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TOPIC: Acids and Bases



QUESTION 1

Differentiate between an acid and a base and give an example of each. (4 marks)



QUESTION 2

Below are some substances:

Soap, betel nut, orange fruit, lime, bleach, yoghurt



Place the above substances into the table correctly under Acids or Bases. (3 marks)



QUESTION 3

Write the correct word in the space. (1 mark)

When an acid reacts with a base, there is _________.



QUESTION 4

When calcium, being a base, reacts with nitric acid, a salt and water are formed. (1 mark)

What is the name of the salt?



QUESTION 5

Laboratory acids are dangerous and will _________ your skin and even clothes. (1 mark)



QUESTION 6

Name four acids found in food or drink. (4 marks)

A
B
C
D



QUESTION 7

The red solution from hibiscus flowers can be used as an indicator to test substances for being acidic or basic. (2 marks)

What would be the color of the indicator for:

AAcid:
BBase:



QUESTION 8

When a bee stings or an insect bites someone, it is painful and may swell. To treat this, apply body lotion; the pain fades and the swelling goes down. Explain the science of bee stings and applying lotion for the pain to stop. (4 marks)

Verified Answer :

Final answer:

Four acids commonly found in food and drinks include citric acid, acetic acid, lactic acid, and tartaric acid. Acids are proton donors and Bases are proton acceptors, and indicators like hibiscus flowers can be used to test for acidity or basicity. Understanding these concepts helps identify substances in cooking and chemistry.


Explanation:

Name Four Acids Found in Food or Drink

1. Citric Acid: Found in citrus fruits like oranges and lemons, citric acid is commonly used to add sourness to foods and beverages.

2. Acetic Acid: This acid is found in vinegar and gives it its sour taste. It is used in various culinary applications.

3. Lactic Acid: Present in fermented foods like yogurt, lactic acid is responsible for the tangy flavor in various dairy products.

4. Tartaric Acid: Found in grapes and used in baking powders, tartaric acid is important in the winemaking process.

Differences Between Acids and Bases

Acids are substances that donate protons (H+) in a solution, usually having a sour taste and turning litmus paper red. An example of an acid is citric acid.

Bases are substances that accept protons or donate hydroxide ions (OH-) in a solution, generally having a bitter taste and turning litmus paper blue. An example of a base is sodium bicarbonate (baking soda).

Indicators for Acids and Bases

When using hibiscus flowers as an indicator:

  • Acid: The solution will appear red.
  • Base: The solution will turn green or yellow.

Learn more about Acids and Bases here:

https://brainly.com/question/31907617


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