This document describes an experimental activity on chromatography of food dyes for a level five science class. The activity involves students using filter paper to separate mixtures of food dyes through elution with a salt water solution. The teacher's tasks are to introduce the activity, demonstrate how to spot the dyes on filter paper, and help students analyze the results. Students are asked to observe how the salt water causes the dyes to spread and note any separation of color components. They then answer questions about the process and components separated. The activity aims to demonstrate chromatography and separation of mixtures into pure substances or multiple parts.
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Wilt u uw kleding of bedrijfskleding uit Nuenen en omgeving bedrukken?
Met onze strijk logo's bent u snel, mooi en goedkoop klaar voor het bedrukken van uw kleding en bedrijfskleding!
Op http://www.bedrijfs-kleding-bedrukken.nl kunt u met een paar muisklikken stoffen emblemen van foto kwaliteit ontwerpen voor op uw bedrijfskleding.
==== Snel naar www.bedrijfs-kleding-bedrukken.nl of strijklogo.nl voor het bedrukken van een logo op uw bedrijfskleding ====
Na de ontvangst van de strijk logo's zijn ze door uzelf in Nuenen eenvoudig op uw bedrijfskleding te strijken.
Onze strijk logo's zijn kookwasbestendig en chemisch reinigbaar, dus ook na veel wasbeurten blijven de kleuren prachtig!
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Systematic qualitative analysis of organic compounds is a fundamental aspect of pharmaceutical organic chemistry. It involves the systematic identification of functional groups and other characteristic features present in organic molecules. This process typically includes a series of chemical tests and analytical techniques aimed at determining the identity of organic compounds based on their chemical properties and reactions.
The qualitative analysis of organic compounds involves techniques such as:
1. **Solubility tests**: Determining the solubility of the compound in various solvents to infer the nature of functional groups present.
2. **Acid-base reactions**: Testing the compound's behavior in acidic and basic conditions to identify acidic and basic functional groups.
3. **Functional group tests**: Performing specific chemical tests to detect the presence of functional groups such as alcohols, aldehydes, ketones, carboxylic acids, amines, etc.
In addition to qualitative analysis, pharmaceutical organic chemistry also encompasses the analysis of binary mixtures, which involves the identification and separation of two components present in a mixture. Techniques such as fractional distillation, extraction, chromatography, and spectroscopic methods (e.g., infrared spectroscopy, nuclear magnetic resonance spectroscopy) are commonly employed for the analysis of binary mixtures.
The systematic qualitative analysis and analysis of binary mixtures play crucial roles in pharmaceutical research, drug development, quality control, and regulatory compliance in the pharmaceutical industry. These analytical techniques help ensure the purity, identity, and efficacy of pharmaceutical compounds, ultimately contributing to the advancement of healthcare and medicine.
Established in 1967, We Jagdeep Foundry are the leading manufacturer and exporter of complete range of workshop equipments and machine tools accessories. We have been an established and popular company with an excellent track record for the best customer satisfaction. Jagdeep Foundry has acquired a unique blend of technique and technology which has enabled the company to accomplish many feats of excellence. Serving the Heavy Industry, the company has developed many Special Purpose Equipment, Machine Tools & Accessories, Precision Surface and Inspection Equipments, T-Slotted Bed Plates etc
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En twitter @rmaragu
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Systematic qualitative analysis of organic compounds is a fundamental aspect of pharmaceutical organic chemistry. It involves the systematic identification of functional groups and other characteristic features present in organic molecules. This process typically includes a series of chemical tests and analytical techniques aimed at determining the identity of organic compounds based on their chemical properties and reactions.
The qualitative analysis of organic compounds involves techniques such as:
1. **Solubility tests**: Determining the solubility of the compound in various solvents to infer the nature of functional groups present.
2. **Acid-base reactions**: Testing the compound's behavior in acidic and basic conditions to identify acidic and basic functional groups.
3. **Functional group tests**: Performing specific chemical tests to detect the presence of functional groups such as alcohols, aldehydes, ketones, carboxylic acids, amines, etc.
In addition to qualitative analysis, pharmaceutical organic chemistry also encompasses the analysis of binary mixtures, which involves the identification and separation of two components present in a mixture. Techniques such as fractional distillation, extraction, chromatography, and spectroscopic methods (e.g., infrared spectroscopy, nuclear magnetic resonance spectroscopy) are commonly employed for the analysis of binary mixtures.
