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28 April, 06:58

The titration of an impure sample of KHP found that 35.00 mL of 0.050 M NaOH was required to react completely with 0.596 g of sample. What is the percentage of KHP in this sample

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  1. 28 April, 07:16
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    59.97%

    Explanation:

    The equation for the reaction of KPH with NaOH can be given as:

    KHC8H4O4 + NaOH→ KNaC8H4O4 + H2O

    KHP + NaOH → KNaP + H2O

    To get the moles of NaOH.

    Moles of NaOH = 0.0350L NaOH*0.050 mol NaOH/1L NaOH

    =0.00175 mol NaOH

    To get the moles of KHP neutralized by the NaOH.

    Moles of KHP=0.00175 mol NaOH * 1 mol KHP/1mol NaOH

    =0.00175 mol KHP

    we can then calculate the mass of the KHP.

    Mass=0.00175 mol KHP * 204.22 g KHP/1mol KHP

    =0.3574 grams of KHP

    To calculate the purity of the KHP.

    Purity = (mass of pure KHP/mass of impure KHP) * 100%

    = (0.3574g/0.596g) * 100%

    =59.97%
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