Question

Explain the action of dilute hcl acid with magnesium and crushed egg shell

Answer 1

Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g) 
and
Crushed egg shell --> CaCO3

HCl + CaCO3 --> CaCl2 + CO2 + H2O