Which metal do you expect to react according to the stoichio

Which metal do you expect to react according to the stoichiometry given M(s) + 2 HCl(aq) ? MCl2(aq) + H2(g) a.cesium b.aluminum c.potassium d.indium e.barium

Then You analyze a sample of unknown metal Atmospheric pressure, Patm, is measured as 28.97 inHg. You measure the water temperature to be 22

Solution

Barium because this metal exist in stable Ba+2 state where others do not have stable +2 state..

Now for second part of rkn the eqn is

M(s)+2H20 (l)=M(OH)2(aq)+H2

Now total pressure =atmospheric pressure=760mm Hg=1 atm=partial pressure( H2+H20)

so partial pressure H2=1-0.0165atm=0.9835atm=747mm Hg