Question

Why does barium react with hcl but not with sulphur acid

Answer 1

Explanation:

Only to those metals which react with (dilute) H2SO4 forming an isoluble layer (sulphate, oxide, ecc). PbSO4 is also insoluble (but less insoluble than BaSO4). Note that, instead, concentrated H2SO4 does dissolve those sulphates because they react forming hydrogen sulphates, which are soluble:

BaSO4 + H2SO4 <--> Ba(HSO4)2

Aluminum also is insoluble in that acid because it forms a tick layer of Al2O3. Tin also should be insoluble. Other metals as Cu, Ag, Au, Pt, ecc., are too noble to react with a generic non-oxidant acid.

by rithvik301 brainly

Answer 2

Answer:

Explanation:

H2SO4 reacts with Ba forming BaSO4 which is insoluble, so it forms a thin layer on the metal's surface, preventing a further action of the acid.