Question

29.write two-two properties of acid and base.​

Answer 1

Answer:

Property Acid Base

Taste Sour (vinegar) Bitter (baking soda)

Smell Frequently burns nose Usually no smell (except NH3!)

Texture Sticky Slippery

Reactivity Frequently react with metals to form H2 React with many oils and fats

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Answer 2

Properties of Acids

Answer

• The term ‘acid’ has been derived from the Latin word, 'acidus' which means sour.

• Acids have sour taste.

• They turn blue litmus solution red.

• They give H+ ions in aqueous solution.

Strong Acids: HCl, H2 SO4 , HNO3

Weak Acids: CH3COOH, Oxalic acid, Lactic acid

Concentrated Acids: More amount of acid + Less amount of water

Dilute Acids: More amount of water + Less amount of acid

Properties of Bases

Answer

• These are the substances which are bitter in taste and soapy in touch.

• They turn red litmus solution blue.

• They give OH- ions in aqueous solution.

Strong Bases: NaOH, KOH, Ca(OH)2

Weak Bases: NH4OH

Alkalies: These are bases which are soluble in water. Examples: NaOH, KOH, Ca(OH)2.