Question

Fund the initial and final volumes of the reactant snd then determine thr molarity of HBr.

#4) When HBr and NaOH are mixed, a neutralization reaction occurs. To determine the molarity of HBr, it was titrated with 0.500 M NaOH. Read the burettes below to find the initial and final volumes of the reactants, and then determine the molarity of HBr. [5pts] HBr Volumes (Left = Initial, Right = Final): NaOH Volumes (Left - Initial, Right - Final):

Answer 1

Volume of HBr = final-intial = 30.0 - 15.0 = 15.0 mL

Volume of NaOH = final - intial = 40.0 - 0.0 = 40.0 mL

Molarity of NaOH = 0.500 M

Hence,

We know that,

V_HBr × M_HBr = V_NaOH × M_NaOH

M_HBr = 40.0 mL × 0.500 M / 15.0 mL = 1.333 M

Molarity of HBr = 1.333 M .