NaCl Density in lbm/ft3


by zeshkani1985
Tags: density, lbm or ft3, nacl
zeshkani1985
zeshkani1985 is offline
#1
Jan17-13, 01:17 AM
P: 15
Calculate the density of NaCl at 20C in lbm/ft3 ?

since no volume was given i was wondering if this can be done this way
by using the Specific gravity which around 2.1x the referance density of solids/liquids which is 62 lbm/ft3 SG=p x pref


or can this be done using the PV=nRT, i assume at 1 mole so V=RT since D=m/v
D=m/(RT)
D=58(g/mol)/(8.3x293K)=0.024


i was also thinking of calculating the density using the FCC cube and go from there, I just think i' am making this problem seem harder than it is

Any feed back is appreciated

thx
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Borek
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#2
Jan17-13, 02:47 AM
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PV=NRT is for ideal gases, not for soilds.

If you are given specific gravity all you have to do is to convert from one units to another.
CompuChip
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#3
Jan17-13, 02:53 AM
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Quote Quote by zeshkani1985 View Post
Calculate the density of NaCl at 20C in lbm/ft3 ?

since no volume was given i was wondering if this can be done this way
I just wanted to point out that you are given a volume... it says "in lbm/ft3". So you can assume a volume of 1 ft³.

Borek is the chemistry expert here though, so follow his approach! :)


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