Question

HCl=CaCl2=BaCl2=KCl=AgCl

Answer 1

2HCl+Ca=CaCl2+H2

CaCl2+Ba=BaCl2+Ca

BaCl2+K2SO4=BaSO4+KCl

KCl+AgNO3=AgCl+KNO3

Answer 2

It seems like you've listed a series of chemical compounds, all of which contain chloride ions (Cl-) combined with different metal or cation elements. The compounds you've mentioned are:

1. HCl - Hydrochloric acid, a strong acid when dissolved in water.
2. CaCl2 - Calcium chloride, a common salt used for de-icing roads and as a drying agent.
3. BaCl2 - Barium chloride, often used in laboratory settings and in fireworks for its green flame.
4. KCl - Potassium chloride, used as a salt substitute in certain foods and medical applications.
5. AgCl - Silver chloride, often used in photography and as a source of silver in various chemical reactions.

These compounds have different properties and uses based on the specific metal cation they are combined with. Is there something specific you would like to know about these compounds?