Question

Questions: 1. Write balanced equations for each of the four different acid-base reactions in this experiment. Include phases (s, 1, g, aq) for reactants and products. Naoteit HChagj- NaOH agl+ NH2 (09) t HUiagy NHz 491 HadtNaa (a4) Hao t NaCats HCaHso (44) NH4 ca) + C211202a) t 2. How does the enthalpy of neutralization change when you switch from a strong acid to a weak acid with the same base? From a strong base to a weak base with the same acid? Describe any pattern that you notice from your experimental values. a. Calculate AH for the reaction of sodium hydroxide with hydrochloric acid and for the reaction of ammonia with hydrochloric acid using literature values for the enthalpies of formation, AH°, of the reactants and products. Be sure to use AHr for the appropriate phases of the reactants and products. You may need to use the net ionic equations for one or both 3. reactions. NaOH/НCI: NH3/HCl: b. Calculate the percent error of your experimental values of AHr for these two reactions. NaOH/НCI NH3/HC What volume of 2.0 M NaOH should be used in this experiment if 50.0 mL of 2.0 M were used instead of 2.0 M HCl? Why? H2SO4 4.

Answer 1

NaoH(aa) Hela) Naci (ag)HOCA Tris teaetion is baloonced NaoH(a) He2 2(a) NaeH3 a) Ho(A) This feaetion 13 also balaneed

NH3(aq) Hel Caq) NH4C(a) NH3 (o)He Hg02(a) NHA (a)H3a So,the abole is the balanee d equationg with Phases