Why skin Colour is continuous variation?
And clearly hair color, skin color and eye color all fall under the definition of a continuous trait, because even though they dont seem to be affected by the environment, they are definitely polygenic traits and show a gradation, so they’re definitely continuous traits.
What decides skin color?
Skin colour is primarily determined by genetic inheritance but exposure to sunlight also alters skin colour. Melanin is the pigment that determines skin colour as well as hair and eye colour. Melanin is produced by skin cells when they are exposed to the sun. The more sun exposure, the more melanin is produced.
What is an example of continuous variation?
Human height is an example of continuous variation. It ranges from that of the shortest person in the world to that of the tallest person. Any height is possible between these values. So it is continuous variation.
What are the causes of continuous variation?
Differences in external environmental conditions also produce continuous variation. In nature, each character will be influenced by many environmental variables, some tending to increase it, others to decrease it.
What is the method of continuous variation?
The method of continuous variation, or Job’s method as it is commonly called, has been commonly used in laboratory experiments in instrumental analysis classes to determine metal-to-ligand ratios in complex formation reactions.
What is continuous variation used for?
The method of continuous variation, often known as the Job plot, has long been used for determining the stoichiometry of two interacting components. The correct binding ratio, n, is generally obtained when the total concentration of the reactants, C(o), is much greater than the dissociation constants involved.
What is Job’s method?
A Job plot, otherwise known as the method of continuous variation or Job’s method, is a method used in analytical chemistry to determine the stoichiometry of a binding event. The method is named after Paul Job and is also used in instrumental analysis and advanced chemical equilibrium texts and research articles.
What is mole ratio method?
In the molar ratio method, a property of a solution is plotted against the molar ratio of the two reactants, the concentration of one being kept constant. The stoichiometry of the complex or complexes formed is deduced from the position of breaks in the curve. For this purpose themolar-ratio method is often used.
Why is mole ratio important?
1 Answer. Mole ratios are important because mole ratios allow you change moles of a substance to moles of another substance. The mole ratio is the magic that changes from A to B. The mole ratios come from the chemical formula or equation.
Which ligand is used in mole ratio method?
An innovative ligand exchange method involving the displacement of Fe(III) or Cu(II) ion by a ligand such as EDTA from the corresponding metal-salicylate complex has been developed to determine the mole ratio of the metal-ligand complex.
What is the basic principle of mole ratio method for determining stoichiometry of metal ligand complexes?
An alternative to the method of continuous variations for determining the stoichiometry of metal-ligand complexes is the mole-ratio method in which the amount of one reactant, usually the moles of metal, is held constant, while the amount of the other reactant is varied.
How do you calculate stoichiometry of a reaction?
Thus, to calculate the stoichiometry by mass, the number of molecules required for each reactant is expressed in moles and multiplied by the molar mass of each to give the mass of each reactant per mole of reaction. The mass ratios can be calculated by dividing each by the total in the whole reaction.
How do you determine ligand metal ratio in a complex by spectrophotometry?
If a line parallel to the ordinate is drawn from this point to the x-axis, the ratio of the two parts of the x-axis to the left and to the right (α/β) gives the metal to ligand molar ratio in the complex formed.
What is the key to stoichiometric calculations?
Converting amounts of substances to moles—and vice versa—is the key to all stoichiometry problems, whether the amounts are given in units of mass (grams or kilograms), weight (pounds or tons), or volume (liters or gallons).