1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elixir [45]
2 years ago
5

New research shows that a red food colouring with an R value of 0.62 (when a particular solvent and temperature are used) could

be dangerous to certain people. Samples of food colouring from two different red sweets were collected and the chromatogram bolow was produced. For each of the sweets, state and explain whether or not you would recommend that the sweets are taken off the market based on this research, ​

Chemistry
1 answer:
svlad2 [7]2 years ago
3 0

It is recommended only for the second type of candy to be taken off the market.

Based on the background information, if a candy shows a 0,62 Rf value in the chromatography it is considered potentially dangerous, and therefore it should be taken off the market.

The Rf value is calculated using the following formula:

  • Rf =  Total distance traveled by a component/ Total distance from the pencil line to the solvent front

Now, let's find out if any of the components has an Rf equal to 0,62.

Note: To determine the distances I measured the image using a ruler and you can do the same, this will not alter the results.

  1. Sample 1
  • Total distance traveled by the component: 6cm
  • Total distance: 7 cm
  • Rf : 6 cm/ 7 cm = 0.85

     2. Sample 2

  • Total distance traveled by the component: 4.34cm
  • Total distance: 7 cm
  • Rf : 4.34 cm/ 7 cm = 0.62

This means sample 2 has the 0.62 Rf value and therefore it needs to be taken off the market.

Learn more about chromatography in: brainly.com/question/10296715

You might be interested in
Calculate the molarity of a solution made by dissolving 4.0 g of calcium bromide, CaBr2, in enough water to give 200 mL of solut
Troyanec [42]

Answer:

0.1 M

Explanation:

Molarity = number of moles / litres of solution.

4 g of calcium bromide = 0.02 mol

(found by dividing 4 g by the atomic mass of CaBr2, which is 199.886)

200 mL of solution = 0.2 litres

Molarity = 0.02 mol / 0.2 L = 0.1 M

8 0
2 years ago
At STP, which substance has metallic bonding?
kogti [31]
Silver has metallic bonding.

Silver is a very typical and main metal. The negatively charged electrons distribute themselves throughout the entire piece of metal and form non directional bonds between the positive silver ions, which is metallic bonding, and what silver contributes.
7 0
3 years ago
Read 2 more answers
PLEASEEEEE HELP MATH EXPERTS<br><br> What is the value of x?
diamong [38]
X=107 because the sides of a hexagon must add up to 720
6 0
2 years ago
How much does a gallon of water WEIGH?
elixir [45]
A gallon of water weighs 8.34 pounds
4 0
3 years ago
Which physical property will change if the amount of the sample changes?​
kramer

Answer:

Extensive Properties

Explanation:

A physical property that will change if the amount of matter changes. Change in which the matter's physical appearance is altered, but composition remains unchanged. Solid is distinguished by a fixed structure. Its shape and volume do not change.

6 0
3 years ago
Other questions:
  • In the reaction 3H2 + N2 → ____ NH3, what coefficient should be placed in front of NH3 to balance the reaction?
    11·1 answer
  • Convert 86,000 cm into km
    6·2 answers
  • What is enthalpy of atomisation
    12·1 answer
  • The weight for this compound is 74. what is the molecular formula​
    5·1 answer
  • Using the two models, compare the processes of nuclear fusion and nuclear fission. What do the two processes have in common?
    15·2 answers
  • Can someone please help me answer that question
    13·1 answer
  • The 4f subshell of an atom contains 14 electrons. What is the maximum number
    8·1 answer
  • Which substance is a binary acid?
    7·2 answers
  • Having the same number of protons and electrons results in a positively charged atom.
    6·1 answer
  • Investigations were carried out in a science lab to explore the topic of chemical and physical changes.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!