When a few drops of phenolphthalein are added to a dilute solution of sodium hydroxide, a pink colour is produced. What will be the colour of the final mixture when excess of HCl is added to it?
When excess of HCl is added, the colour of the final mixture will be colourless because the pink colour of sodium hydroxide is neutralised with the acid.
When reactive metals react with dilute hydrochloric acids, gives a salt and hydrogen gas
Metal + Dilute acid → Salt + Hydrogen
Reaction between Iron and H2SO4:
Fe + H2SO4 → FeSO4 +...
(i) Sodium carbonate :for softening of hard water ,laboratory reagent.
(ii) Sodium hydroxide: in the manufacture of soap, in the purification of bauxite.
(iii) Sodium hydrogen carbonate: as a mild antiseptic, as...
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