Question

Exercises
A. Answer the following in not more than 20 words.
1. Classify the following substances into acidic and basic substances.
Tomato juice, soap solution, toothpaste, lemon juice, vinegar
2. Name three mineral acids and give their formulae.
3. Define acids.
4. Define bases.
5. What are soluble bases called? Give two examples.
6. Define neutral substances.​

Answer 1

Answer:

1. juice, juice and vinegar are acidic while soap solotion and tooothpaste are basic.

Answer 2

Answer:

1 vinegar ...acid

lemon juice.... acid

soap solution ....basic

toothpaste ....basic

tomato juice..... acid

2 Phosphoric acid: H3PO. ...

Sulfuric acid: H2SO. ...

Boric acid: H3BO. ...

3 An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.

4 Soluble bases are called alkalis. They have a slippery, soapy feel and form solutions with pH values greater than 7. Common examples include sodium hydroxide, magnesium hydroxide, sodium hydrogen carbonate (sodium bicarbonate), sodium hypochlorite and ammonia.Oct

Neutral substance is a substance that shows no acid or base properties, has an equal number of hydrogen and hydroxyl ions and does not change the colour of litmus-paper.

5 Soluble bases are called alkalis. They have a slippery, soapy feel and form solutions with pH values greater than 7. Common examples include sodium hydroxide, magnesium hydroxide, sodium hydrogen carbonate (sodium bicarbonate), sodium hypochlorite and ammonia.Oct

6 Neutral substance is a substance that shows no acid or base properties, has an equal number of hydrogen and hydroxyl ions and does not change the colour of litmus-paper.