Question

what are bases ? what are their physical properties ? give any two examples of bases or basic compounds which are useful to us .​

Answer 1

Answer:

Bases : The substances which are bitter in nature and turn the red litmus blue are called bases.

Physical properties of base:

1. They are bitter in nature.

2. They are rough.

3. They turn red litmus blue.

4. The reading of base on PH scale is always more than 7.0.

EXAMPLES OF BASES

1. Sodium hydroxide

2.Sodium bicarbonate(baking soda)

Answer 2

Answer:

Bases:

• A base is a substance that can neutralize the acid by reacting with hydrogen ions. Most bases are minerals that react with acids to form water and salts. Bases include the oxides, hydroxides and carbonates of metals. The soluble bases are called alkalis. Sodium hydroxide is an alkali.
• In chemistry, a base is a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution. ... Types of bases include Arrhenius base, Bronsted-Lowry base, and Lewis base. Examples of bases include alkali metal hydroxides, alkaline earth metal hydroxides, and soap.

Physical Properties:

1. Bases taste bitter, feel slippery,
2. It conduct electricity when dissolved in water.
3. Indicator compounds such as litmus can be used to detect bases. Bases turn red litmus paper blue.
4. The strength of bases is measured on the pH scale.
5. Bases lose their basicity when mixed with acids.
6. Bases react with acids to form salt and water

Examples:

1. sodium hydroxide, NaOH (lye or caustic soda) - Used in the manufacture of soaps and detergents and as the main ingredient in oven and drain cleaners.
2. potassium hydroxide, KOH (lye or caustic potash) - Used in the production of liquid soaps and soft soaps. Used in alkaline batteries