Question

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Solid lead nitrate is slowly added to 175 ml of a 0.0407 M sedium chloride solution. The concentration of lead ion required to just initiate precipitation is Submit Answer Retry Entire Group 9 more group attempts

Answer 1

Pb (NO₂) + 2 NaCl - PbCl + 2 NaNO3 coefficient of Pb(NO3)2 – moles of Pb(NO3)2 coefficient of Nall moles of Nall – moles of Pb(NO3)2 MXV(L) moles of Pb(NO₃) = 0.0407MX 175X10SL - 3.56 x 103 moles moles of Pb - moles of Pb(NO3)2 moles of Pb2 = 3.56 x 10-3 moles Molarity of Ph² = moles of Pb Volume of solution 3.56 x 10-3 moles 175 X 10-3 L = 0.0203 M