When you mix solutions of Lead ( II ) , Nitrate and Potassium Iodide
(i) What is the colour of the precipitate form ? Name then compound involved. (ii) Write the balanced chemical equation for the reaction. (iii) What type of chemical reaction has taken place and why ?
When the solutions of lead nitrate and potassium iodide are mixed together, then
(1) a yellow precipitate of potassium iodide is formed.
(2) The balanced chemical reaction for the said reaction is shown as follows
Pb(NO3)2 + 2KI ---------> 2KNO3 + PbI2 (↓)
(3) The chemical reaction of this type is termed as a double displacement reaction as the two involved compounds have exchanged their respective ions. For example, the Pb+2 ion was associated with the NO3- ion before the reaction. After the reaction, it forms a compound with the I- ion. Similarly, the potassium ion, which was earlier associated with the I- ion is associated with the NO3- ion after the reaction.
@ Suril and Medha, very good attempt. Keep it up!!!!