value of mole fraction is always between 0 and 1, so solute's mole fraction is usually less in dilute solution. If the mole fraction of solute is nearly equal to mole fraction of water, then it depends on the question what to find.
Ok but fine if we're considering solute mass as negligible but then in the formula were trying to find moles of ethanol which is also a very small amount right so how can we take num of moles of water in solution as 55.55 moles😭@@studyscimaths.
@@Midzyforeva what is happening is that the mole fraction of ethanol is very small, so it means the solution is dilute, which means that mass of solvent is approximately equal to mass of solvent, therefore we can assume them to be equal
Sir ke Uppar se nikal gya ma'am
Thank you so much mam ❤️😊😘
But hamne dono ke number of mole barabar kase man liye ?? Kuvh smj nhii aya
Thankyou so so much ma’am!!!
I have doubt how is that 0.96 comes
Xa+Xb=1
And Xa=0.040 are given
Xb=1-Xa = 0.96
4:28 mam how did you predict the volume is 1L. Please clear my doubt 😭
same doubt 😐
@@dollsisharma575 per ab ptaa lagga mujhe usne ye starting me hi assume kar liya tha 1 Litre
@@Jaiyesh_kukreti molarity 1L mei found karte hai toh ho sakta hai isliye 1L assume kiya ho
she assumed the volume to be 1l to make the calculations easy
I also got it🙃
Maam it is ok we will ignore the volume of solute but what if the mole fraction was large😢
value of mole fraction is always between 0 and 1, so solute's mole fraction is usually less in dilute solution.
If the mole fraction of solute is nearly equal to mole fraction of water, then it depends on the question what to find.
9:47 how u put 1 in value of nc2h5oh
It's cross multiplication of the equation.
Is chapter me muje bahut doubt hai so ye question muje thik se samaj nahi aaya😢
Ma'am assume kab kitna litre karna chachiye kasa pata chalaga.
Dear student, hum jadatar time 1L hi assume kar k chalte hai. Because in formula, hum hamesha ml ko L me convert krte hai.
@@BandhanaSharma thank you very much ma'am for your reply.
It's so confusing, I don't get it 😢
Correct answer is 0.002 molperlitre
Nice explanation
thanks somuch miss
I got a blank space baby, and i will write your name❤
👌👌👌👌👌
But how can we assume volume as 1L???
Because it is a very dilute solution therefore we have to ignore it
Remember
In a dilute solution 》》》》
Vol of solution ~ Vol of solvent
❤😊
@@I.am.the.ARC1722but we are given density as 1 not the volume?
Mam how the mass of solution is equal to mass of water
As H20 density is 1 and density formula is [d=m/v] d for density, m for mass and v for volume.👄.
@@studyscimaths. Ye dilute solution hai aur Dilute solution me solvent mass negligible le skte hai.
@@studyscimaths. Are you in 11th?
Ok but fine if we're considering solute mass as negligible but then in the formula were trying to find moles of ethanol which is also a very small amount right so how can we take num of moles of water in solution as 55.55 moles😭@@studyscimaths.
@@Midzyforeva what is happening is that the mole fraction of ethanol is very small, so it means the solution is dilute, which means that mass of solvent is approximately equal to mass of solvent, therefore we can assume them to be equal
Mam ap bahut achi padhati hai pr mujhe thoda priblem hota hai jb ap video ko lambi chaudi khichati hai to
Yes u r right 😢
👏👏👏👍👍👍
I think the original question has asked to find molality instead of molarity
Yes your are correct
No it's molarity
No
That's what I was wondering it should actually be molality q
Its molarity
Useless explanation and solution of the questions
Worst lecture beacuse there is not given that volume of solution is 1L