ivory whale
Q- (100gm of CuSO4 . 5 H2O is dissolved in 500 g of water to form aq solution. find molarity & molality of Cu2+ if density of solution is 1.2 g/ml [Cu=64] [S=96])
isme sir ne bola water of crystallisation ka bhi mass lena hoga molality find krne ke liye or usme unhone water of crystallisation ke 2.5 mole liye , ye smajh nhi aaya
glacial mortar
using the mole of h20 in water of crystallisation and the moles in the the voulme of water throught tht cal the molality of it
steady mortar
Q- (100gm of CuSO4 . 5 H2O is dissolved in 500 g of water to form aq solution. f...
160 g/mol is the molar mass of copper sulphate, with 5 mol water it would be +90 g. does that help?
out of the 100 g, 100/250 * 90 is the mass of water ie 36 g
molality is just moles of Cu2+ / mass, i.e. 0.4/0.536
do you have the pic of the question?
ivory whale
do you have the pic of the question?
glacial mortar
ohh ok since here moles of cuso4. 5h20 is .5 thts why h20 is 2.5 moles
ivory whale
molality is just moles of Cu2+ / mass, i.e. 0.4/0.536
i was doing the same but then the teacher tok 0.5 mole for the calculation and did 0.5 x 5x18 for the total mass and i got confused as the no. of moles were 0.4 as we calculated it beforehand , it made me very confused that how it went from 0.4 to 0.5 out of nowhere , and cant seem to find the mistake if its on his part or lack of my understanding
ivory whale
ohh ok since here moles of cuso4. 5h20 is .5 thts why h20 is 2.5 moles
0.4 moles nhi hone chaiye? 100/250 = 0.4 hoga and 0.4 * 90 gives us mass of water
or am i wrong here?
glacial mortar
i think the soln here is wrong
wait a sec
since when is S molar mass 96
its 32
steady mortar
since when is S molar mass 96
yea woh sulphate ka likha hoga
ivory whale
and molality as 0.748
i got 0.746 as molality is that much acceptable ?
+solved @steady mortar @glacial mortar
slim steppe