one.

After 25 g of pure NaH solid is completely dissolved in a 500 mL flask, 100.

The mL is taken into a flask and titrated with the adjusted HCl acid solution. to the turning point

Calculate the concentration of the acid, since a total of 12.3 mL of HCl acid is consumed to reach the

(mol/L). (Na: 23 g/mol; O:16 g/mol; CI:35.5 g/mol; H:1 g/mol) (20p)