A precipitate forms when 50.0 mL of 0.200 M Pb(NO₃)₂(aq) is combined with 80.0 mL of…
CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
A precipitate forms when 50.0 mL of 0.200 M Pb(NO₃)₂(aq) is combined with 80.0 mL of 0.150 M Na₂S(aq) according to the reaction Pb²⁺(aq) + S²⁻(aq) → PbS(s). After precipitation is complete, what is the concentration of NO₃⁻(aq) in the remaining solution?
(a) 0.100M
(b) 0.077M
(c) 0.154M
(d) 0.169M