Acids & Bases in Food Science Flashcards
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Questions and Answers

What is matter?

Everything that has mass and takes up space.

What is an acid?

A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red.

What is a base?

A chemical species that donates electrons or hydroxide ions or that accepts protons.

What is baking soda?

<p>Sodium bicarbonate, the chemical compound with the formula NaHCO₃.</p> Signup and view all the answers

What is vinegar?

<p>A liquid consisting mainly of acetic acid and water.</p> Signup and view all the answers

What does pH measure?

<p>The acidity or basicity of an aqueous solution.</p> Signup and view all the answers

What is the pH scale?

<p>Measures how acidic or basic a substance is, ranging from 0 to 14.</p> Signup and view all the answers

What is an acid-base indicator?

<p>A substance that indicates the degree of acidity or basicity of a solution through color changes.</p> Signup and view all the answers

What does red litmus paper indicate?

<p>It turns red with a pH below 4.5.</p> Signup and view all the answers

What does blue litmus paper indicate?

<p>It turns blue with a pH above 8.2.</p> Signup and view all the answers

Study Notes

Matter

  • Defined as everything possessing mass and occupying space.
  • Encompasses all physical substances in the universe.

Acid

  • Chemical substance that neutralizes alkalis and can corrode metals.
  • Characteristically sour; changes litmus paper to red.
  • Plays a crucial role in processes such as food digestion.

Base

  • Chemical species that donates electrons or hydroxide ions.
  • Accepts protons; often appears slippery to the touch.
  • Solids that counteract acids in chemical reactions.

Baking Soda

  • Chemical formula: NaHCO₃; known as sodium bicarbonate.
  • Appears as a crystalline white solid, often in powder form.
  • Commonly used in cooking and baking, and has applications in oral hygiene.

Vinegar

  • Primarily composed of acetic acid and water.
  • Produced through the fermentation of ethanol by acetic acid bacteria.
  • Widely used in cooking, pickling, and food preservation.

pH

  • Measurement of acidity or basicity in aqueous solutions.
  • pH value of less than 7 indicates acidity, while a value greater than 7 indicates basicity.
  • Essential in food science to understand flavor profiles and preservation.

pH Scale

  • Ranges from 0 to 14, determining the acidity of a substance.
  • A pH of 7 represents neutrality; values below are acidic, above are basic.
  • Used in various scientific applications, including food science.

Acid-Base Indicator

  • A substance that shows the degrees of acidity or basicity through color changes.
  • Useful in determining the pH level of solutions in experiments and cooking.

Red Litmus Paper

  • Changes color to red when exposed to solutions with a pH below 4.5.
  • Employed to test for acidic properties in various contexts.

Blue Litmus Paper

  • Changes color to blue in the presence of solutions with a pH above 8.2.
  • Used to identify basic properties of substances.

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Description

Explore the essential concepts of acids and bases in food science through these flashcards. Whether you're a student or a food science enthusiast, these definitions will help you grasp the fundamental terms related to matter, acids, and their properties.

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