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
- Yellow (correct)
- Pink
- Black
Which compound plays the role of a catalyst in the Kjeldahl method?
Which compound plays the role of a catalyst in the Kjeldahl method?
- NaOH
- K_2SO_4
- (NH_4)_2SO_4
- Cu_2SO_4
Which compound is titrated with HCl in the Kjeldahl method?
Which compound is titrated with HCl in the Kjeldahl method?
- NH_4^+
- NaOH
- NH_3
- H_2BO_3^- (correct)
Which equipment(s) must be calibrated before use?
Which equipment(s) must be calibrated before use?
Degree Brix for a 12% sucrose solution means you have ______.
Degree Brix for a 12% sucrose solution means you have ______.
The refractive index (RI or n) depends on ______.
The refractive index (RI or n) depends on ______.
Flashcards
Protein Titration Endpoint
Protein Titration Endpoint
The endpoint in protein determination titration using bromocresol green indicator is when the solution turns black.
Kjeldahl Method Catalyst
Kjeldahl Method Catalyst
The compound (NH₄)₂SO₄ acts as a catalyst in the Kjeldahl method for determining protein content.
Titrated Compound in Kjeldahl
Titrated Compound in Kjeldahl
In the Kjeldahl method, ammonia (NH₃) is the compound titrated with hydrochloric acid (HCl).
Equipment Calibration
Equipment Calibration
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Degree Brix
Degree Brix
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Refractive Index Factors
Refractive Index Factors
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What is the endpoint in protein determination titration using bromocresol green?
What is the endpoint in protein determination titration using bromocresol green?
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What compound serves as a catalyst in the Kjeldahl method?
What compound serves as a catalyst in the Kjeldahl method?
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Which compound is titrated with HCl in the Kjeldahl method?
Which compound is titrated with HCl in the Kjeldahl method?
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Why do pycnometers and refractometers need calibration?
Why do pycnometers and refractometers need calibration?
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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 (NH₄)₂SO₄.
- Compound titrated with HCl in Kjedahl method is NH₃.
Equipment Calibration
- Pycnometer, hydrometer, and refractometer must be calibrated before use.
Sucrose Solution
- 12% sucrose solution (degree Brix) is 1.2g sucrose in 100g of sample.
Refractive Index
- Refractive index (RI) depends on light wavelength, temperature, and solution concentration.
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Description
Test your knowledge on the procedures and principles of protein determination titration, including the use of indicators like bromocresol green. This quiz also covers the Kjedahl method and essential equipment calibration techniques. Understand the specifics of sucrose solutions and refractive index influences.
