HELLO EVERY ONE OVER THERE
I HAVE SOLVED THIS QUESTION MY ANSWER IS 0.01 MOLAL BUT ACCORDING TO ANSWER KAY IT IS 0.1 MOLAL , PLZ HELP ME ......
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HEY MATE HERES YOUR ANSWER IN THE PICTURE HOPE IT HELPS
WRITTEN BY PENCIL PLEASE DON'T MIND ^_^
WRITTEN BY PENCIL PLEASE DON'T MIND ^_^
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Hi
Nice question
Solution :-
Ethanol (C2H5OH)
Given mass = 2.3g
Molar mass = 12*2 + 5*1 + 16 + 1 = 46g
no. of moles of ethanol = given mass/molar mass = 2.3/46 = 0.05 moles
Given mass of water (in grams) = 500g
Molality = (0.05 × 1000)/500 = 0.1
Hope this helps.
Nice question
Solution :-
Ethanol (C2H5OH)
Given mass = 2.3g
Molar mass = 12*2 + 5*1 + 16 + 1 = 46g
no. of moles of ethanol = given mass/molar mass = 2.3/46 = 0.05 moles
Given mass of water (in grams) = 500g
Molality = (0.05 × 1000)/500 = 0.1
Hope this helps.
Anonymous:
Your calculation is wrong as 1000/500 = 2 & 2 × 0.05 = 0.1
I correct it ^_^
as 1 kg = 1000grams
This is the formula which can be applied when the mass of the solvent is given in grams
and molality = no. of moles of solute in 1 kg of solution
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