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WHEN TESTED ON MILK- When milk(acid) is added with dilute Sodium Hydroxide it is mixed into an alkaline solution ,the copper sulphate is applied because the copper ions forms a purple complex with the Nitrogen from the peptide chain from the milk.The colour changes from light yellow to light purple.This proves the presence of protein in milk.
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Copper sulphate add to sodium hydroxide result colour?
When copper sulfate is added to sodium hydroxide, a blue precipitate of copper hydroxide is formed. The color change observed is from the initial blue color of copper sulfate to the blue precipitate of copper hydroxide.
What colour does hydrous copper sulphate turn when heated?
Hydrous copper sulphate, when heated, turns into anhydrous copper sulphate and changes its color from blue to white. The blue color comes from the water molecules bound to the copper sulphate crystals, and when heated, these water molecules are removed, resulting in a color change.
Is there any colour change when sulfuric acid is mixed with sodium hydroxide?
Yes, when sulfuric acid is mixed with sodium hydroxide, a neutralization reaction occurs to form water and sodium sulfate. The color change that may occur will depend on the concentrations and purity of the substances being used. Generally, the reaction itself does not produce a noticeable color change.
What is the colour of aqueous solution of ferrous sulphate?
The aqueous solution of ferrous sulphate is typically pale green in color.
What colour is aluminum hydroxide?
Aluminum hydroxide is typically a white, crystalline solid.
Copper sulphate add to sodium hydroxide result colour?
When copper sulfate is added to sodium hydroxide, a blue precipitate of copper hydroxide is formed. The color change observed is from the initial blue color of copper sulfate to the blue precipitate of copper hydroxide.
What is the colour change when sodium hydroxide is added to iron II sulphate?
dark green (but orange - brown if left standing)
What is the change in color in testing for the presence of protein in egg albumin using solution sodium hydroxide and copper sulfate?
Copper sulphate when mixed with a protein will turn purple if the amount of protein is sufficient enough in quantity to trigger the reaction. Planex1234 says; No offense but i think it is starch that turns dark blue - purple. Thetada says: the colour changes are arguably similar. Iodine solution goes blue/black in the presence of starch. The colour that sodium hydroxide / copper sulphate solution goes in the presence of protein is variously described as mauve / purple.
What are the steps to do the biuret test?
1) Add 2cm3 of solution to be tested to a test-tube. 2) Add an equal volume of 5% potassium hydroxide* solution and mix. 3) Add 2 drops of 1% copper sulphate solution and mix. A mauve or purple colour develops if protein is present. *Sodium hydroxide solution can be used instead of potassium hydroxide solution.
When sulphuric acid is added to sodium bicarbonate why does the colour change?
this makes sodium sulphate and CO2
What is the colour of aluminium sulphate solutions?
aluminum sulphate is colourless
What color is a postitive protein test?
The colour would change to a purple, dark purple colour.
What is general test for protein?
1. Add 5 cm3 dilute sodium hydroxide (caustic!) to a 1% solution of albumen (the white part of an egg)2. Then add 1% copper sulphate solution3. A purple colour appears and this indicates that protein is present.
What is Colour of cobalt sulphate?
pink
What is the colour of the solution if zinc is added to copper sulphate solution?
No colour
What color is copper sulphate solution and water mixture?
Copper sulphate's colour is blue.
What is the colour of the crystales of copper sulphate?
Blue
