Asolution, s1, of yellow #5 has an absorbance far outside the linear region of beer’s law. in order to determine the concentration of this solution, a serial dilution is performed. to make solution s2, 20.00 ml of s1 is diluted to 100.00 ml. to make solution s3, 25.00 ml of s2 is diluted to 100.00 ml. the absorbance of s3 is measured to be 0.628 at 430 nm using a 1 cm cuvette. use the true value of ε and calculate the concentration of solution s1.

The concentration of solution S1 is 5.17 x 10⁻⁴ M.

Explanation:

Bee'rs Law: A = εcl

A: absorbance = 0.628

ε: molar absoptivity = 2.43 x 10⁴ M⁻¹cm⁻¹

c: molar concentration

l:pathlength = 1 cm

S3:

c = A/εl

c = 0.628/2.43 x 10⁴ M⁻¹cm⁻¹ x 1 cm

c = 2.58 x 10⁻⁵ M

2.58 x 10⁻⁵ mol Yellow #5 1000 mL

2.58 x 10⁻⁶ mol Yellow #5  100 mL

S2:

2.58 x 10⁻⁶ mol Yellow #5 25.00 mL

                    x                       100.00 mL

                    x = 1.03 x 10⁻⁵ mol Yellow #5

S1:

1.03 x 10⁻⁵  mol Yellow #5 20.00 mL

                    x                       1000.00 mL

                    x = 5.17 x 10⁻⁴ mol Yellow #5

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

is there any options? maybe im just not seeing them but i need the options to

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