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In: Chemistry

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

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

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

  2. A [a] mL volume of an H2A acid solution of unknown concentration with 2 drops of phenolphthalein required [b] mL of [c] M NaOH to reach the endpoint. What is the molar concentration of the acid solution?
    [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 HCl for neutralization. What is the percent of NaOH in the sample? Show your work.

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Expert Solution

queen_honey_blossom answered 1 year ago
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