formaldehyde - Sciencemadness Dot Org

50
:H:O/J00 £.
Solution
2.23
4.60
10.74
13.59
IS. 82
23.73
27.80
34.11
37.53
FORMALDEHYDE
by Natta and Baccaredda 21 confirms Aucrbach's density measurements,
but disagrees with the earlier refraction data oi Rcicher and Tanson 22 , a31(^
Stutterheim 25 . Density and refraction data for solutions ^ in taming up to
50 per cent formaldehyde as determined by Xatta and Bacraredda are
shown in Table 8,
The density of formaldehyde .solutions in the neighborhood of iS°C can
be calculated "with a fair degree of accuracy by the following formula:
D = 1 0 0 0 + 3
in which W is equivalent to the formaldehyde concentration in weight per
cent. The following formulas based on the above equation are useful for
ff. GHsO/100 cc.
Solution
2,24
4,66
11.03
14.15
19.89
25-44
30.17
37-72
41.S7
^ -
Table 7. Density of Aqueous Formakloiiydfl.*
Formaldehyde Concentration
Weight Per Cent Volume Per Cent
Data from Auerbach and Barschall 2 .
Uuiiiitv
ut 18 n C
1.0054
1.012G
1.0311
1.0410
1.05GS
1.0719
1.085*
1.1057
i.nns
Table S. Density and Refraction of Aqueous KormaMeliyde-*
Formaldehyde Concentration
fg./lOO g. solution)
0
0
10
15
20
25
30
35
40
45
50
Density at
is*C
0.99S6
1.0141
1.0299
1.0449
1.0600
1.0757
1.0910
1.1066
1.1220
1,1382
1.1570
* Data from Natta, and Baccaredda 21 .
1.S330
1.33SS
1.3445
1.3504
1.3559
1.3617
1.3670
1.3735
1.3705
1.3857
1.3925
converting volume per cent figures (F) to weight per cent (W) and vice
versa. Their accuracy is naturally limited to temperatures around 1S°Q
w - V^ + o.ow-i
0.006
V -= W + O.O03TF 5
The temperature coefficient ^—j in the ordinary temperature range