Question 1 calculate or qualitatively correct titration, Ask an Expert

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Question 1: Calculate or qualitatively correct titration curves for the following acid-base titrations.

(a) 25.0 mL of 0.100 M NaOH with 0.0500 M HCI

(b) 50.0 mL of 0.0500 M HCOOH with 0.100 M NaOH

(d) 50.0 mL of 0.0500 M ethylenediamine with 0.100 M HCI

(e) 50.0 mL of 0.0400 M citric acid with 0.120 M NaOH

(f) 50.0 mL of 0.0400 M H₃PO₄ with 0.120 M NaOH

Question 2:

The protein in a 1.2846-g sample of an oat cereal is determined by the Kjeldahl procedure for organic nitrogen The sample is digested with H₂SO₄, the resulting solution made. basic with NaOH, and the NH₃ distilled into 50.00 mL of 0.09552 M HCl. The excess HCl is then back titrated using 37.84 mL of 0.05992 M NaOH. Given that the protein in grains averages 17.54% w/w N, report the %w/w protein in the sample of cereal.

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