Science : Ch 02 – Acids Bases and Salts

Calcium phosphate Ca₃(PO₄)₂  is a basic salt, as it is formed by the combination of a weak acid (phosphoric acid) and a slightly stronger base (calcium hydroxide)

Baking soda’s formula does not show any relationship water molecules.

washing the hands with water will dilute the acid and wash it out. Any remaining acid will be neutralized with sodium hydrogen carbonate (baking soda) as it is a base. This will minimize the effect of damage caused by acid to the skin.

If 10 ml of H₂SO₄ is mixed with 10 ml of Mg(OH)₂ of the same concentration, the result solution be MgSO₄ which is a neutral salt and universal indicator will give the green colour in this solution

Baking powder is a mixture of sodium hydrogen carbonate and tartaric acid NaHCO₃ + H+ → CO₂ + H₂O + Sodium salt (from tartaric acid) of acid Carbon dioxide (CO₂) produced during reaction can cause bread or cake to rise and makes Baking powder, tartaric acid neutralises the salt and cake does not taste bitter.

The tooth paste commonly used is alkaline or basic in nature as they contain mild bases such as sodium fuoride or sodium bicarbonate in their composition.

Sodium carbonate (Na₂CO₃) is the salt of carbonic acid (H₂CO₂) and sodium hydroxide (NaOH). Here NaOH is a powerful base and carbonic acid is a weak acid.