Science : Ch 02 – Acids Bases and Salts

The increasing order of acid strength is water < acetic acid < hydrochloride acid. Hydrochloride acid is a strong acid and ionises fully in water.

Clove oil is an olfactory indicator. These the substances which give one type of odour in acidic medium and a diferent odour in basic medium so a visually challenged student favours to use clove oil as an acid-base indicator.

Acids turn blue litmus solution to red. They have a sour taste as in the case of vinegar and are sticky to touch. On the other hand, bases turn red litmus solution to blue. Bases are bitter in taste as in the case of baking soda and are slippery to touch.

Lime (CaO) is the base that reacts with a dilute acid such as HCl to form a salt called calcium chloride.

C₂H₅OH is not a base. C₂H₅OH is an organic compound with –OH functional group that is known as alcohol

Common salt (NaCl) is formed after a reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)

On a pH scale acidity ranges from 1 to 7 and it increases by moving down from 7 to 1 while basicity ranges from 7 to 14 which increases by moving up from 7 to 14.