Specific gravity bottle tables

Specific gravity is the density (mass per volume) of the sample compared to the density of water (see Table Gl.5.7 in Anticipated Results). Samples are equilibrated to the same temperature and weighed using a pycnometer. The pycnometer is a sample bottle that provides a constant volume. 

When the hydrochloric acid has cooled to room temperature determine the volume and the specific gravity of the solution in both absorption bottles. Use either a hydrometer or the apparatus shown in Fig. 19. Consult the table on page 371 and determine the percentage composition of the preparation. Calculate the weight of hydrogen chloride obtained, the normality of the solution, and the percentage yield. 

The specific gravity of milk can be used to determine the total solids (TS) content and is usually measured by either a standard hydrometer or with a pycnometer (density bottle) after gentle mixing. The effect of different temperatures can be corrected using a table. The TS of the milk can be calculated if the fat content is known by using Richmond s formula ... 

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