Аланин+ nh4oh—> ? аланин+hcl—> ?

ch3-сн(nh2)-cooh + hcl → [ch3-сн(nh3)-cooh]+cl-

ch3-сн(nh2)-cooh + nh4oh → ch3-сн(nh2)-coonh4 + h2o

а) h3po4+3naoh=3h2o+na3po4

b) h3po4+3koh=k3po4+3h2o

c) 2h3po4+3ca(oh)2=6h2o+ca3(po4)2

должно быть +2hoh=2naoh+h2o