assignment3

assignment3 - Assignment: Carbonate & Hydroxide Ions...

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Assignment: Carbonate & Hydroxide Ions and Citric Acid in Soft Drink 1 Quantitative Analysis of a Mixture and a Single Component in a Soft Drink (I) Determination of a Mixture of Hydroxide and Carbonate Ions (II) Determination of Citric Acid in Soft Drink Part I – Determination of a Mixture of Hydroxide and Carbonate Ions MSDS: Na 2 CO 3 This should be included in the EXPERIMENTAL section. Include the following items, if possible. Hazards : Handling and Storage : Disposal : SAMPLE CALCULATION: 1. Show how the concentrations of hydroxide and carbonate ions are calculated. PRELABORATORY QUESTION : 1. What does primary standard mean in analytical chemistry? 2. Explain how to prepare 500-mL 0.1 M HCl from 12 M HCl solution? Ans . 4.2-mL 3. Estimate the total number of grams of Na 2 CO 3 (s) that are needed to standardize the prepared ~500-mL 0.1 M HCl (assuming that (a) four titrations are performed, (b) bromocresol green (bcg) is used as the indicator, and (c) each titration uses ~20-mL HCl)? Ans.
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This note was uploaded on 10/28/2010 for the course CHEM 100A taught by Professor Dai during the Winter '06 term at UCSD.

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assignment3 - Assignment: Carbonate & Hydroxide Ions...

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