Question

A student aims to perform a titration to determine the exact concentration of HNO3. The bottle was labeled with only an approximation concentration of 0.5 M. In order to ensure accuracy the volume of the titrant used should be half the 50.0 mL capacity of the burette. The student decides the analyte volume will be 20.0 mL and the titrant will be NaOH. The student sets out to determine the concentration of NaOH needed and the mass required to prepare 1.00 L of titrant. Fill in the missing information to 2 significant figure. The student determines that the concentration of the NaOH solution should be _________ and the mass of NaOH required to prepare 1.00 L of this solution is __________.

Answer 1

The student determines that the concentration of the NaOH solution should be _0.50 M___ and the mass of NaOH required to prepare 1.00 L of this solution is __20 g____.

The molar ratio between NaOH and HNO₃ is 1:1

Therefore, if you analyte has 0.5M approximately,

you can prepare and NaOH titrant solution with the same concentration, which will 0.5M

Also, if you want to prepare 1 L NaOH 0.5M: