Chance's best quality resistance laboratory glassware / Chance Brothers and Co. Limited.

  • Chance Brothers and Co.
Date:
[1927]
Catalogue details

Licence: Public Domain Mark

Credit: Chance's best quality resistance laboratory glassware / Chance Brothers and Co. Limited. Source: Wellcome Collection.

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    CONTINUATION. 2 Alkalinity (NaoO) expressed.2s os muper acm Beakers OOOO Flasks O- 00012 After the autoclave test the vessels were perfectly clear and quite untarnished. Soluble matter removed per sq. dcm. Beakers 0.0019 Flasks OZO0025 THE ACTION OF HYDROCHLORIC ACID. This test was only applied to the beakers, as the shapesmoer the flasks, and other conditions, make it impossible to obtain strictly comparative, tests. One hundred cubic centimetres of hydrochloric acid (sp.gr.1.15) were placed into each beaker and boiled cna without loss, for half an hour. The acid was now evaporated fo dryness and the whole process repeated twice. The beakers were cleaned out with water and the solution thus obtained evaporated to dryness, ignited and weighed. After making allowance for the residue originally present in the acid it was found that nonewoe the three beakers had given up any substance to the acid: THE ACTION OF CAUSTIC SODA. Three beakers and three flasks were cleansed and weighed, using similar vessels as counterpoises. 100 cc. of 2N caustic soda were placed into each vessel and boiled for four hourseim such a way that no evaporation occurred; on cleaning and again weighing the following losses were found to have taken place. The losses are the means of three and represent losses per square dcm. Date: 24th January, 1927. Beakers/
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