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Question

Calculate the concentration of the following acids given their pH.[3](b) H24 [3]

    (a) HCl, pH 0.65                                                      

    SO,pH 2.61                                                   

    2. 56 M solution of HCl was titrated with a solution of NaOH of unknown concentration. When a 20.00 cm3 aliquot of the HCl was used, the following results were obtained: 

    Titration no 1 2 3 4 5


    Final burette reading /cm3 20.64 40,62 20,70 41,08 20,88


    Initial burette reading/cm3 0,52 20,74 0,62 21,12 0,78


    Volume delivered/cm3

    •   Identify the three acceptable titration results, and use them to calculate the average volume delivered.    [3]
    • Write a balanced chemical equation for the titration reaction.                                            [2]
    • Calculate the average moles of HCl used.                                                              [3]
    • Calculate the average moles of NaOH.                                                                [3]
    • Calculate the Molarity of NaOH


    Final burette reading / cm3 : 20

    initial delivered /cm3


    1. Identify the three acceptable titration results, and use them to calculate the average volume delivered.       [3]
    2. Write a balanced chemical equation for the titration reaction.                                            [2]
    3. Calculate the average moles of HCl used.                                                              [3]
    4. Calculate the average moles of NaOH.                                                                [3]
    5. Calculate the Molarity of NaOH.                                                                      [3]

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    Subject: Chemistry, Science

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