one ever mentioned that before...any idea why we have to use the molar mass. I was thinking to just use a tablespoon each, but something told me that they might have different amounts or something that would mess up the conversion.
8. 2025-02-21 at 2:27 PM UTC

   #8
   CutterLegendaryNinja Houston

   Originally posted by the man who put it in my hood 1:1 molar ratio
   
   Na₂CO₃ (aq) + Ca(OH)₂ (s) → 2NaOH (aq) + CaCO₃ (s)
   
   
   
   no it will be fine

   
   so its about 4.5 tablespoons of calcium hydroxcide to one a little over a tablespoon of sodium carbonate. I'll be using a little drug scale for this so it will be more excat.
   
   So can I just put these in a liter of wate and stir it really good, and the calcium hydroxcide should just drop out without boiling?
9. 2025-02-21 at 7:15 PM UTC

   #9
   

   Fluttershy Short Bussy

   Originally posted by igbo bro just buy lye from the store. you're gonna burn the fuck out of yourself doing this.

10. 2025-02-22 at 9:27 AM UTC

    #10
    

    the man who put it in my hood Black Hole [miraculously counterclaim my golf]
    I can't even find this reaction in any modern literature anywhere online except for molar balancing equations for high school level chemistry. I don't get it.
    https://www.studocu.com/en-ca/messages/question/2758142/calcium-hydroxide-reacts-with-aqueous-sodium-carbonate-to-produce-sodium-hydroxide-and-calcium
    https://en.wikipedia.org/wiki/Sodium_hydroxide#History
    
    

    Sodium hydroxide was first prepared by soap makers.[53]: p45  A procedure for making sodium hydroxide appeared as part of a recipe for making soap in an Arab book of the late 13th century: Al-mukhtara' fi funun min al-suna' (Inventions from the Various Industrial Arts), which was compiled by al-Muzaffar Yusuf ibn 'Umar ibn 'Ali ibn Rasul (d. 1295), a king of Yemen.[54][55] The recipe called for passing water repeatedly through a mixture of alkali (Arabic: al-qily, where qily is ash from saltwort plants, which are rich in sodium; hence alkali was impure sodium carbonate)[56] and quicklime (calcium oxide, CaO), whereby a solution of sodium hydroxide was obtained. European soap makers also followed this recipe. When in 1791 the French chemist and surgeon Nicolas Leblanc (1742–1806) patented a process for mass-producing sodium carbonate, natural "soda ash" (impure sodium carbonate that was obtained from the ashes of plants that are rich in sodium)[53]: p36  was replaced by this artificial version.[53]: p46  However, by the 20th century, the electrolysis of sodium chloride had become the primary method for producing sodium hydroxide

    
    this predates the Leblanc process from the 1700s which probably explains why it's so obscure
    
    https://en.wikipedia.org/wiki/Leblanc_process