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A [a]ml aliquot of a nitric acid of unknown concentration is pipetted into 125-ml Erlenmeyer flask...

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Chemistry

  1. A [a]ml aliquot of a nitric acid of unknown concentration ispipetted into 125-ml Erlenmeyer flask and 2 drops ofphenolphthalein are added. The [b] ml of sodium hydroxide withconcentration [c]mol/l is used to titrate the nitric acid solution.What is the molar concentration (mol/l) of the nitric acidsolution?

    For [a], [b], and [c] each student would have a different set ofdata. Practice how to solve this problem if [a] =20.00ml of nitricacid, [b] =17.60ml of NaOH, and [c] =0.1092M NaOH.

  2. A [a] mL volume of an H2A acid solution of unknown concentrationwith 2 drops of phenolphthalein required [b] mL of [c] M NaOH toreach the endpoint. What is the molar concentration of the acidsolution?
    [a]= 22.51ml

    [b]=24.62ml [c]=0.1201 M NaOH

  3. A 0.200-g sample of impure NaOH required 18.25ml of 0.2406 M HClfor neutralization. What is the percent of NaOH in the sample? Showyour work.

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