Evaporation se namak paani se kaise alag karein?

Namak kahan chala jaata hai?

Aadhe katore paani mein do-teen chammach namak ghol do, aur namak gayab sa ho jaata hai. Wo ghul gaya hai aur namak ka ghol (salt solution) ban gaya hai. Namak abhi bhi wahin hai: paani namkeen lagta hai. Kyunki namak ghul gaya hai, sieving, decantation aur filtration use alag nahi kar sakte; uske kan paani ke saath kisi bhi filter se nikal jaate hain. Ye tareeke sirf un solids ke liye hain jo nahi ghulte, jaisa sedimentation, decantation aur filtration mein samjhaya hai.

Namak se art: evaporation dekho

Namak ke ghol ki kuch boondein kaale ya gehre rang ke mote kaagaz pe failaao, ya isse koi chitra banao, aur sookhne do. Jahan boondein thi, wahan safed daag dikhenge. Chhoo ke dekho, namak mehsoos hoga. Paani vapour ban ke hawa mein chala gaya, par namak uske saath nahi ja saka.

Garmi ke dinon mein gehre rang ke kapdon pe bhi yahi hota hai: paseena sookhta hai aur namak ke safed daag chhod jaata hai.

Garam karke namak wapas paana

Tumhare teacher ye dikha sakte hain. Namak ke ghol ko ek china dish mein daalo aur spirit lamp ke upar wire gauze pe tab tak garam karo jab tak paani ud na jaaye. Dish ko thanda hone do. Dish mein namak bachta hai; ungliyon se chhoo ke mehsoos kar sakte ho. (Dish ko dhyaan se, aur sirf kisi bade ke saath, garam karo.)

Ye tareeka evaporation hai: wo process jisme liquid apne vapour mein badalta hai. Isse liquid mein ghula solid alag kiya jaata hai.

Samudra se namak

Jab Malli poochhta hai ki namak kahan se aata hai, Ghanshyam bhai kehte hain: samudra ke paani se. Samudra ka paani namak aur kuch doosre padarthon ka paani mein ghol hai. Namak paane ke liye samudra ka paani uthle gaddhon mein rakh ke dhoop aur hawa mein chhoda jaata hai. Kuch dinon mein paani poora ud jaata hai aur ek solid mixture bachta hai, jise aur saaf karke aam namak milta hai. Kuch jheelon, jaise Rajasthan ki Sambhar jheel, mein bhi aam namak hota hai.

Namak ka India ke itihaas mein bhi khaas sthaan hai. Ahmedabad ke Sabarmati Ashram mein Malli aur Valli Namak Satyagraha, yaani Dandi March, ke baare mein seekhte hain.

Kya namak aur paani dono wapas mil sakte hain?

Evaporation paani ko hawa mein bhej deta hai. Paani bhi chahiye to vapour ko thanda karna padta hai taaki wo wapas liquid ban jaaye, jo condensation hai. Agar garam namak wale paani ki vapour ko kisi thande bartan mein le jaayein, to wahan paani ki boondein jama hoti hain, aur wo namkeen nahi hoti. Namak dish mein hi bacha rehta hai.

Roz ki zindagi mein evaporation

Ayurveda, India ki paramparik swasthya aur chikitsa paddhati, mein jadi-bootiyon ki jadein, patte, phool ya beej aksar chhaon mein sukhaaye jaate hain. Zyada paani ud jaata hai aur dawa ka kaam ka hissa bach jaata hai.

Mixture	Tareeka	Kyun
Paani mein ghula namak	Evaporation	Paani vapour banta hai, namak nahi
Paani mein ret	Sedimentation, decantation ya filtration	Ret nahi ghulti
Namak aur paani, dono chahiye	Evaporation, phir condensation	Vapour thanda hoke paani banta hai