The ubderstandable notes - Chemical reaction and equations, Class 10, Part 2

 BALANCED CHEMICAL EQUATION 

In order to validate the law of conservation of mass, chemical equations are balanced. Balancing a chemical equation means that the number of atoms of each element should be the same on both sides (reactants as well as products). This can be done by several methods, but the simplest is the hit-and-trial method.

(Ab dekho ki balancing krni kyu padti hai to IX class mai humne padha tha agar nahi padha to ab padh lo ek law tha law of conservation of maas, jiske andar ye kehte the ki total maas before the reaction and after the reaction will be same ab dekhte hai ek simple se reaction par 

Ab agar hum is reaction ko dekhe to reactants side par oxygen aur hydrogen ke 2 atoms hai aur product side par oxygen ka sirf ek atom hai. Matlab ki maas of reactant is 34u aur maas of product is 18u to ab yaha law of conservation of energy kaha gaya, isliye hume balancing krni padti hai ab balancing mai basically ye hoga ki har element ka single atom bhi both side equal hoga ab ye krna kaise hai ye hum aage seekhnege but iski thodi si practice bhi expert bana sakti hai. Eqst topic hai aur haan ye maas nikalna to aata hoga na nahi aata to class 9 ke notes padh lo aa jayega.)

Let us balance this equation step by step 

Step 1-: make a box around molecules 

(Vaise to mai ncert ke hissab se oadha raha hu aur extra bhi but ye step mujhe important nahi lagta kyunki ye bix sirf isliye banaye jaate hai taaki molecules mai differencepehxhana jaa sake ab dekho na jaise H2 ek molecule hai kyunki hydrogen single atom form mai exist nahi krta but but agar mujhe hydrogen ka number reactant side par badhana hai ti mai H3 nahi likh sakta kyunki ye ye alag molecule ban jayega. Ise aise samjho ki hum jab bhi number of atom badhenge ya ghatenge to poore molecule ke atom us se multiply honge yu nahi ki sulphate mai sulpur ke atom badha diya aur oxygen to as it is chid diya kyunki law if cinstant proportiona yaad hoga hi, ti ab iske hissab se agar mujhe hydrogen ka number badhane hai to vo 2 se direct 4 honge kyunki mai 2 left side par lagaunga na ki right side par. Bas itna samajh lo ki molecule mai single atom badhaige to molecule hi alag ho jayega usliye jab bhi bakancing krni hoti hai tab hum number ko left side par lagte hai jiska matlab ki sare molecule ke atom use multiple ho gaye.)

Step 2-: now make a table and write the number of elements on the reactant and product side and then use hit and trial methid to balance the equation.

(Ab table banau aur usme dekho ki reactant aur product side par har element ke kitne atoms hai jaise ki hydrogen hume balanced dikhai de rahi hai but oxygen nahu kyunki reactant side par oxygen 2 hai aur product side par sirf ek. Ab yaar isme aage steps hi steps hai to mai aage tumhe samjha deta hu ki dekho mujhe equation balance krni hai notebook lekr baitho aur equation likho, mujhe oxygen to balance krna hai aur mujhe product side par 2 oxygen chahiye to mai kya kr sakta hu mai product side par oxygen wale molecule to 2 se multiple kr dunga kuch aise 

Par abhi bhi ye balanced nahi hai kyunki oxygen to 2 ho gayi but hydrogen 4 ho chuki hai to ab hume product side par hydrogen ki bhi multiple krna padega with 2

Ab ye equation bilkul balanced hai 👌.  Kisi ko sirf english mai samajhni ho to ncert padh lena mera kaam samjhane ka hai. Ab dekho kitni balanced lag rahi hai equation 4 atoms hydrogen ke both side aur 2 atom oxygen ke both side ab ek aur equation balance krte hai.

BALANCE THE EQUATION?

Let us go step by step

(Sabse pehle to humne box bana liya ab taboe ki baari hai.) 

( Ab ek ek atom ko balance krna start krte hai sabss pehle hum try krenge unhe balance krne ka jo molecule ya jahu complex form mai ho kyunki single atom ko to kitna bhi multiplt kr sakte hai na to start krte hai oxygen se to oxygen ko 4 se multiply krna padega reactant side.)

Abhi ye equation partially balanced hai completely balanced nahi hai to ab hume aur kuch bhi krna padega chalo ab is condition ki bhi ek table banate hai kyunki ye equation thodi lambi hai

Ab yaha par oxygen balance ho gayi hai but hydrogen aur iron rehta hai but hum easily isko balance kr sakte hai kyunki dono hi atom ya double atom molecule ki form mai hai. To ab bas iron ko 3 se multiply krdo aur hydrogen khunki prodct side mai molecule ki form mai exist kr rahi hai to usko 4 se multiply krdo aur ye rahi hmari balanced equation

Ab ye hai hmari balanced equation, ab inki practice kro aur koi doubt ho to chat gpt se puch lena koi paid course lene ki jarurat nahi hai.Abhi notes hi chal rahe hai but agar chapters complete ho haye to question answer par bhi focus kiya jaaega but abhi koi mood nahi hai mera.