Determination of coating weights on electrolytic tinplate

✍ Scribed by Liebmann, H. ;Price, J. W. ;Thompson, S. H.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1949
• Weight: 389 KB
• Volume: 68
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000680606

✦ Synopsis

The following results were obtnincd with a solution of primary calcium phosphate of known concentration, prepared by adding 433.6 ml. of 0.04712-N. &(OH), to 200 ml. of o.1022-N. H,PO,. 50 ml. of thc mixture, containing 0 . 1 8 8 7 ~. of Ca(H,PO,), was used for each titration Weight of Ca(H,PO,), NaOH required by equation 3 calculated by equauon Percentage Volume in ml. of 0.101-N. NaOH Factor, I.c., ntio of Method used required (less blank) W r e q u i r e d q e q u a t i o n 4 4 (sce notc below) error Direcr rirrarion Effcct of diIufio,r of Ca(H,PO,), I. Aftcr evaporation to dryness and solution in 3. , Y 9, -I-;do A. 'dr water . . 21.18 0.754 0.1878 -0.48 21.45 0,744 0. 1901 + 0.74 4. 23 1) -!-150 ml. of water . . 5. NaOH added during 13 minutes 19.01 0.84 0.1685 -10.7 . . . . -21.9 50 ml. of Ca(H,PO,), run into 2 1 ml. of NaOH 7. 21.37 0.747 0.1894 4-0.37 8.