1) How many milliliters of a 0.100 M NaOH solution are needed to neutralize 15.0 mL of 0.200 M H₃PO₄?

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2) If 24.7 mL of 0.250 M NaOH solution are needed to neutralize 19.8 mL of H₂SO₄, solution, what is the molarity of the H₂SO₄?

3) 25.0 g of 5.0% (by mass) acetic acid solution are titrated with 0.300 M NaOH. What volume of NaOH will be needed to neutralize this sample?

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