+1Aqueous potassium iodide, Kl (aq) is added to a solution of lead (11) nitrate Pb(NO3)2, resulting in potassium nitrate, KNO3(aq) and a yellow solid (also called a precipitate in this situation).
Identify the yellow solid from the list below and explain your thinking.
a. PbI2(aq)
b. PbI2 (s)
c. Pb(No3)2(s)
d. KI(s)

b) PbI2(s)

Explanation:

because Iodide is not soluble with lead II and forms precipitate.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.