Question

The NaOH solution was standardized using the following system. The balanced neutralization reaction is

2 NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2 H2O(l)

Three flasks containing 25.00 mL H2SO4 each was titrated with NaOH. The standard sulfuric acid concentration is 0.150M. The data is below:

                                  Titration 1 Titration 2 Titration 3

Starting volume buret 1.10 mL 24.56 mL 1.76 mL

Buret volume at end    24.34 mL 47.52 mL 24.86 mL

a. Calculate the volume of NaOH that was added in each titration. 

b. Determine the average volume of NaOH added among the three trials. 

c. What was the concentration of NaOH?

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