A 50 ml aliquot of 0.05 M NaCN (Ka for HCN = 6.2* 10-10) is titrated with 0.1 M HCI. The reaction is CN + H, O* Calculate the PH after the addition of (a) zero ml (b) 10 ml (c) 25 ml (d) 26 ml of acid and draw the titration HEN +H,0 curve.

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

Ihat will happen if i added baking soda to vinegar