Your two barium samples, bacl2 and baso4 gave the same flame color. would you say the color is due to ba or the anions, cl and so4? explain your answer.

Predominantly ,the color is due to cation Ba2+.

Explanation:

Flame Test : The flame due barium cation is Green in color.

Anions  such as Cl- and SO42- slightly (very little) affects the color . Hence ,

BaCl2 and BaSO4 gives Yellow -green flame not pure green

Ba 2+ cation gives green colour because:

It has loosely bounded outermost electron (low ionisation)

It absorb energy from the flame , get excited to higher energy state. When the excited electron comes back to ground state , it emits colour of particular frequency.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.