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Potassium dichromate is orange and when it reacts with ethanol which is a primary alcohol it is going to oxidise it to form aldehyde which is colorless. so the color change is from Orange to Colorless. :)

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13y ago

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Name the following binary compound K2Cr2O7?

The chemical name is, potassium dichromate. It is orange in colour. Dichromate ion gives colour for this compound.


what is the colour change observed when Potassium manganate reacts with ethanol?

Purple colour


What is the final colour if potassium dichromate 7 and alcohol?

green


Why colour of ethanol changes when mix with potassium permanganate?

When ethanol is mixed with potassium permanganate, the purple color of the potassium permanganate fades. This is because ethanol reduces the potassium permanganate to form manganese dioxide, which is a brown precipitate. As a result, the overall color of the solution changes from purple to brown.


What change that observe?

by the burning of ammomium dichromate it gave a dark green colour


Does the colour of potassium permanganate persist when it is added initialy to heated 3ml of ethanol?

When potassium permagnate is added initially to ethanol, ethanol gets oxidised into ethanoic acid using potassium permagnate. Thus, decolorizing potassium permagnate. When excess is added , the color of potassium permagnate persists.


Why does the colour of potassium permanganate changes to brown when react with ethanol?

When potassium permanganate reacts with ethanol, it undergoes reduction, resulting in a color change from purple to brown. The purple color of potassium permanganate is due to the permanganate anion (MnO4-) in an alkaline medium, and when it is reduced by ethanol, it forms manganese dioxide (MnO2), which is brown in color.


Why the color of potassium perpanganate disappears if it is added to warm solution of ethanol?

When potassium permanganate reacts with ethanol, it releases oxygen. ie, an atom of oxygen thus converting the ethanol to acetic acid. Initially colour disappears because coloured permanganate ions of potassium permanganate are consumed to oxidise ethanol. C 2 H 5 OH (WITH ALKALINE KMnO 4) CH 3 COOH+H 2 O Remember :When excess is added colour does not change because there is no more alcohol left and hence there is no reaction.


Why does a colour change takes place while titrating mohr's salt against potassium dichromate?

From orange to (yellowish) green: It is a powerfull oxidant, used to titrate Fe2+ from Mohr's salt to the oxidised form Fe3+ by the following: Cr2O72−(aq) + 14H+ + 6e− → 2Cr3+(aq) + 7H2O


What colour is potassium bromide solution?

The colour of aqueous potassium permanganate ranges from violet to lighter shades of purple depending on its concentration.Please see the related link below to see an image bench scale testing of potassium permaganate showing the range of colour that it can appear.


What colour does a universal indicator change to when it is mixed with ethanol?

A universal indicator changes to a greenish-blue color when mixed with ethanol.


How do you prepare 1 N potassium dichromate?

prepare a concentrated aqueous solution of di chromate and add solid KOH warm till orange colour change to yellow and then filter the solution the filtrate is allow to evaporate and get solid potassium chromate.