Example:Supposing 0.20L of 0.10molL-1 ammonia solution is added to the same volume of 0.50mol L-MgCl2,will a precipitate of Mg(OH)2 form?In order to preventing Mg(OH)2 from precipitating out of the solution,what is the minium quantity grams)of solid NHCI(s)to be added to the solution?(Suppose the volume of the solution has no change after adding solid NHCI) Example： Supposing 0.20L of 0.10mol·L-1 ammonia solution is added to the same volume of 0.50mol·L-1 MgCl2 ，will a precipitate of Mg(OH)2 form？In order to preventing Mg(OH)2 from precipitating out of the solution, what is the minium quantity ( grams) of solid NH4Cl(s) to be added to the solution？ (Suppose the volume of the solution has no change after adding solid NH4Cl)