Calculate NaCl Density at 20C in lbs/ft3 | SG & PV=nRT Methods

[zeshkani1985]

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

 

[Borek]

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]

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! :)