The systematic qualitative analysis and analysis of binary mixtures play crucial roles in pharmaceutical research, drug development, quality control, and regulatory compliance in the pharmaceutical industry. These analytical techniques help ensure the purity, identity, and efficacy of pharmaceutical compounds, ultimately contributing to the advancement of healthcare and medicine.
Investigatory project chemistry on to study the digestion of starch by salivary amylase and effect of temperature and pH on it and
1)To study digestion of starch by saliva.
2)To study the effect of temperature on the digestion of
starch by saliva.
3)To study the effect of pH on the salivary digestion of
starch.
4. EXPERIMENTAL ACTIVITY : CHROMATOGRAPHY
OF FOOD DYES.
Level : five
Part A of the program : homogeneous
mixtures and pure substances.
1
5. EXPERIMENTAL ACTIVITY : CHROMATOGRAPHY
OF FOOD DYES.
Level : five
Part A of the program : homogeneous
mixtures and pure substances.
Skills and knowledge practiced
1
17. CONDUCTING THE ACTIVITY
Time Teacher’s tasks Students’ tasks
Distribute the document to the students, introduce
5 min Read the document.
the activity.
Present the material, help the students depositing Prepare the filter paper and begin elution (by
10 min
drops of dye on the filter paper. placing the filter paper in salt water).
Pass among groups to give the main rule of Observe salt water "rises" in the filter paper, all
10 min
chromatography : do not move the beaker! note observations.
Help students exploit the chromatogram and Place filter paper in a stove, answer questions
15 min
answer questions. from the sheet.
3
18. CONDUCTING THE ACTIVITY
Time Teacher’s tasks Students’ tasks
Distribute the document to the students, introduce
5 min Read the document.
the activity.
Present the material, help the students depositing Prepare the filter paper and begin elution (by
10 min
drops of dye on the filter paper. placing the filter paper in salt water).
Pass among groups to give the main rule of Observe salt water "rises" in the filter paper, all
10 min
chromatography : do not move the beaker! note observations.
Help students exploit the chromatogram and Place filter paper in a stove, answer questions
15 min
answer questions. from the sheet.
40 min
3
19. CONDUCTING THE ACTIVITY
Time Teacher’s tasks Students’ tasks
Distribute the document to the students, introduce
5 min Read the document.
the activity.
Present the material, help the students depositing Prepare the filter paper and begin elution (by
10 min
drops of dye on the filter paper. placing the filter paper in salt water).
Pass among groups to give the main rule of Observe salt water "rises" in the filter paper, all
10 min
chromatography : do not move the beaker! note observations.
Help students exploit the chromatogram and Place filter paper in a stove, answer questions
15 min
answer questions. from the sheet.
40 min
3
24. ANSWERS
What happens between the salt water and the
filter paper?
5
25. ANSWERS
What happens between the salt water and the
filter paper?
The water rises along the filter paper causing the dye
to spread
5
26. ANSWERS
What happens between the salt water and the
filter paper?
The water rises along the filter paper causing the dye
to spread
Have you separated the components during this
experiment? Explain, naming the separated
components.
5
27. ANSWERS
What happens between the salt water and the
filter paper?
The water rises along the filter paper causing the dye
to spread
Have you separated the components during this
experiment? Explain, naming the separated
components.
Only the green dye is separated into
two distinct tasks of colours :
yellow and blue
5
28. ANSWERS
What happens between the salt water and the
filter paper?
The water rises along the filter paper causing the dye
to spread
Have you separated the components during this
experiment? Explain, naming the separated
components.
Only the green dye is separated into
two distinct tasks of colours :
yellow and blue
The green dye is not a pure substance
5
32. CONCLUSION: KEY WORDS
« chromatography »
« separate components »
« homogeneous mixture »
6
33. CONCLUSION: KEY WORDS
« chromatography »
« separate components »
« homogeneous mixture »
« eluent »
6
34. CONCLUSION: KEY WORDS
« chromatography »
« separate components »
« homogeneous mixture »
« eluent »
« pure substance »
6
35. CONCLUSION: KEY WORDS
« chromatography »
« separate components »
« homogeneous mixture »
« eluent »
« pure substance »
« several parts »
6
36. THANK YOU FOR YOUR ATTENTION
7
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