need help with 3&4

Post Lab (100 points): 1. (20) Write the four net ionic reactions observed in the electromotive series investigation. Remember to use charges on ions! 2. (10) How many did you predict correctly? If your predictions were incorrect, do you understand how you misinterpreted the electromotive series? Make a statement to help you remember how to interpret the series. 3. (20) Consider Ag,Cu,Na,Zn and H. a. Place them in relative order of reactivity (most to least reactive) b. Consider Sr, which is not noted on your list, where might it fall in this series relative to the Zn, before (more reactive) or after (less reactive)? Use your periodic table to help you decide. 4. Use the electromotive series to decide if a reaction would occur between each of the following combinations: Circle those that would occur. a. (5) Al metal and Ca2+ (aq) b. (5) Fe3+(aq) and Zn metal c. (5) HCl(aq) and Ag metal d. (5) H2SO4(aq) and K(s) e. (10) Consider a and b above, write the net ionic reaction for the one reaction that takes place spontaneously. How many electrons are exchanged in this reaction? f. (10) Consider c and d above, write the net ionic reaction for the one that will occur spontaneously. How many electrons are exchanged in this reaction? 5. (10) Consider the titration reaction. Identify the oxidizing agent the reducing agent and number of electrons exchanged