The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution. [Please select]
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The acid is added and the lye well stirred, after which another sample is taken and again titrated as before. [Please select]
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The mixture of fat and neutralized alcohol is then heated to boiling and titrated with tenth normal alkali solution, using phenolphthalein as an indicator. [Please select]
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When dark colored oils or fats are being titrated it is often difficult to obtain a good end point with phenolphthalein. [Please select]
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To overcome this the alkali is titrated in absolute alcohol, filtering off the insoluble carbonate. [Please select]
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The soluble portion is caustic hydrate and may be titrated as such. [Please select]
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The carbonate remaining on the filter paper is dissolved in water and titrated as carbonate. [Please select]
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