Qualification > Sciences

Moles Again...

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Ghost Of Highbury:

--- Quote from: shreyapril on September 10, 2009, 03:17:54 pm ---i got some wierd ans wen i tried it the way a star told me
i got something near to 98.28% purity

--- End quote ---
how ddid u get

98%

~~~~shreyapril~~~~:
ohh
but i think u had written 46 not 92 if i am not wrong..

Ghost Of Highbury:

--- Quote from: eddie_adi619 on September 10, 2009, 03:31:44 pm ---
--- Quote from: eddie_adi619 on September 10, 2009, 03:29:28 pm ---
--- Quote from: shreyapril on September 10, 2009, 03:27:09 pm ---oye it shud be 84*2
the equation for the same is..
2NaHCO3 --> Na2CO3 + CO2 + H2O

--- End quote ---
oh..missed that..
u shud have ritten the whole equation

astar missed it too..

u just rote CO2

yes its 84*2

--- End quote ---
i'm getting 92%

--- End quote ---
chk this

~~~~shreyapril~~~~:
Mr of NAHCO3 is 168         Mr of CO2 is 44
Mass of NAHCO3 is 9.3        Mass of Na2CO3 is 5.9    mass of CO2 is 2.24        mass of H2O is 1
                5.9+1+2.24=9.14
        9.14/9.3*100=98.28[app]

astarmathsandphysics:
i THOUGHT THE EQUATION WOULD BE NaOH3=NaOH+CO2

Which make the ratio 1:1

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