Starch solutions must be made-up fresh before an experiment. A week-old starch solution tested positive with Benedict's solution (B3) and gave a red color change with iodine. What does that mean about the starch solution?

Starch solutions must be made-up fresh before an experiment. A week-old starch solution tested positive with Benedict's solution (B3) and gave a red color change with iodine. What does that mean about the starch solution?

Curren'S Math For Meds: Dosages & Sol

11th Edition

ISBN:9781305143531

Author:CURREN

Publisher:CURREN

Chapter9: Parenteral Medication Labels And Dosage Calculation

Section: Chapter Questions

Problem 4.1P

See similar textbooks

Related questions

Q: Copper corrodes in moist air to produce a green layer on its surface, Explain the cause with…

A: Metals are defined as the natural inorganic compounds present in the earth's crust, in which they…

Q: When doing a lab the tube has 0.5% starch and 25% sucrose/iodine in the beaker. Wouldn’t this be a…

A: 0.5% starch means 0.5 grams of starch dissolved in 100 mL of solvent (such as water). 25%…

Q: Which of the following WILL INCREASE gelling if addition of Ca2+ ions was added? a. starch b.…

A: Gelation is a process where formation of 3D network of polymers from monomers.

Q: Why might physicians resort to calling HDLs and LDLs “good” and “bad”?

A: Lipids are biomolecules that have long hydrocarbon chains composed of carbon, hydrogen, and oxygen.…

Q: Which acid in each pair has the higher melting point and explain why Arachidonic acid or Archidic…

A: Arachidic acid is also known as eicosanoic acid. It is a saturated fatty acid and does not have…

Q: Why does glucose not give positive results with an iodine test but not starch?

A: The iodine-starch test is a chemical reaction that is used to presence of starch which gives intense…

Q: KOH (aq) is added to a solution of Fe(NO3)3

A: This is the experiment of a precipitation reaction. When two solutions containing soluble salts are…

Q: the stationaryphase is a thinlayer of silicagel or aluminaon a glass,metal or plasticplate?

A: The item to be separated is selectively adsorbed on the stationary phase of a chromatography system,…

Q: This highly unstable agent can react strongly with DNA and proteins. a. ethylene oxide b.…

A: Deoxyribonucleic acid (DNA) is the hereditary material in humans and almost all other organisms,…

Q: Table 3. Testing for Starch Results ww w w m Starch Hypothesis (Starch +/-) Sample Initial Color…

A: Starch-iodine test: presence of starch in a sample is determined by the addition of iodine solution…

Q: part 1What is the % w/v of a 250ml solution containing 120mg of sucrose? part 2What is the % v/v of…

A: 1. weight of solute (sucrose)= 120 g volume of solution = 250 ml % w/v = [ weight of solute(g) /…

Q: Which molecule is responsible for the blue color in blue essential oils? Choose one answer. a.…

A: Lipids are one of the major macromolecules that are necessary for the growth and development of…

Q: When X-rays penetrate cells, electrons are ejected from atoms of molecules. Stable molecules can be…

A: X-rays X rays are the high frequency electromagnetic radiation and con not be seen. The frequency…

Q: Discuss the properties of potassium iodide solution, and how it results in the detection of starch.…

A: Starch is a complex polysaccharide that is made of glucose units joined together by beta glycosidic…

Q: Some dried beans with a 14C/12C ratio one-eighth of the current value are found in an old cave. How…

A: The primary way for the age determination of an old sample is carbon dating. The carbon-14 is…

Q: How should the manufacturer design the experiment? In order to compare the strength of the film and…

A: Starch films usually contain amylose, amylopectin, water, andor other plasticizers, and they are…

Q: What should happen when you add magnesium salts to the soap solution and then what happens when you…

A: Soap is a cleansing and emulsifying agent that is made usually by action of alkali on fat or fatty…

Q: Name at least three test reactions for lipids. Briefly explain the the principle of each test and…

A: A group of organic compounds includes lipids that are insoluble or poorly soluble in…

Q: In a hurry one day, you merely rinse your lunch disheswith water. As you are drying your salad bowl,…

A: Polar molecule have regions that have opposite charges due to presence of uneven numbers of…

Q: Why efficascent oil is green liquid?

A: Efficascent oil is a liniment for the treating pains associated with muscles and joints. It is…

Q: In a lab experiment, there was yeast added to four different test tubes. One tube has water, one…

A: Answer Yeast belongs to fungus group The four different test tubes will show different results…

Q: What is the use of color reaction tests for proteins in diagnosing diseases? Give an example too!

A: Diagnostics, which can diagnose illness, disorders, or infections, is quickly becoming a critical…

Q: hich compound is more likely to absorb at 200-

A: Amino acids Proteins are the polymers of nitrogenous compounds called amino acids. Each amino acid…

Q: a sample that contains a carbohydrate delivers a negative starch iodine test. what does this result…

A: Introduction: Carbohydrates are polyhydroxy aldehydes or polyhydroxy ketones with a molecular…

Q: While performing the Biuret test, a student added HCl instead of NaOH. How will a resulting solution…

A: Biuret test is the specific test for the identification of proteins in a sample solution. Biuret…

Q: You conduct Lugol's iodine test to determine if starch is present in a solution. The solution…

A: The food components contain different biomolecules including carbohydrates, fats, proteins and…

Q: Imagine that we heated the starch with H2SO4 for about 2 hours. What would you expect for the…

A: Starches are forms of carbohydrates that provide energy for the cells. Under specific reactions,…

Q: What happens if we combine jello in a water solution with electricity?

