What makes a cream precipitate?
What makes a cream precipitate?
bromide ions give a cream precipitate of silver bromide.
What gives a white precipitate?
Magnesium, calcium, zinc, lead, aluminium ions will give white precipitates with OH- ions.
What was the colour of the precipitate formed?
(i) The colour of the precipitate is yellow. The name of compound formed as a precipitate is Pbl2 (lead iodide). —-> BALANCED EQUATION. This is an example of double displacement reaction.
What causes the white precipitate in the sulfate test?
Testing for sulfate ions in dilute sulfuric acid solution Add barium chloride to dilute sulfuric acid solution. It will give a white precipitate, barium sulfate. Separate the precipitate from the solution and add a dilute acid such as HCl to the precipitate. Precipitate does not dissolve in dilute acid.
What colour does copper II sulfate turn in the presence of water?
blue
When water is present in a sample of copper(II) sulfate it turns blue.
Which ions form white precipitates with sodium hydroxide?
A white precipitate is formed when sodium hydroxide is added to solutions containing aluminum ions (Al+3), calcium ions (Ca+2) or magnesium ions (Mg+2).
Which precipitate is white Coloured?
Precipitate tests
| Metal ion | Result on adding NaOH or NH 3 solution | Effect of adding excess NaOH solution |
|---|---|---|
| aluminium, Al 3+ | white precipitate | white precipitate dissolves and a colourless solution forms |
| zinc, Zn 2+ | white precipitate | white precipitate dissolves and a colourless solution forms |
In which reaction a white precipitate is formed?
Double displacement reactions generally take place in aqueous solutions in which the ions precipitate and there is an exchange of ions. For example, on mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is immediately formed. These reactions are ionic in nature.
What is the colour of copper sulphate solution?
Colour of copper sulphate solution changes to pink when iron filings are added….
| Student | Aluminium sulphate solution (I) | Copper sulphate solution (II) |
|---|---|---|
| C | Colourless solution changes to light blue | Blue colour of the solution changes to colourless |
What will be the colour of the precipitate formed at the end *?
The reaction between Pb and KI results in the formation of PbI2, which is yellow in colour. Was this answer helpful?
Why does chloride form a white precipitate?
When a few drops of a silver nitrate solution are added to a slightly acidic aqueous solution that contains chloride ions, a white precipitate of silver chloride will form.
Why is anhydrous copper sulphate white?
In hydrated CuSO4 the water molecules surrounding the Central metal (Cu) function as ligands which bring d-d transition and hence emits blue colour in visible region due which hydrated CuSO4 appears blue and as anhydrous CuSO4 doesn’t have any water of crystallisation hence remains white in colour.
