Which element is not conserved in this unbalanced chemical equation? 2NaOH + H2S04 - NaSO4 + 2H20
Ο Α. Η
O B. S
O c. O
O D. Na

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .