Question

Determine the number of molecules in 30.0mL of 2.0mol/L of Hydrochloric Acid

Answer 1

Answer:

NaOH + HCl -> NaCl + H2O

Since it is one mole of HCl react with one mole of NaOH, you can simplify the equation as :

M1 x V1 = M2 x V2

M1 = Molarity of HCl

V1 = Titration volume of HCl

M2 = Molarity of NaOH

V2 = Volume of NaOH used

Example:

20ml of 0.1M HCl was used to neutralize 50ml NaOH solution during titration.

20 x 0.1 = M2 x 50

M2 = 0.04 M