Question

Discuss why starch tests positive and turns blue/black for when it comes in contact with iodine...

Discuss why starch tests positive and turns blue/black for when it comes in contact with iodine but cellulose does not react. Be sure to discuss structure.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

ANS-1.

*************************************Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. ... This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color..

*********************************Since cellulose does not have a helical structure like amylose, it does not bind to iodine to form a coloured product

THANK YOU VERY MUCH ,HOPE THIS WILL HELP YOU

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Why is it that when one of my older silver tooth fillings comes into contact with...
Why is it that when one of my older silver tooth fillings comes into contact with metal stuck on food such as a gum wrapper or aluminium foil, I get intense pain? My guess is that the different types of metal in saliva create a small electrical current. If so, how does this happen?
Discuss why Black Monday, the day when the DJIA declined more than 20%, is not evidence...
Discuss why Black Monday, the day when the DJIA declined more than 20%, is not evidence against the efficient market hypothesis.
Acid-Base Behavior In addition to following the general safety rules, chemicals need to be handled properly....
Acid-Base Behavior In addition to following the general safety rules, chemicals need to be handled properly. In particular, two very important classes of compounds called acids and bases require special attention. These compounds are commonly used reagents in the laboratory; therefore, understanding their proper disposal is beneficial. Physical differences between acids and bases can be detected by the some of the five senses, including taste and touch. Acids have a sour or tart taste and can produce a stinging sensation...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place a piece of copper wire in a weighing paper, determine the mass of the wire and place it in the centrifuge tube. The copper wire should weigh less than 0.0200 grams. 3. In a fume hood, add seven drops of concentrated nitric acid to the reaction tube so that the copper metal dissolves completely. Describe your observations in the lab report. (Caution, Concentrated nitric...
Discuss ethical issues that can be identified in this case and the mode of managing ethics...
Discuss ethical issues that can be identified in this case and the mode of managing ethics Enron finds itself in this case. How would you describe the ethical culture and levels of trust at Enron? Provide reasons for your assessment. THE FALL OF ENRON: A STAKEHOLDER FAILURE Once upon a time, there was a gleaming headquarters office tower in Houston, with a giant tilted "£"' in front, slowly revolving in the Texas sun. The Enron Corporation, which once ranked among...
Read the case and answer the following Multiple choice questions. There are 5 questions total, where...
Read the case and answer the following Multiple choice questions. There are 5 questions total, where some of them might have more than one correct answers. You can choose more than one options where you think is suitable for the above question. PERFORMANCE MANAGEMENT Project Manager Oliver Caine skimmed his notes as he waited for Ben Robins to come to the meeting room. He hoped Ben would arrive soon, as he wanted to get the con-versation finished quickly. Ben walked...
What are 4 key things you learned about the topic from reading their paper? How does...
What are 4 key things you learned about the topic from reading their paper? How does the topic relate to you and your current or past job? Critique the paper in terms of the organization and quality. Team 3 answer questions above. Part I In today’s world we see fear among people when dealing with sexual harassment. This leads to people not reporting sexual harassment. A misconception about sexual harassment is that it’s only about touching and forcing other people...
The project has been performing as planned, and the team members have been exhibiting increasing levels...
The project has been performing as planned, and the team members have been exhibiting increasing levels of trust between each other. The sponsor and the buyer have been satisfied with the delivery of business value, and user acceptance testing results are positive. A technical expert consulting with the team has expressed concerns that the team is not in agreement on the best way to deliver to the next review. If the project manager wants to support the team in reaching...
Team 5 answer the questions What are 4 key things you learned about the topic from...
Team 5 answer the questions What are 4 key things you learned about the topic from reading their paper? How does the topic relate to you and your current or past job? Critique the paper in terms of the organization and quality. Incentive Systems             In this paper, we will focus primarily on financial rewards that companies use to attract, retain and motivate the brightest and most talented candidates in the labor market. By providing a reward system that...
The Business Case for Agility “The battle is not always to the strongest, nor the race...
The Business Case for Agility “The battle is not always to the strongest, nor the race to the swiftest, but that’s the way to bet ’em!”  —C. Morgan Cofer In This Chapter This chapter discusses the business case for Agility, presenting six benefits for teams and the enterprise. It also describes a financial model that shows why incremental development works. Takeaways Agility is not just about the team. There are product-management, project-management, and technical issues beyond the team’s control. Lean-Agile provides...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT