why the refractive index is a good way to analyze the liquid?

Expert Solution

One of the most common uses of the refractive index is to compare the value you obtain with values listed in the literature. This comparison is used to help confirm the identity of the compound and/or assess its purity. The refractive index depends on the temperature. Thus, it is best to obtain the refractive index of your sample at the same temperature as the value you plan to compare with; in most cases this will be 20 °C. For most organic liquids the index of refraction decreases by approximately 0.00045 ± 0.0001 for every 1 °C increase in temperature.

Determining the concentration of a solute in a solution is probably the most popular use of refractometry. For example, refractometer-based methods have been developed for determining the percentage of sugar in fruits, juices, and syrups, the percentage of alcohol in beer or wine, the salinity of water, and the concentration of antifreeze in radiator fluid. Many industries use refractometer-based methods in quality control applications. In most cases the refractive index is linearly (or nearly linearly) related to the percentage of dissolved solids in a solution. By comparing the value of the refractive index of a solution to that of a standard curve the concentration of solute can be determined with good accuracy. Many refractometers contain a "Brix" scale that is calibrated to give the percentage (w/w) of sucrose dissolved in water.

The refractive index does not provide detailed information about a molecule's structure, and it is not usually used for this purpose since spectroscopic techniques are much more powerful at revealing details of molecular structure. One structural factor that influences the refractive index of a sample is its polarizability. Substances containing more polarizable ("soft") groups (e.g., iodine atoms or aromatic rings) will normally have higher refractive indexes than substances containing less polarizable ("hard") groups (e.g., oxygen atoms or alkyl groups).

queen_honey_blossom answered 2 years ago

4. Liquid A has a refractive index of 1.415 and liquid B has a refractive index...

4. Liquid A has a refractive index of 1.415 and liquid B has a refractive index of 1.524. A solution is prepared by mixing liquid A with liquid B. If the refractive index of the resulting solution is 1.457, does the solution have more of liquid A or more of liquid B? What is the % Liquid A in the mixture?

1. what is refractive Index 2. Why is it use in chemistry 3.What does it mean when two substances have the same refractive index?

Please exaplain in detail:1. what is refractive Index2. Why is it use in chemistry3.What does it mean when two substances have the same refractive index?For example:If our product (isoamyl acetate) has a RI=1.407 and the true values or RI of isoamyl alcohol is 1.407 and the true value for isoamyl acetate is= 1.400What does that mean?

For the next question, note that benzene has a refractive index of 1.6, and air has a refractive index of 1.0.

For the next question, note that benzene has a refractive index of 1.6, and air has a refractive index of 1.0.A plano-concave lens made of crown glass of refractive index 1.5 will beGroup of answer choicesa converging lens in both benzene and air.a diverging lens in both benzene and air.a converging lens in benzene but a diverging lens in air.a diverging lens in benzene but a converging lens in air.none of the above.

A soap bubble is floating in the air. The refractive index of the bubble is n...

A soap bubble is floating in the air. The refractive index of the bubble is n = 1.33. The width of the wall is 115 nm. The light that hits the bubble is reflected on the outer and inner surface and both interfere once they leave. The difference in phase for both for both lights will be wt, where t is the time it takes for the light to go and return through the soap layer (t = d /...

A thin film of MGF2 has a refractive index of n = 1.38 and it is...

A thin film of MGF2 has a refractive index of n = 1.38 and it is deposited on glass as an anti-reflective layer of light with a wavelength of 580nm which falls in the normal direction towards the film. What wavelength is minimally reflected when the light falls at 45 ° towards the film?

a step-index optical fiber with a core diameter of 80μm has a relative refractive index difference...

a step-index optical fiber with a core diameter of 80μm has a relative refractive index difference of 1.5% with a core refractive index of 1.48 at a wavelength of 850nm. how many modes in the optical fiber?

A plate of glass with parallel faces having a refractive index of 1.52 is resting on...

A plate of glass with parallel faces having a refractive index of 1.52 is resting on the surface of water in a tank. A ray of light coming from above in air makes an angle of incidence 36.0 with the normal to the top surface of the glass. What angle does the ray refracted into the water make with the normal to the surface? Use 1.33 for the index of refraction of water.

A thin uniform film of refractive index 1.750 is placed on a sheet of glass with...

A thin uniform film of refractive index 1.750 is placed on a sheet of glass with a refractive index 1.50. At room temperature ( 24.0o C), this film is just thick enough for light with a wavelength 582.9 nm reflected off the top of the film to be canceled by light reflected from the top of the glass. After the glass is placed in an oven and slowly heated to 164o C, you find that the film cancels reflected light...

A film of oil lies on wet pavement. The refractive index of the oil exceeds that...

A film of oil lies on wet pavement. The refractive index of the oil exceeds that of the water. The film has the minimum nonzero thickness such that it appears dark due to destructive interference when viewed in red light (wavelength = 640.0 nm in vacuum). Assuming that the visible spectrum extends from 380 to 750 nm, for which visible wavelength(s) in vacuum will the film appear bright due to constructive interference?

Make the curvature radius 0.6 , the refractive index 1.5, and the diameter 0.6 . Place...

Make the curvature radius 0.6 , the refractive index 1.5, and the diameter 0.6 . Place the lamp so that the source of light is 120 from the middle of the lens (use the ruler). The focal length of the lens is ____________, and the focal plane is ___________ from the lens. 120 cm / 120 cm 60 cm / 120 cm 60 cm / 60 cm 30 cm / 120 cm 60 cm / 180 cm SubmitHintsMy AnswersGive UpReview Part...

Question