Class 10 Chemistry simulations · Acids, Bases and Salts

Neutralisation: acid + base → salt + water

Add sodium hydroxide from a burette to 25 mL of hydrochloric acid with phenolphthalein, and follow the pH.

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What to notice

The pH rises slowly, jumps sharply near 25 mL (neutral point) and the solution turns pink once it is basic.

Key relation

HCl + NaOH → NaCl + H₂O

Try this

Find the exact volume of NaOH at which the pink colour first appears.

What you can change

• NaOH added: 0 to 50 mL

More in Acids, Bases and Salts

• Buffer solutions (Henderson equation)
• pH of acids and bases
• Acid–base indicators

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