Question

29. When 24.0 mL of 0.100 M NaOH was reacted with 20.0 mL of H$_2$SO$_4$ of unknown molarity, the final solution was 0.0375 M in H$_2$SO$_4$. Calculate the molarity of the original H$_2$SO$_4$ solution. The equation for the reaction is given below. 2 NaOH + H$_2$SO$_4$? Na$_2$SO$_4$ + 2 H$_2$O 30. 35.00 mL of 0.100 M H$_3$PO$_4$ required 60.00 mL of KOH for complete neutralization. Calculate the molarity of KOH. The reaction is: H$_3$PO$_4$(aq) + 3 KOH(aq) ? K$_3$PO$_4$(aq) + 3 H$_2$O(l) 31. In a titration of 0.3825 g of a diprotic acid (generic formula: H$_2$A), 28.55 mL of 0.1613 M NaOH are needed to reach the equivalence point. Calculate the molar mass of this acid.

          29. When 24.0 mL of 0.100 M NaOH was reacted with 20.0 mL of H$_2$SO$_4$ of unknown molarity, the
final solution was 0.0375 M in H$_2$SO$_4$. Calculate the molarity of the original H$_2$SO$_4$ solution. The
equation for the reaction is given below.
2 NaOH + H$_2$SO$_4$? Na$_2$SO$_4$ + 2 H$_2$O
30. 35.00 mL of 0.100 M H$_3$PO$_4$ required 60.00 mL of KOH for complete neutralization. Calculate the
molarity of KOH. The reaction is:
H$_3$PO$_4$(aq) + 3 KOH(aq) ? K$_3$PO$_4$(aq) + 3 H$_2$O(l)
31. In a titration of 0.3825 g of a diprotic acid (generic formula: H$_2$A), 28.55 mL of 0.1613 M NaOH are
needed to reach the equivalence point. Calculate the molar mass of this acid.

29. When 24.0 mL of 0.100 M NaOH was reacted with 20.0 mL of H2SO4 of unknown molarity, the
final solution was 0.0375 M in H2SO4. Calculate the molarity of the original H2SO4 solution. The
equation for the reaction is given below.
2 NaOH + H2SO4? Na2SO4 + 2 H2O
30. 35.00 mL of 0.100 M H3PO4 required 60.00 mL of KOH for complete neutralization. Calculate the
molarity of KOH. The reaction is:
H3PO4(aq) + 3 KOH(aq) ? K3PO4(aq) + 3 H2O(l)
31. In a titration of 0.3825 g of a diprotic acid (generic formula: H2A), 28.55 mL of 0.1613 M NaOH are
needed to reach the equivalence point. Calculate the molar mass of this acid.

Added by William N.

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