Chem Mastery Conc Stoich Set 2

2 Questions
Chem Mastery Conc Stoich Set 2
Sample Question

H3PO4 + 3 NaOH --> Na3PO4 + 3H2O If 36.0cm3 of H3PO4 react exactly with 80.0cm3 of 0.500 M NaOH, what is the concentration of the phosphoric acid?

0.340M

0.350M

0.360M

0.370M

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Questions and Answers
  • 1. 
    H3PO4 + 3 NaOH --> Na3PO4 + 3H2O If 36.0cm3 of H3PO4 react exactly with 80.0cm3 of 0.500 M NaOH, what is the concentration of the phosphoric acid?
    • A. 

      0.340M

    • B. 

      0.350M

    • C. 

      0.360M

    • D. 

      0.370M

  • 2. 
    BaCl2(aq) + 2AgNO3(aq) --> 2AgCl(s) + Ba(NO3)2(aq) 25.00 mL of a barium chloride solution is titrated with 0.150 M silver nitrate solution. 18.55 mL of the silver nitrate solution is required to completely precipitate the chloride ion as silver chloride. What is the molarity of the barium chloride solution?
    • A. 

      0.0546M

    • B. 

      0.0556M

    • C. 

      0.0566M

    • D. 

      0.0576M