what are the charactersic of acid and base in present of metal?
Answers
Answer:
As you read earlier, acids in foods taste sour and produce a burning or prickling ... Acids also react with most metals
Answer:
Acids: The word ‘Acid’ came from Latin word ‘Acidus or Acere’ which means sour.
Sour taste is the most common characteristic of acid. Acid turns blue litmus paper red. There are many substances which contain acid and hence taste sour, such as curd, tamarind, lemon, etc.
Types of Acids: Acids are divided into two types on the basis of their occurrence – Natural acids and Mineral acids.
Natural Acid: Acids which are obtained from natural sources are called natural acid or organic acid.
Mineral Acids: Acids that prepare from mineral are known as mineral acids, inorganic acids, man-made acids or synthetic acid, such as hydrochloric acid, sulphuric acid, nitric acid, etc.
What are bases?
Sodium hydroxide (NaOH) is a strong alkali. Its pH is much higher than 7. So, it turns red litmus to blue.
NaOH reacts with zinc to form sodium zincate and hydrogen.
Phenolphthalein is an indicator. In alkaline solution it gives pink colour, whereas it becomes colourless in acidic medium. So, NaOH gives pink colour with phenolphthalein.