Answer to Question #251526 in General Chemistry for Larah

Question

Determine how many mL of 0.102M NaOH solution are needed to neutralize 35.0 mL of 0.125M H2SO4 solution

Answer 1

balanced equation :

2 NaOH + H2SO4 → Na2SO4 + 2H2O

 

0.250 g NaOH x 1 mol/39.9g = 0.0063 mol - from molar mass of NaOH

 

0.0063 mol x 1mol H2SO$/2 mol NaOH = 0.00315 mol H2SO4 - number of moles H2SO4 needed from balanced equation

 

0.00315 mol H2SO4 x 1000mL/ 0.125 mol = 25.2 mL - using molarity of H2SO4 given

 

Answer: 25.2 mL H2SO4