Introduction to Acids and Their Properties
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Questions and Answers

Acids are generally bitter in taste.

False

What happens to blue litmus paper when it is dipped into an acid?

  • It turns green
  • It remains blue
  • It dissolves
  • It turns red (correct)
  • What common household item is an example of a base?

    Sodium bicarbonate

    Acids liberate __________ when they react with some metals.

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

    Which statement accurately describes the relationship between acids and the terms derived from Latin words?

    <p>The Latin word 'acidus' directly translates to sour.</p> Signup and view all the answers

    Match the following substances with their category:

    <p>HCl = Acid NaOH = Base NaCl = Salt NH3 = Lewis Base</p> Signup and view all the answers

    Which property is NOT characteristic of bases?

    <p>They taste sour.</p> Signup and view all the answers

    What happens to the electrostatic forces between ions when sodium chloride is dissolved in water?

    <p>The forces are reduced due to the dielectric constant of water.</p> Signup and view all the answers

    Which of the following correctly identifies a Lewis acid?

    <p>Silver cation (Ag+)</p> Signup and view all the answers

    What type of reaction occurs between an acid and a base to produce salt?

    <p>Neutralization reaction</p> Signup and view all the answers

    Identify the incorrect statement about salts.

    <p>Salts are exclusively liquid at room temperature.</p> Signup and view all the answers

    What taste is commonly associated with acidic substances?

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

    Which compound is an example of a weak acid commonly found in food?

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

    Which of the following is NOT a function of water as a solvent?

    <p>It increases electrostatic forces among ions.</p> Signup and view all the answers

    What is the effect of a base on blue litmus paper?

    <p>The paper remains blue.</p> Signup and view all the answers

    Study Notes

    Acids

    • Acids exhibit the property of acidity and are characterized by their sour taste.
    • Common acids include hydrochloric acid, citric acid (found in lemons and oranges), ascorbic acid (vitamin C), and tartaric acid (found in tamarind).
    • The term "acid" originates from the Latin word "acidus," meaning sour.
    • Dipping blue litmus paper in acid results in a red coloration, while red litmus paper remains unchanged.
    • Acids can release dihydrogen when reacting with certain metals.

    Bases

    • Bases turn red litmus paper blue, and blue litmus paper remains unchanged.
    • They are known for their bitter taste and a soapy feel.
    • Common bases include sodium bicarbonate (baking soda) and household bleach.

    Salts

    • Salts are formed from the reaction between an acid and a base, with sodium chloride as a primary example.
    • Sodium chloride (common salt) is produced from the reaction of hydrochloric acid with sodium hydroxide.
    • It consists of positively charged sodium ions and negatively charged chloride ions, which are held together by electrostatic forces.
    • Electrostatic forces are inversely proportional to the dielectric constant of the medium in which they exist.
    • Water, as a universal solvent, has a dielectric constant of 80, which reduces electrostatic forces and allows ions to move freely when sodium chloride is dissolved.
    • Hydration of ions with water molecules enhances their separation in solution.

    Lewis Acids and Bases

    • The silver cation (Ag⁺) acts as a Lewis acid due to its ability to accept electron pairs.
    • Ammonia (NH₃) functions as a Lewis base because it can donate an electron pair.

    Acids

    • Acids exhibit the property of acidity and are characterized by their sour taste.
    • Common acids include hydrochloric acid, citric acid (found in lemons and oranges), ascorbic acid (vitamin C), and tartaric acid (found in tamarind).
    • The term "acid" originates from the Latin word "acidus," meaning sour.
    • Dipping blue litmus paper in acid results in a red coloration, while red litmus paper remains unchanged.
    • Acids can release dihydrogen when reacting with certain metals.

    Bases

    • Bases turn red litmus paper blue, and blue litmus paper remains unchanged.
    • They are known for their bitter taste and a soapy feel.
    • Common bases include sodium bicarbonate (baking soda) and household bleach.

    Salts

    • Salts are formed from the reaction between an acid and a base, with sodium chloride as a primary example.
    • Sodium chloride (common salt) is produced from the reaction of hydrochloric acid with sodium hydroxide.
    • It consists of positively charged sodium ions and negatively charged chloride ions, which are held together by electrostatic forces.
    • Electrostatic forces are inversely proportional to the dielectric constant of the medium in which they exist.
    • Water, as a universal solvent, has a dielectric constant of 80, which reduces electrostatic forces and allows ions to move freely when sodium chloride is dissolved.
    • Hydration of ions with water molecules enhances their separation in solution.

    Lewis Acids and Bases

    • The silver cation (Ag⁺) acts as a Lewis acid due to its ability to accept electron pairs.
    • Ammonia (NH₃) functions as a Lewis base because it can donate an electron pair.

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    Description

    Explore the fascinating world of acids and their characteristic sour taste. This quiz covers various types of acids found in everyday life, such as citric, ascorbic, and tartaric acids. Additionally, learn about the interaction of acids with litmus paper to understand their chemical properties.

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