Question

what is acid? write its physical and chemical properities​

Answer 1

Answer:

An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some acids burn or dissolve other substances that they come into contact with.

Chemical properties of Acids:

• Acids change the colour of litmus from blue to red.

• They convert the colour of Methyl Orange from Orange/Yellow to Pink.

• Acids turn the pink colour of Phenolphthalein to colourless.
• Acids can conduct electricity.

• Some Acids are highly corrosive in nature which means that they corrode or rust metals.

• Acids tend to evolve hydrogen gas whilst reacting with an active metal such as Zn, Mg, etc.

Physical properties of Acids:

• Acids have a sour taste

• Acid solutions have pH values less than 7. (More about pH values in the next few sub-topics)

• Acid solutions turn blue litmus paper (an indicator) red.

• The sour taste found in lemon juice is due to citric acid.

• Vinegar is sour because it contains ethanoic acid.

• Sour milk contains lactic acid.

Hope it helps!!!!