Podcast
Questions and Answers
The endpoint in the protein determination titration, in the presence of bromocresol green indicator, is when you obtain the ______ color.
The endpoint in the protein determination titration, in the presence of bromocresol green indicator, is when you obtain the ______ color.
red
Which compound plays the role of a catalyst in the Kjeldahl method?
Which compound plays the role of a catalyst in the Kjeldahl method?
- K2SO4 (correct)
- CuSO4
- NaOH
- (NH4)2SO4
Which equipment(s) must be calibrated before use:
Which equipment(s) must be calibrated before use:
- Pycnometer
- (a) and (b)
- (a) and (c)
- (b) and (c)
- Hydrometer
- Refractometer (correct)
- None of these
The refractive index (RI or n) depends on:
The refractive index (RI or n) depends on:
Flashcards
Protein Titration Endpoint
Protein Titration Endpoint
The point in the titration where the solution turns black, indicating the completion of the reaction with bromocresol green indicator.
Catalyst in Kjeldahl Method
Catalyst in Kjeldahl Method
The compound that speeds up the digestion of the sample in the Kjeldahl method is ammonium sulfate, (NHâ‚„)â‚‚SOâ‚„.
Titrated Compound in Kjeldahl
Titrated Compound in Kjeldahl
The compound that is titrated with hydrochloric acid (HCl) in the Kjeldahl method to determine the amount of nitrogen is ammonia (NH₃).
Equipment Calibration
Equipment Calibration
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Degree Brix
Degree Brix
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Refractive Index
Refractive Index
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Kjeldahl Method
Kjeldahl Method
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Bromocresol Green
Bromocresol Green
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Pycnometer
Pycnometer
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Refractometer
Refractometer
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Study Notes
Protein Determination Titration
- Endpoint color in protein determination titration with bromocresol green indicator is yellow.
Kjedahl Method
- Catalyst in the Kjedahl method is (NHâ‚„)â‚‚SOâ‚„.
- Compound titrated with HCl is NH₃.
Equipment Calibration
- Pycnometer, hydrometer, and refractometer require calibration before use.
Sucrose Solution Concentration
- A 12% sucrose solution contains 1.2g of sucrose in 100g of sample.
Refractive Index
- Refractive index (RI or n) depends on light wavelength, temperature, and solution concentration.
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Description
Test your knowledge on protein determination titration, the Kjedahl method, and equipment calibration. This quiz covers essential concepts such as the endpoint color with bromocresol green and the calibration of various instruments. Dive into the specifics of sucrose solution concentration and the refractive index.
