126. Solving a chemistry problem

97. Using preliminary calculations, set the volume interval of 0.05 mol / l of Trilon B solution, which will ensure the quality of a 10% calcium gluconate solution for injections in terms of quantitative content according to the method of FS 42-3138-95: 2 ml of the drug is diluted with 8 ml of water, add 10 ml of ammonia buffer solution and titrate with a 0.05 mol/l solution of Trilon B (K = 1.0000) until blue coloration (acid chromium indicator is dark blue). Mm. calcium gluconate 448.4 The content of calcium gluconate in 1 ml according to SP X should be 0.097-0.102 g.