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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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Chapter
Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 15, Problem 30E
Textbook Problem
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How do sunscreens protect your skin from the Sun’s rays? What does SPF indicate?

Interpretation Introduction

Interpretation:

The way through which a sunscreen protects the skin from the Sun’s rays is to be stated and SPF is to be indicated.

Concept Introduction:

UV-radiation is electromagnetic radiation. The wavelength of UV-light is greater than 100nm and lesser than 400nm. UV-light is generally of two types, that is, UV-A, which has a wavelength between 320nm-400nm and UV-B, which has a shorter wavelength and high energy.

Explanation of Solution

A sunscreen is typically a lotion that contains a chemical compound to protect the skin from UV-radiation, especially UV-B range. Melanin is present in the skin, which protects the skin from UV-light. Because UV-light has more energy than visible light, more exposure to UV-light leads to skin cancer. The chemical compounds in sunscreen prevent the UV-B range from getting to the skin. The chemical compounds present in a sunscreen, used for UV-absorption, are p-aminobenzoicacid(PABA

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Chapter 15 Solutions

Chemistry In Focus
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