Concentration question? 10 points WILL be rewarded?

Question

20.0 mL of a sodium hydroxide solution of unknown concentration is titrated using 14.37 mL of 0.220M H2SO4 solution. Calculate the concentration of the NaOH solution. The balanced equation for the reaction is

H2SO4 (aq) + 2NAOH (aq) ---> NA2SO4 (aq) + 2H2O (l)

Answer 1

10

Answer 2

here goes

14.37mL of 0.220M H2SO4 contains (0.22/1000 x 14.37) = 0.0032moles

since from the equation one mole H2SO4 reacts with 2 moles NAOH twice as many moles of NAOH are present = 0.0064 moles

this amount of moles is present n the 20 mL of NAOH used in the reaction

therefore the conc of NAOH (0.0064/20 x 1000) =0.32M