Does salts react with acids?

Question

I am new to the concepts of reaction between of Acids, Bases and Salts.

While learning, I notice that some salts react with acids to form a new salt and acid (especially in Qualitative Analysis), while some don't even reacts.

Why is it that some salts do not react with acids? Is it because of it's solubility in water or other reasons?

Why do salts even react with acids in the first place, that doesn't make sense to me or is it my mistake?

For example if calcium nitrate reacts with hydrochloric acid to produce calcium chloride and nitric acid, why woundn't the calcium chloride reacts with nitric acid again to form back calcium nitrate and hydrochloric acid?

I'm really confused, desperately need a help from you smart guys

thanks.

Answer 1

More often than not, if a reaction starts, it typically goes past the equilibrium point and then it begins to move in reverse towards that point.  In your example, the CaCl2 does react with the HNO3 which then produces the Ca(NO3)2 and the HCl.  And it keeps changing directions, producing products then producing reactants, until it reaches that equilibrium point.