FrontierScience / 6681ea07-9b3a-4a71-9b31-a88212189f27 / A jar of lead(II) chromate (PbCrO4) is spilled into a water well. By further…

A jar of lead(II) chromate (PbCrO4) is spilled into a water well. By further measurements, the pH is found to be 5.24. Given the following relevant equilibria, determine the concentration of `Pb^(2+)` in mol L^-1 to three significant figurse.

For `\( PbCrO_4 (s) \rightleftharpoons Pb^{2+} + CrO_4^{2-} \)` , `K_(s)=2.64⋅10^(−13)` 

For `\( HCrO_4^- \rightleftharpoons H^+ + CrO_4^{2-} \)` , `K_(a)=3.67⋅10^(−7)` 

For `\( 2 CrO_4^{2-} + 2 H^+ \rightleftharpoons Cr_2O_7^{2-} + H_2O \)` , `K_(D)=3.13⋅10¹⁴` 

Think step by step and solve the problem below. At the end of your response, write your final answer on a new line starting with “FINAL ANSWER”. It should be an answer to the question such as providing a number, mathematical expression, formula, or entity name, without any extra commentary or providing multiple answer attempts.

A jar of lead(II) chromate (PbCrO4) is spilled into a water well. By further measurements, the pH is found to be 5.24. Given the following relevant equilibria, determine the concentration of `\( Pb^{2+} \)` in mol L^-1 to three significant figurse.

For `\( PbCrO_4 (s) \rightleftharpoons Pb^{2+} + CrO_4^{2-} \)` , `\( K_s = 2.64 \cdot 10^{-13}  \)` 

For `\( HCrO_4^- \rightleftharpoons H^+ + CrO_4^{2-} \)` , `\( K_a = 3.67 \cdot 10^{-7}  \)` 

For `\( 2 CrO_4^{2-} + 2 H^+ \rightleftharpoons Cr_2O_7^{2-} + H_2O \)` , `\( K_D = 3.13 \cdot 10^{14}  \)` 

Think step by step and solve the problem below. At the end of your response, write your final answer on a new line starting with “FINAL ANSWER”. It should be an answer to the question such as providing a number, mathematical expression, formula, or entity name, without any extra commentary or providing multiple answer attempts.