Star Wars Empire Strikes Back Main characters: Han Solo Luke Skywalker Princess Leila Dark Vader R2-D2 Chewbacca C-3PO About the author: Donald F. Glut (born February 19, 1944) began his professional career working as a musician, singer and song writer. For most of his career, however, he has made a living as a freelance writer of film and television scripts, novels, comic book scripts, non-fiction and short stories. He is now President of Frontline Entertainments for which he wrote and directed the comedy/fantasy motion picture Dinosaur Valley Girls.
16,5 7,40 740 0,5 11 22 34,0 9,98 998 0,5 2 4 34,5 9,99 999 0,5 1 2 Fosforhappe kontsentratsioon: Kuna kolmandat eksivalentpunki määrata ei õnnestunud, siis arvutasin H3PO4 kontsentratsiooni teise ekvivalentpunkti järgi. Ekvivalentide võrdsuse põhjal ehk ekv(H3PO4) = ekv(KOH) VH3PO4 *CH3PO4 = VKOH *CKOH C ( KOH ) * V ( KOH ) C(H3PO4) = V ( H 3PO 4) 0,0097 * 28,0 C(H3PO4) = = 0,01358 = 0,0136n 20,0 Dissotsiatsioonikonstantide arvutamine: H3PO4 + H2O = H3O+ + H2PO4- (H3PO4) = 0,0136 n (H3O+) = 10-pH = 10-4,80 = 1,58*10-5 (H2PO4-) = C(KOH)*V(KOH)/V(Cola) = 0,0097*8,3/20 = 4,03*10-3 n ( H 3O +) ( H 2 PO 4-) K1 = ( H 3PO 4) K1 = 1,58*10-5*4,03*10-3/0,0136 = 4,68*10-6 H2PO4- + H2O = H3O+ + HPO42-
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