Acids and their Sources Quiz
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Questions and Answers

Which of the following best describes the characteristic taste of acids?

  • Bitter
  • Sour (correct)
  • Sweet
  • Salty

What happens when a strong acid is dissolved in water?

  • It releases a few H+ ions
  • It only partially breaks down in water
  • It dissociates completely and gives off many H+ ions (correct)
  • It gives off many OH- ions

What is the Latin meaning of the word 'acidus'?

  • Sweet
  • Sour
  • Bitter
  • Sharp (correct)

What type of acid reacts with metals and carbonates to produce gas?

<p>Strong acid (B)</p> Signup and view all the answers

What is another word for a base?

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

Which characteristic is NOT true for bases?

<p>Contain H+ ions (D)</p> Signup and view all the answers

What is the measure of how acidic or basic a solution is?

<p>pH (D)</p> Signup and view all the answers

Why do bases feel slippery or soapy?

<p>They react with fatty acids in the skin (B)</p> Signup and view all the answers

Which pH value represents a neutral solution?

<p>pH 7 (B)</p> Signup and view all the answers

What is the purpose of an acid-base indicator?

<p>To change color in the presence of an acid or base (B)</p> Signup and view all the answers

Which characteristic is NOT true for litmus?

<p>Is used to measure pH (A)</p> Signup and view all the answers

What happens when an acid and base react with each other?

<p>The characteristic properties of both are destroyed (B)</p> Signup and view all the answers

What is the pH range for edible substances?

<p>$2-8$ (B)</p> Signup and view all the answers

What is the purpose of a universal indicator?

<p>To change color through a wide range of pH values (A)</p> Signup and view all the answers

"pH" stands for which of the following?

<p>&quot;Potential of Hydrogen&quot; (B)</p> Signup and view all the answers

An acid is a substance that releases ______ ions in an aqueous solution

<p>H+</p> Signup and view all the answers

The more ______ ions, the more acidic the solution

<p>H+</p> Signup and view all the answers

A strong acid dissociates completely when in aqueous solution, giving off many ______ ions

<p>H+</p> Signup and view all the answers

Acids react with metals and carbonates to produce ______

<p>gas</p> Signup and view all the answers

A base is a substance that releases ______ ions in an aqueous solution

<p>hydroxide</p> Signup and view all the answers

The more ______ ions, the more basic (or alkaline) the solution

<p>OH-</p> Signup and view all the answers

A solution with a pH of 7 is considered ______.

<p>neutral</p> Signup and view all the answers

Litmus turns ______ in acidic solutions.

<p>red/pink</p> Signup and view all the answers

The compound that separates into sodium ions (Na+) and hydroxide ions (OH-) when dissolved in water is called ______.

<p>sodium hydroxide (NaOH)</p> Signup and view all the answers

An acid-base indicator is a compound that will change color in the presence of an ______ or base.

<p>acid</p> Signup and view all the answers

Bases feel soapy or slippery because they react with acid molecules in the skin called ______ acids.

<p>fatty</p> Signup and view all the answers

The pH scale is a measure of how acidic or basic a solution is, with pH standing for the power of ______ or potential of Hydrogen.

<p>Hydrogen</p> Signup and view all the answers

Everything above 7 on the pH scale is considered a ______.

<p>base</p> Signup and view all the answers

Mixing acids and bases results in the formation of ______.

<p>water</p> Signup and view all the answers

A universal indicator is a mixture of chemicals that changes colors through a wide range of ______ values.

<p>pH</p> Signup and view all the answers

The color of some flowers is dependent upon the ______ of the soil.

<p>pH</p> Signup and view all the answers

Study Notes

Acids and Bases

  • Acids have a characteristic sour taste
  • Strong acids dissociate completely in water, releasing many H+ ions
  • The Latin word 'acidus' means sour
  • Acids react with metals and carbonates to produce gas
  • A base is also known as an alkali
  • Bases do not feel slippery or soapy due to their pH, but due to reacting with skin acid molecules
  • The pH scale measures how acidic or basic a solution is
  • pH 7 represents a neutral solution
  • Acid-base indicators change color in the presence of an acid or base
  • Universal indicators change color through a wide range of pH values

pH Scale

  • pH values below 7 are acidic
  • pH values above 7 are basic or alkaline
  • pH stands for the power of Hydrogen or potential of Hydrogen

Chemical Reactions

  • Acids release H+ ions in an aqueous solution
  • The more H+ ions, the more acidic the solution
  • Bases release OH- ions in an aqueous solution
  • The more OH- ions, the more basic (or alkaline) the solution
  • Acids react with bases to form salts and water
  • Sodium hydroxide (NaOH) is a compound that separates into sodium ions (Na+) and hydroxide ions (OH-) when dissolved in water

Properties and Characteristics

  • Litmus turns red in acidic solutions
  • Bases feel soapy or slippery due to reacting with skin acid molecules
  • Edible substances typically have a pH range of 5.5-8.5
  • The color of some flowers is dependent on the pH of the soil

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Test your knowledge about acids and their sources with this quiz. Learn about the properties of acids and common sources of different types of acids.

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