A very small amoutn of radioactive isotope of Pb^(213) was mixed with a non-radioactive lead salt containg 0.01g of Pb (atomic mss 207). The whole lead was brought into solution and lead chromate was prcipitated by addition of a soluabolr chromate. Evaporation of 10cm^(3) fo the supernatentliquid gave a residue having a radioactivity (1)/(24000) of that of the original quanity if Pb^(213) caculate the solubility of lead chromate in mol dm^(-3).

A very small amoutn of radioactive isotope of Pb^(213) was mixed with

1.	A very small amoutn of radioactive isotope of Pb^(213) was mixed with a non-radioactive lead salt containg 0.01g of Pb (atomic mss 207). The whole lead was brought into solution and lead chromate was prcipitated by addition of a soluabolr chromate. Evaporation of 10cm^(3) fo the supernatentliquid gave a residue having a radioactivity (1)/(24000) of that of the original quanity if Pb^(213) caculate the solubility of lead chromate in mol dm^(-3).
Answer» ANSWER :`2.0xx10^(-7)MOL DM^(-3)`