Fundamentals Of Analytical Chemistry
9th Edition
ISBN: 9781285640686
Author: Skoog
Publisher: Cengage
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Describe the preparation of 1100 mL of 6.00 M HNO, from the
commercial reagent that is 91% HNO;(w/w) and has a specific gravity of
2.11.
Oral rehydration salts are stated to contain the following components:
Sodium Chloride 3.5g
Potassium Chloride 1.5g
Sodium Citrate 2.9g
Anhydrous Glucose 20.0g
8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were:
Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5.
Atomic weight of Na = 23.
The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.
The stated should be 104.5, how??
Oral rehydration salts are stated to contain the following components:
Sodium Chloride 3.5g
Potassium Chloride 1.5g
Sodium Citrate 2.9g
Anhydrous Glucose 20.0g
8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were:
Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5.
Atomic weight of Na = 23.
The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.
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