A certain brand of antacid contains magnesium hydroxide as the active
ingredient. Describe how you conduct an experiment to determine the
percentage by mass of magnesium hydroxide in a tablet of this antacid
with known mass by titration using the following chemicals and apparatus:
Standard hydrochloric acid, distilled water, methyl orange, burette and
common glassware.
State the expected observation of the experiment.
Chemistry question about titration
2008-08-24 6:22 pm
回答 (2)
2008-08-25 7:17 pm
but he didn't provide NaOH
2008-08-24 9:43 pm
Magnesium hydroxide is an insoluble solid. Therefore, it is not advisable to perform a direction titration against standard HCl.
Usually, a back titration is performed. An excess standard HCl is added first to dissolve all Mg(OH)2, and the unreacted acid is then titrated against standard NaOH.
Usually, a back titration is performed. An excess standard HCl is added first to dissolve all Mg(OH)2, and the unreacted acid is then titrated against standard NaOH.
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