Answer:
<h3>
Explanation:</h3>
In Analytical Chemistry chromatography is widely used for the separation of samples.
- In thin layer chromatography, the mixture of components are separated on the basis of their polarity.
- The solvent solution(mobile phase) that we use are non polar & silica gel( TLC paper made of/stationary phase) are polar.
- Consider the mixture we have taken consist of two samples having large polar difference.
- Due to opposite nature of silica gel(polar) & solvent solution (non polar) the movement become easy & due to capillary action solvent solution rise to the top.
- The mixture of sample we have taken, the sample have less polarity have high peak or they travel more distance than that of more polar sample when they dipped into the solution.
In the given diagram, mixture of 8 samples are separated on the basis of their polarity, the distance travelled by solvent is 35 mm, distance travelled by sample 1 is 11 mm & similarly distance travelled by sample 2,3,4,5,6,7 are 15,31,4,22,25,33 in mm respectively.
Rf Value: Rf value is retention factor which tells about relative absorption of each sample & range of Rf value is 0-1.
Formula to calculate Rf value is
Now, solving for Rf value of sample 1
<em>Given:</em>
Distance moved by sample 1 = 11 mm
Distance movedby solvent = 35 mm
<em>To find:</em>
Rf value of sample 1 = ?
<em>Solution:</em>
Substituting the given data in above formula,
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The correct option is; SUGAR DISSOLVING IN WARM WATER.
There are two types of change in chemistry; physical and chemical changes.
A physical change is a type of change in which no new substance is formed while a chemical change is a type of change in which a new substance is formed.
Dissolving sugar in warm water is a physical change because no new substance is formed and the sugar can easily be recovered from the water by evaporating the water.
Most drugs are salt of either weak acids or weak bases they are absorbed in undissociated lipid soluble form. The dissociation if weak acids is suppressed by low (acid) PH. Thus theoretically one would expect a weak acid to be absorbed primarily in the stomach which has a low ph
12+70= 82 g
(12/82)x100 = 14.6%
The answer is given to one decimal place.
The charged species carrying the positive and the negative charges are called ions. The ionic compounds formed will be NaCl, Na₂SO₄, MgCl₂, and MgSO₄.
<h3>What are ionic compounds?</h3>
Ionic compounds are the substances formed by the interaction and the bond formation between the ions of the opposite charges. A cation of the ion loses an electron to the anion.
The crisscross method is used to determine the ionic compounds from the respective ions. In Na⁺ and Cl⁻, both have charge of one that got canceled to form NaCl.
In Na⁺ and SO₄²⁻, the charges of the ions are crossed to form Na₂SO₄. With ions Mg²⁺ and Cl⁻ the +2 charge of magnesium crosses with chloride ion to form, MgCl₂. Similarly, Mg²⁺ and SO₄²⁻ cross their charges to form MgSO₄.
Therefore, the ionic compounds formed are NaCl, Na₂SO₄, MgCl₂, and MgSO₄.
Learn more about ionic compounds here:
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