Edta is a hexaprotic system with the pka values: pka1=0.00 , pka2=1.50 , pka3=2.00 , pka4=2.69 , pka5=6.13 , and pka6=10.37 . the distribution of the various protonated forms of edta will therefore vary with ph. for equilibrium calculations involving metal complexes with edta , it is convenient to calculate the fraction of edta that is in the completely unprotonated form, y4− . this fraction is designated − . calculate − at two ph values.

What human activity increases beach erosion?

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.