3NaOH + FeCl3 → 3NaCl + Fe(OH)3
Using conservation of energy and momentum we get m1*v1=(m1+m2)*v2 so rearranging for v2 and plugging the given values in we get:
(200000kg*1.00m/s)/(21000kg)=.952m/s
PE = mgh
where
m = mass
g = acceleration due to gravity
h = height
