A 0.1255 g sample containing dimethylphthalate, C6H4(COOCH3)2 and unreactive species was refluxed with 50.00 mL of...
A 0.1255 g sample containing dimethylphthalate, C6H4(COOCH3)2 and unreactive species was refluxed with 50.00 mL of 0.1031 M NaOH to hydrolyze the ester groups.
C6H4(COOCH3)2 + 2OH- = C6H4(COO)22- + 2CH3O H
After the reaction was complete, the excess NaOH was back titrated with 24.27 mL of 0.1644 M HCl. Calculate the % hydrogen in the sample.
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A 0.1255 g sample containing dimethylphthalate, C6H4(COOCH3)2
and unreactive species was refluxed with 50.00 mL of...
6. (10 points) A 0.9929-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19 g/mol), and unreactive (inert) species was...
6. (10 points) A 0.9929-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19 g/mol), and unreactive (inert) species was refluxed with 50.00 mL of 0.1215 M NaOH to hydrolyze the ester groups (this process is called saponification). C6H4(COOCH3)2 + 2OH- C6H4(COO)22- + 2CH3OH. After the reaction was complete, the excess NaOH was back-titrated with 24.53 mL of 0.1613 M HCl. Calculate the percentage of dimethylphthalate in the sample.
O.9471 g sample dimethylphthalate C6H4(COOCH3)2 (M.M.=194.19 g/mole) and unreactive species was reflux with 50.00 ml of...
O.9471 g sample dimethylphthalate C6H4(COOCH3)2 (M.M.=194.19 g/mole) and unreactive species was reflux with 50.00 ml of 0.1215 M NaOH to hydrolyze the ester group. After the reaction was complete, the excess NaOH was back-titrated with 24.27ml of 0.1644 M HCl. Calculate the percentage of dimethylphthalate in the sample
A 50.00-ml NaOH sample of unknown concentration was titrated with 0.1274 M HCI.
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50.00-ml. sample containing acetic acid (CH.COOH, F.W. 60.05) was transferred into a 550.0-ml. volumetric flask and...
50.00-ml. sample containing acetic acid (CH.COOH, F.W. 60.05) was transferred into a 550.0-ml. volumetric flask and diluted to the mark with water. A 25.00-ml portion of the dilute solution was titrated with 25.47 mL of 0.1012 M NaOH solution to the end point. Calculate the "% (w/v) of acetic acid in the sample. Keep appropriate number of significant figures for the result. (10 points)
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A 0.2726 g sample of metal was dissolved in 50.00 mL of 0.500 M HCl. After...
A 0.2726 g sample of metal was dissolved in 50.00 mL of 0.500 M HCl. After all the metal had dissolved, the leftover acid was titrated with 0.1054 M NaOH. If 24.36 mL of 0.1054 M NaOH were required to neutralize the leftover acid, what was the atomic mass of the metal? The metal dissolved to form M+2 ions in solution. The correct answer is 24.3g, please show all your work, thank you.
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50.00-ml. sample containing acetic acid (CH.COOH, F.W. 60.05) was transferred into a 550.0-ml. volumetric flask and diluted to the mark with water. A 25.00-ml portion of the dilute solution was titrated with 25.47 mL of 0.1012 M NaOH solution to the end point. Calculate the "% (w/v) of acetic acid in the sample. Keep appropriate number of significant figures for the result. (10 points)
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