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    Normality Problems

    Uploaded by

    Kashif Ameer
    This document contains 7 chemistry problems involving calculations of normality (N), molarity (M), and concentration. The problems cover calculating grams from normality and volume, determining normality from given volumes and concentrations, and calculating percent composition from a neutralization reaction.

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    Attribution Non-Commercial (BY-NC)
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    Normality Problems

    Uploaded by

    Kashif Ameer
    2K views1 page
    This document contains 7 chemistry problems involving calculations of normality (N), molarity (M), and concentration. The problems cover calculating grams from normality and volume, determining normality from given volumes and concentrations, and calculating percent composition from a neutralization reaction.

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    This document contains 7 chemistry problems involving calculations of normality (N), molarity (M), and concentration. The problems cover calculating grams from normality and volume, determining normality from given volumes and concentrations, and calculating percent composition from a neutralization reaction.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as RTF, PDF, TXT or read online from Scribd
    Download as rtf, pdf, or txt
    2K views1 page

    Normality Problems

    Uploaded by

    Kashif Ameer
    This document contains 7 chemistry problems involving calculations of normality (N), molarity (M), and concentration. The problems cover calculating grams from normality and volume, determining normality from given volumes and concentrations, and calculating percent composition from a neutralization reaction.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as RTF, PDF, TXT or read online from Scribd
    Download as rtf, pdf, or txt
    of 1

    Page 1

    CHM 2045 Normality problems

    1. How many grams of H3PO4 are in 175 mL of a 3.5 N solution of H3PO4?


    3.5eq/L*(.175L)*(1mol/3eq)*(97g/mol)=20g

    2. How many grams of NaOH (MW = 40.0) are there in 500.0 mL of a 0.175 N
    NaOH solution?
    0.175 eq/L*(.500L)*(1mol/1eq)*(40g/mol)=3.5g

    3. What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M)


    must be diluted to 200 mL to make a 1.50 N solution of sodium hydroxide?
    200mL*1.50N*(1mol/1eq)*(1/6.00M)=50mL

    4. When 0.500 mol of HC2H3O2 is combined with enough water to make a 300 mL
    solution, the concentration of HC2H3O2 is ______ N.
    .500mol*(1eq/1mol)/.300L=1.67N

    5. In a titration of 35.00 mL of 0.737 N H2SO4, __________ mL of a 0.827 N


    KOH solution is required for neutralization.
    35.00ml*(0.737 meq/mL)/(0.827meq/mL)=31.1

    6. Calculate the concentration (N) of arsenic acid (H3AsO4) in a solution


    if 25.00 mL of that solution required 35.21 mL of 0.1894 M KOH for
    neutralization.
    35.21ml*(0.1894 mmol/mL)*(1meq/1mmol)/(25.00mL)=.2668N

    7. Oxalic acid is a diprotic acid. Calculate the percent of oxalic acid


    (H2C2O4) in a solid given that a 0.7984 g sample of that solid required
    37.98 mL of 0.2283 N Ba(OH)2 for neutralization.
    37.98ml*(0.2283meq/mL)*(1mmolOx.Acid/2meqOx.Acid)*(90mg/mmol)/798.4mg*100=
    48.87%

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