Question

506 » Assi Day 24: K Learn Use titration to determine the molar concentration of an unknown solution Question Calculate the molar concentration for H2SO4 when 41 mL of it was completely titrated by 10.9 mL of 0.95 M LiOH, where one mole of acid was titrated by two moles of base. Give your answer in two significant figures. rovide your answer below. м FEEDBACK

Answer 1

INTRODUCTION: The concept to be used here is, that 1 mole of H SO, requires 2 moles of LiOH to completely neutralize. Thus, the moles of H2SO, neutralized will be equal to half of the moles of LiOH used. SOLUTION: Calculate given moles of LiOH as shown below: Moles Molarity = Volume (L) Moles = Molarity x Volume (L) = 0.95 mol x10.9x10-> { = 0.010355 mol [::-1 mL = 10-*L] 2 moles of LiOH will neutralize = 1 mole of H2SO4 1 mole of LiOH will neutralize = = moles of H2SO4 0.010355 moles of LiOH will neutralize = 0.010355x==0.0051775 moles of H,SO. Calculate the molarity of H2SO, as shown below: Moles Molarity = Volume (L) 0.0051775 mol 41x10-PL = 0.126M ::1 mL = 10L Hence, the molarity of H2SO, up to two significant figures is 0.13 M.