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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The excess of alkali is titrated with N/1 hydrochloric or sulphuric acid. [Please select]
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, and titrated against standard ferrous ammonium sulphate solution, the formula for the calculation being:-- {0. [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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Add phenolphthalein to the filtrate and titrate with N/10 acid and calculate the per cent. [Please select]
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After cooling, the liquid is titrated with N/2 aqueous KOH solution, using phenol-phthalein as indicator, this figure giving the amount of the total fatty acids present. [Please select]
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The blank experiment is titrated in the same manner, and from the amount of thiosulphate required in the blank experiment is deducted the number of c. [Please select]
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