Question

${Ag}^{+}$ and ${Pb}^{2+}$ ions are preciptated together by the addition of:

• A. aq.${NH}_3$
• B. $K_2{C}_2{O}_4$ solution
• C. dil.${HNO}_3$
• D. $KI$ solution
• E. none of these

Answer 1

Answer: (B), (D)

$K_2{C}_2{O}_4$ solution
$KI$ solution

${Ag}^{+}$ and ${Pb}^{2+}$ ions are preciptated together by addition of $K_2{C}_2{O}_4$ solution and $KI$ solution.
With $K_2{C}_2{O}_4$ solution, ${Ag}^{+}$ and ${Pb}^{2+}$ ions form precipitates of silver oxalate and lead oxalate respectively.
With $KI$ solution, ${Ag}^{+}$ and ${Pb}^{2+}$ ions form precipitate of silver iodide and lead iodide reaspectively.