Bleach Analysis: The diluted bleach solution mixed with the KI, HCl and some distilled water began as a dark red color that began slowly lighten to yellow as Na 2 S 2 O 3 was added to the solution. As the Na 2 S 2 O 3 continued to be added to the solution, it quickly began to lighten to clear. Discuss the fact that this dilution does not change the amount of bleach put into the flask, but does enable proper mixing to take place and ensure the reaction has goes to completion.
If a ‘thick’ bleach is used, add approximately 25 cm 3 deionised water. Elements: Chlorine (Cl), Sodium (Na), Oxygen (O) Molecular weight: 74.442 g/mol. Molecular formula: NaClO, NaOCl or ClNaO.
Also known as: Sodium oxychloride, 14 aqueous solution. After the starch solution was sprayed into the solution, it turned a dark blue color. Use a plastic syringe to measure out 5 cm 3 of the first bleach into the flask. Sodium hypochlorite, 14 aqueous solution appears as colorless or slightly yellow watery liquid with an odor of household bleach. (one part bleach and nineteen parts water) yields 6,250 ppm or a 0.625 hypochlorite solution, for use within.
#MMASS PER VOLUME BLEACH TRIAL#
DATA: Solution Mass of KIO 3 (g) Volume of Diluted Solution (mL) Diluted KIO 3 0.685 250 Solution Volume of Bleach (g) Volume of Diluted Solution (mL) Diluted Bleach 12.5 250 Lab Trial # Mass of KI (g) Volume of HCI (mL) Volume of Na 2 S 2 O 3 Used (mL) Standardization 1 1.010 3.00 17.30 Standardization 2 1.002 3.00 17.00 Lab Trial # Mass of KI (g) Volume of HCI (mL) Volume of Na 2 S 2 O 3 Used (mL) Bleach Analysis 1 2.007 2.00 16.50 Bleach Analysis 2 2.000 2.00 15.80 Observations Standardization: The diluted KIO 3 solution mixed with the KI, HCI, and some distilled water began has a dark red color that began to slowly lighten to a yellow color as the Na 2 S 2 O 3 was added.
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