Chem Mastery Conc Stoich Set 3

2 Questions
Chem Mastery Conc Stoich Set 3
Sample Question

3KOH(aq) + H3PO4(aq) --> K3PO4(aq) + 3H2O(l) 25.00cm3 of a phosphoric acid solution required 27.55cm3 of a 0.155 M potassium hydroxide solution for neutralization. What is the molarity of the acid?

0.0549M

0.0559M

0.0569M

0.0579M

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Questions and Answers
  • 1. 
    3KOH(aq) + H3PO4(aq) --> K3PO4(aq) + 3H2O(l) 25.00cm3 of a phosphoric acid solution required 27.55cm3 of a 0.155 M potassium hydroxide solution for neutralization. What is the molarity of the acid?
    • A. 

      0.0549M

    • B. 

      0.0559M

    • C. 

      0.0569M

    • D. 

      0.0579M

  • 2. 
    Ca(OH)2(aq) + 2HCl(aq) -->  CaCl2(aq) + 2H2O(l) 25.00cm3 of a 0.0525 M calcium hydroxide solution is titrated with 0.111 M hydrochloric acid solution. What volume of acid is needed for complete neutralization?
    • A. 

      23.6cm3

    • B. 

      24.6cm3

    • C. 

      25.6cm3

    • D. 

      26.6cm3