化學題一問........

AgNO3 + HCl --> AgCl (s) + HNO3
molar mass of Ag is 107.868 g
molar mass of H is 1.0079 g
molar mass of H2O is 18.0152 g
For the original solution, let there is n mole of AgNO3
so n mole of Ag+ and n mole of NO3-
the HCl solution added is also n mole of HCl in order to 完全反應
so n mole of H+ and n mole of Cl- and k mole of water (in the original solution of HCl)
由於反應後溶液的質量恰好等於原AgNO3溶液的質量，
n * 107.868 = n * 1.0079 + k * 18.0152
n * 106.8601 = k * 18.0152
n / k = 0.168587
1 liter of water is equal to 1000 / 18.0152 moles
= 55.5087 moles
Molarity (M or molar) denotes the number of moles of a given substance per litre of solution.
So the molarity of HCl is 0.168587 * 55.5087
= 9.358 M
I hope this can help your understanding. =)

Ag+ + Cl- --> AgCl