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Zina [86]
2 years ago
13

why is often necessary to follow extensive purification procedures in the isolation of organic compounds?​

Chemistry
1 answer:
GREYUIT [131]2 years ago
6 0

To remove impurities

<u>Explanation:</u>

  • There are different substances present in  an organic compound. If an organic compound contains different substances then there are some physical or chemical methods for the process of isolation, so that we will get different substances from the organic compound, which may or may not contain impurities.
  • To get rid of impurities after the isolation process purification process has to be done, so that we will get a purified substance from an organic compound.
  • Purification may be done using the method of sublimation, distillation and so on.
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 a) 1.866 × 10 ⁻¹⁹ J      b)   3.685 × 10⁻¹⁹ J

Explanation:

the constants involved are

h ( Planck constant) = 6.626 × 10⁻³⁴ m² kg/s

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a) the Ek ( kinetic energy of the dislodged electron) = 0.5 mu²

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b) Φ ( minimum energy needed to dislodge the electron ) can be calculated by this formula

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v ( threshold frequency ) = c / λ where c is the speed of light and λ is the wavelength of light = 358.1 nm = 3.581 × 10⁻⁷ m

v = ( 3.0 × 10 ⁸ m/s ) / (3.581 × 10⁻⁷ m ) = 8.378 × 10¹⁴ s⁻¹

hv = 6.626 × 10⁻³⁴ m² kg/s ×  8.378 × 10¹⁴ s⁻¹ = 5.551 × 10⁻¹⁹ J

5.551 × 10⁻¹⁹ J = 1.866 × 10 ⁻¹⁹ J + Φ

Φ = 5.551 × 10⁻¹⁹ J - 1.866 × 10 ⁻¹⁹ J = 3.685 × 10⁻¹⁹ J

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