To judge the end-point more precisely, change the colour of the mixture back from brown to green-blue with the potassium permanganate solution (paragraph 3.3).

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5 b). Viraje a la derecha (desde el punto de vista del piloto)

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5(b) Turn right (from pilot’s point of view)

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5 a). Viraje a la izquierda (desde el punto de vista del piloto)

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5(a) Turn left (from pilot’s point of view)

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2. La valoración podrá controlarse igualmente con el indicador (4.26), pero entonces el punto de viraje será más difícil de observar.

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2. The titration may also be assessed using the indicator (4.26), although the change of colour is more difficult to observe.

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(2) El control de la valoración podrá efectuarse igualmente por medio del indicador (4.29.2), pero entonces el punto de viraje resultará más difícil de observar.

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(2) The titration test may also be carried out with the indicator (4.29.2), but the end point is then more difficult to observe.

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Añadir 3,0 ml suplementarios de yodo 0,1 N, dejar reposar 10 minutos y valorar el exceso de yodo con hiposulfito sódico 0,1 N; añadir 3 ml de almidón SE (sustancia de ensayo) hasta acercarse al punto de viraje. Realizar una determinación en blanco.

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Add an additional 3.0 ml of 0.1 N iodine, allow to stand for 10 minutes and titrate the excess iodine with 0.1 N sodium thiosulphate, adding 3 ml of starch TS as the end point is approached.

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Add an additional 3.0 ml of 0.1 N iodine, allow to stand for 10 minutes and titrate the excess iodine with 0.1 N sodium thiosulphate, adding 3 ml of starch TS as the end point is approached.

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Añadir unas gotas del indicador de violeta cristal ( 4.2 ) y titular con ayuda de una solución de ácido perclórico estándar de concentración 0,1 mol/l ( 4.5 ) hasta el punto de viraje del indicador marcado por la aparición de una coloración verde pálida .

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Add a few drops of crystal violet indicator solution (4.2) and titrate to a pale green end-point, using standard 0 71 mol/l perchloric acid (4.5).

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'Viraje al punto' ->

Date index: 2023-01-28