Răspunsuri

2014-05-11T15:11:40+03:00
Md=ms*c/100=>md NaOH = 600*40/100=240 g
md=md*c/100=>md H2SO4 = 980*20/100=490 g 
490 > 240 => exces de acid => solutia va avea un caracter acid
In solutie acida,turnesolul se coloreaza in rosu.