Question

15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.22 M lead(II) nitrate solution. What is the concentration of phosphate ions left in solution after the reaction is complete?
A) 0.0 M
B) 0.045 M
C) 0.13 M
D) 0.060 M
E) 0.12 M

Answer 1

Write and balance the equation.
moles Na3PO4 = M x L
moles Pb(NO3)2 = M x L
Determine which reagent is in excess, from that you go to the ppt formed and from that the amounts of reagents not reacted.
Post your work if you get stuck.

Answer 2

chem