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dissolve 26,7 g of lanthanum chloride heptahydrate (lacl3 7h2o) or 31,2 g of lanthanum nitrate hexahydrate [la(no3)3 6h2o] or 26,2 g of lanthanum sulphate nonahydrate [la2(so4)3 9h2o] in 150 ml of water, then add 85 ml of 6 mol/l hydrochloric acid (4.1).
i en 1 liter målekolbe opløses 26,7 g lanthanchlorid, heptahydrat (lacl3 7h2o) eller 31,2 g lanthannitrat, hexahydrat [la(no3)3 6h2o] eller 26,2 g lanthansulfat, nonahydrat [la2(so4)3 9h2o] i 150 ml vand, hvorefter der tilsættes 85 ml 6 mol/l saltsyre (4.1).