BASIC CHLORIDE SALTS OF ERBIUM AND YTTERBIUM

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Zhur. Neorg. Khim.

OSTI ID:4150292

Aksel'rud, N V; Spivakovskii, V B

The formation of basic salts is indicated by the fact that a rare earth salt can be completely precipitated by less than 3.0 equivalents of NaOH. To determine the composition and activity product of the insoluble basic salts, it was necessary to measure chloride activity with a silver chloride or calomel electrcde and hydroxide activity by determining the pH of the solution with a glass electrode. Since there were no literature data on activity coefficients of ErCl/sub 3/ and YbCl/sub 3/ in aqueous solution, the activity values were derived from graphs relating known activity values of other rare earths to the ionic radii of the rare earth elements. Freshly precipitated basic salts of erbium and ytterbium have a compcsition corresponding to the formula M(OH)/sub 2/Cl with an activity product that depends on the activity of chlorine ion in solution. After aging for 50 days, the precipitate corresponds to the formulas Er(OH)/sub 2.5/Cl/ sub 0.5/ (activity product = 1.3 x 10/sup -22/) and Yb(OH)/sub 2.5/Cl/sub 0.5/ (activity product = 7.9 x 10/sup -23/). The activity of chlorine ion had a smaller effect on the activity product of the aged precipitates. (TTT)

• Research Organization: Inst. of General and Inorganic Chemistry, Ukrainian SSR
• NSA Number: NSA-14-018953
• OSTI ID: 4150292
• Journal Information: Zhur. Neorg. Khim., Journal Name: Zhur. Neorg. Khim. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

CHEMICAL REACTIONS
CHEMISTRY
DIAGRAMS
ELECTRODES
ERBIUM CHLORIDES
GLASS
HYDROXIDES
MEASURED VALUES
MERCURY CHLORIDES
PRECIPITATION
PRODUCTION
QUALITATIVE ANALYSIS
QUANTITY RATIO
RARE EARTHS
SALTS
SILVER CHLORIDES
SODIUM HYDROXIDES
SOLUBILITY
SOLUTIONS
WATER
YTTERBIUM CHLORIDES