Electromagnetic Spectrum and Water Solubility
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Questions and Answers

What is the relationship between frequency and wavelength of light?

Frequency and wavelength are inversely proportional. Higher frequency means shorter wavelength, and lower frequency means longer wavelength.

As the frequency of light increases, the energy of the photons also increases.

True (A)

A longer wavelength corresponds to a greater photon energy.

False (B)

Which of the following types of electromagnetic radiation has the shortest wavelength?

<p>Gamma rays (B)</p> Signup and view all the answers

Which of the following types of electromagnetic radiation has the lowest energy?

<p>Radio waves (C)</p> Signup and view all the answers

What is the difference between a polar molecule and a non-polar molecule?

<p>A polar molecule has an uneven distribution of charge across the molecule, leading to a positive and negative end (dipole moment), while a non-polar molecule has an even distribution of charge.</p> Signup and view all the answers

Why is water a good solvent for many ionic compounds?

<p>Water is a polar molecule, and ionic compounds are also polar. The charges of the water molecules can interact attractively with the charges of the ions in the ionic compound, causing it to dissolve.</p> Signup and view all the answers

Why are Iron(III) hydroxide and Hexane (C6H14) not very soluble in water?

<p>Iron(III) hydroxide is ionic, but it's not very soluble in water because it's a very strong base. Hexane is non-polar, and water is polar. Like dissolves like, and therefore they do not mix well.</p> Signup and view all the answers

Flashcards

Speed of Light Equation

The speed of light (c) is calculated by multiplying wavelength (λ) and frequency (ν): c = λν

Wavelength and Frequency Relationship

Higher frequency means shorter wavelength, and vice versa.

Electromagnetic Spectrum

A range of all electromagnetic radiation, ordered by wavelength and frequency, from long radio waves to short gamma rays.

Radio Waves

Longest wavelength, lowest energy electromagnetic radiation used for communication and broadcasting.

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Microwave

Electromagnetic radiation with wavelengths shorter than radio waves, used for cooking and communication.

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Infrared Radiation

Electromagnetic radiation between visible light and microwaves, felt as heat.

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Visible Light

Electromagnetic radiation our eyes can see, creating colors of the rainbow.

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Ultraviolet Radiation

Higher energy electromagnetic radiation than visible light, causes sunburns.

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X-ray Radiation

High-energy electromagnetic radiation that can penetrate objects, used in medical imaging.

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Gamma Ray

Highest energy electromagnetic radiation, used in medical treatment and radiation therapy.

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Polar Molecule

A molecule with uneven distribution of charge, creating a positive and negative end.

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Water's Polarity

Water is a polar molecule because oxygen attracts electrons more strongly than hydrogen, creating a partial negative charge on oxygen and partial positive charges on hydrogens.

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Polar Molecule Solubility

Polar molecules tend to dissolve in other polar solvents, like water.

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Iron(III) Hydroxide Solubility

Iron(III) hydroxide is not very soluble in water because it's an ionic compound with a strong attraction between its ions.

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Hexane Solubility

Hexane is a nonpolar molecule and therefore not very soluble in water.

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Solubility and Polarity

Solubility depends on the polarity of molecules: polar dissolves in polar, nonpolar dissolves in nonpolar.

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Study Notes

Electromagnetic Spectrum Relationships

  • Speed of light = wavelength x frequency (C = Av)
  • Higher frequency = higher photon energy, shorter wavelength
  • Lower frequency = lower photon energy, longer wavelength

Electromagnetic Spectrum

  • Ranges from radio waves to gamma rays
  • Wavelengths are measured in meters
  • Radio waves have the longest wavelength and lowest energy
  • Gamma rays have the shortest wavelength and highest energy
  • Examples of types of EM radiation: Radio, Micro, Infrared, Visible, Ultraviolet, X-ray, Gamma

Water Solubility

  • Water is a polar molecule.
  • Polar molecules dissolve other polar molecules.
  • Nonpolar molecules do not dissolve in water.
  • Iron(III) hydroxide and hexane are not very soluble in water because they are not polar.

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Description

This quiz explores the relationships within the electromagnetic spectrum and the principles of water solubility. Learn how wavelength and frequency relate to photon energy, and discover the solubility characteristics of polar and nonpolar molecules. Test your understanding of these fundamental concepts in physics and chemistry.

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