Question

Guess and write which two colourless solutions are added to gives out a colour precipitate.​

Answer 1

Answer:

Lead nitrate Pb(NO3)2 and potassium iodide ( KI ) are added to to give a yellow precipitate of lead iodide.

Explanation:

Other examples include

1 ) when sodium chloride and silver nitrate are added to give white precipitate of Silver chloride ( AgCl )

2 ) When sodium iodide and silver nitrate are added to give deep yellow ppt. of Silver iodide.

Answer 2

Two colourless solutions are added to give out a colour precipitate is PbI2.

• When Pb(NO3)2 is reacted with KI then two products are obtained is PbI2 and KNO3.
• The ​two colourless solutions are Pb(NO3)2 and KI
• And the colour precipitate is PbI2 which is yellow in colour.
• It is a double displacement reaction because there is an exchange of ions between potassium iodide[ Pb(NO3)2] and lead nitrate [ KI ].
• The reaction can be expressed as,

                             $Pb(NO_3)_2 + KI \rightarrow PbI_2 + KNO_3$