Balanced chemical equation is:
H2SO4 + 2 NaOH ---> Na2SO4 + 2 H2O
Here:
M(H2SO4)=0.743 M
V(H2SO4)=5.00 mL
V(NaOH)=25.0 mL
According to balanced reaction:
2*number of mol of H2SO4 =1*number of mol of NaOH
2*M(H2SO4)*V(H2SO4) =1*M(NaOH)*V(NaOH)
2*0.743*5.0 = 1*M(NaOH)*25.0
M(NaOH) = 0.2972 M
Answer: 0.297 M
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