Common Acids and Alkalis Quiz

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Questions and Answers

Which property is associated with acids rather than alkalis?

  • Can react with grease
  • Have a slippery feel
  • Some have a bitter taste
  • Have a sour taste (correct)

What is the primary function of hydrochloric acid in toilet cleaners?

  • To create foam for better cleaning
  • To provide a slippery surface
  • To add a sweet scent
  • To react with dirt and stains and make them easier to remove. (correct)

Which of the following is a characteristic function of sodium hydroxide?

  • Causes an acidic reaction with fruits
  • Removes grease from kitchen surfaces (correct)
  • Used for food preservation
  • Forms a bitter taste in food

In noodle production, what is the role of lye water?

<p>To enhance the chewiness of noodles (B)</p> Signup and view all the answers

Which statement about the uses of acids and alkalis is accurate?

<p>Acids are commonly used for food preservation. (A)</p> Signup and view all the answers

What gives vinegar its characteristic sour taste?

<p>Acetic acid (A)</p> Signup and view all the answers

Which of the following foods contains alkalis?

<p>Lye water rice dumplings (A)</p> Signup and view all the answers

Which household product is known to contain an alkali?

<p>Bleach (A)</p> Signup and view all the answers

What is a common characteristic of alkalis when touched?

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

Which of the following is NOT a common acid used in laboratories?

<p>Lactic acid (C)</p> Signup and view all the answers

Which type of acid is commonly associated with soft drinks?

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

Why should acids and alkalis, especially household cleaners, be handled with care?

<p>They might have a corrosive nature and be irritant. (A)</p> Signup and view all the answers

What is a typical taste associated with alkalis?

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

What should you do if acids or alkalis splash onto your skin?

<p>Wash the area under slow-running water for at least 10 minutes (A)</p> Signup and view all the answers

Which acid is known for being stored in dark-colored reagent bottles due to its light sensitivity?

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

What is a common use for acids in daily life?

<p>Food preservation (A)</p> Signup and view all the answers

What should be done after handling acids or alkalis in the laboratory?

<p>Wash hands thoroughly (C)</p> Signup and view all the answers

What is a characteristic of most acids and alkalis used in laboratories?

<p>They are irritant or corrosive (A)</p> Signup and view all the answers

Flashcards

Acid

A substance that has a sour taste and is often found in foods and drinks.

Alkali

A substance that has a slippery feel and may have a bitter taste.

Ethanoic acid

A common type of acid found in vinegar.

Hydrochloric acid

A strong acid commonly used in laboratories.

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Sulphuric acid

A strong acid commonly used in laboratories.

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Nitric acid

A strong acid commonly used in laboratories.

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Baking soda

A common alkali found in baking soda.

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Bleach

A common alkali found in bleach.

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Sodium hydroxide

A type of alkali commonly found in lye water and used in the production of noodles to create a chewy texture.

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Why is Nitric Acid stored in dark bottles?

Nitric acid is easily decomposed by light and should be stored in dark-colored bottles to prevent its breakdown.

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Safety Precautions with Acids and Alkalis

Acids and alkalis are commonly used in the laboratory but they can be irritating or corrosive. It is important to handle them with care and follow strict safety precautions.

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Emergency Treatment: Acid/Alkali on Skin

If acids or alkalis splash onto your skin, immediately wash the affected area under slow-running water for at least 10 minutes.

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Emergency Treatment: Acid/Alkali in Eyes

If acids or alkalis splash onto your eyes, immediately wash the affected eye(s) using eye wash bottle for at least 10 minutes.

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Emergency Treatment: Acid/Alkali on Clothes

If acids or alkalis splash onto your clothes, carefully remove the affected clothes and avoid making contact with any acids or alkalis on the clothes.

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Vinegar as a Food Preservative

Vinegar is an example of an acid used for food preservation. It inhibits the growth of microorganisms, preventing food spoilage.

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How do Acids Preserve Food?

Acids are used to preserve food because they prevent the growth of microorganisms that cause food spoilage.

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Uses of Acids and Alkalis

Acids and alkalis have a wide range of uses in everyday life. Some examples include food preservation, cleaning products, and industrial processes.

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Study Notes

Common Acids and Alkalis

  • Acids are substances that taste sour
  • Alkalis are substances that feel slippery and some have a bitter taste
  • Vinegar contains ethanoic acid which gives it a sour taste
  • Many foods and drinks contain acids
  • Some household products contain acids
  • Some household products contain alkalis
  • Chinese noodles and lye water rice dumplings contain alkalis
  • Alkalis can be found in kitchen cleaners, bleach, alkaline batteries, and toothpaste
  • Acids and alkalis are often used in laboratories
  • Common laboratory acids include hydrochloric acid, sulphuric acid, and nitric acid
  • Common laboratory alkalis include sodium hydroxide, ammonia solution, and calcium hydroxide (lime water)
  • Acids and alkalis can be corrosive and should be handled carefully
  • Acids have a sour taste
  • Alkalis have a slippery feel and some have a bitter taste
  • Acids can be used for food preservation
  • Vinegar, commonly used as a food preservative, is an acid
  • Alkalis can also be used for food preservation
  • Lye water can be used in making noodles
  • Hydrochloric acid is found in some toilet cleaners and can remove stains
  • Sodium hydroxide is found in some kitchen cleaners and can remove grease

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