A saturated solution of NaCl is treated with concentrated HCl. When NaCl is dissolved in water, the following equilibrium system is established:
NaCl(s) ⇌ Na+(aq) + Cl-(aq)
The white precipitate formed is crystallized NaCl.
1. In which direction (forward or reverse) does the addition of HCl push the equilibrium system?
2. Which ion is responsible for this effect?