A: There are three basic types of mixtures, solution, suspension, and colloids. A solution is a…

Q: how do you seperate startch and sugar in water. what happens if you pour iodine into sheets what…

A: In research, the separation of a mixture of compounds into their pure components is essential. It…

Q: You conduct Lugol's iodine test to determine if starch is present in a solution. The solution…

A: Answer ; Starch is not present in the solution. - in iodine starch test we get orange or yellow…

Q: By testing for starch using iodine solution. No starch Has starch A

A: Iodine test on leaves is done to demonstrate whether starch is present in the leaf or not. If the…

Q: particles

A: Generally in diet the cooked and frozen eggs are trmendously used to improve health.the cold drinks…

Q: Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a…

A: A cis arrangement implies that when there is a double bond, the neighboring carbon atoms are on the…

Q: your hospital pharmacy makes a fortified tobramycin eyedrops that is 13.6% in a 10 ml bottle. How…

A: The ratio of mass of solute present in a solution relative to the volume of the solution represents…

Q: Give the positive result for the test of ribose Give the positive result for the test of…

A: Since you have asked a question with multiple subparts, we will answer only three subparts for you.…

Q: Why do oil and water mixed together separate into layers?

A: Water is known as the ‘universal solvent as it is capable of dissolving a variety of different…

Q: Why doesn’t the starch leave the cellulose bag and move into the beaker solution?

A: Starch Starch is a polysaccharide. It is a primary storage carbohydrate of plants. Starch is…

Q: What is the detection principle of iodine test for starch

A: The iodine test is a quantitative analysis of carbohydrates to distinguish polysaccharides from…

Q: Which of the following statements is TRUE about the band of molecules labeled X ( close to where it…

A: Agarose gel electrophoresis is carried out to separate DNA fragments under the influence of an…

Q: Which of the following substances aren't phenolics? a. lignin b. isoflavones c. isoflavones d.…

A: Plant secondary metabolites are the chemicals which are the product of primary metabolism and play…

Q: Marissa is working with a solution that is very acidic. When she tests the solution with pH paper,…

A: pH scale : 7 is neutral, more than 7 is basic pH and less than 7 is acidic pH. Acidic solution :…

Q: Why should starch solution be freshly prepared

A: The polymeric carbohydrate starch, also known as amylum, is made up of multiple glucose units joined…

Q: High-density polyethylene (HDPE) is opaque while low-density polyethylene (LDPE) is transparent.…

A: * LDPE and HDPE are thermoplastic materials that are petrochemical based plastics includes…

Q: One of the following is a physical denaturation of proteins except: X-ray irradiation Vigorous…

A: Protein denaturation is a wide concept and dependent on multiple factors. whenever the protein is…

Q: You take a bottle of soft drink out of your refrigerator. Thecontents are liquid and stay liquid,…

A: It is known that a bottle of a soft drink is kept in a refrigerator and the content was present in…

Q: Which of the following shows B-D-Gulose? A) B) CH2OH CH2OH OH OH OH OH H. OH OH H H ÓH C) D) E)…

A: Carbohydrates are polyhydroxy aldehydes or ketones which are associated with reducing property and…

Q: Why are mint flavored foods containing menthol perceived as cold and foods containing the chemical…

A: All the sensation in the body are sensed by receptor which generates action potential which is…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Introduction

VIEW

Description

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.

Similar questions

A food factory wants to test the film strength of different types of starch, but the film strength is affected by the film thickness, and it is difficult to control the film thickness during the production process. Only the thickness data of various film samples can be recorded, but when the manufacturer wants to test the film strength , the influence of film thickness can be excluded. How should the manufacturer design the experiment? In order to compare the strength of the film and exclude the influence of the thickness of the film, how should the experiment be randomization?
In the EXPERIMENT PREPARATION OF POTASSIUM IODATE, SODIUM THIOSULFATE AND STARCH SOLUTION Why should starch solution be freshly prepared?
Imagine that we heated the starch with H2SO4 for about 2 hours. What would you expect for the results with the Iodine test on this heated starch solution?
The hydrolysis of starch was stopped when the iodine test no longer gave a blue color. Does this mean that the starch was completely hydrolyzed? Explain.
Which of the following substances aren't phenolics? a. lignin b. isoflavones c. isoflavones d. alkaloids e. anthocyanins
Why does glucose not give positive results with an iodine test but not starch?
When betadine is dropped into a ripe banana, does this turn into orange/brown or blue-black? Does a ripe banana contain starch? Take not that unripe and ripe banana has different results.
When doing a lab the tube has 0.5% starch and 25% sucrose/iodine in the beaker. Wouldn’t this be a hypotonic environment because the solution has a lower concentration then what’s in the tube?
Why egg whites and milks are used as antidotes for heavy metal poisoning?
Why do animal fats and vegetable oils become rancid when exposed to moist warm air?
A. Biuret TestMix 1 mL of sample with 1 mL of 5% NaOH. Add 2 – 3 drops of 1% CuSO4. Question 1: What is the chemical equation of the reaction. Will it give positive reactions to all types of proteins? How about peptides and amino acids? Explain briefly.
The test for starch in water is A. silver nitrate. B. iodine. C. barium ions. D. sulfuric acid. E. chloride ions.