sci_chem
Salts: Formation and Properties
Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.
Free online summary and notes (ICSE Class 10 Hindi). Read it here, no PDF download needed.
About the author
Chemistry · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)
Summary
The metal from the base and the acid radical from the acid join to form the salt; the H+ and OH- make water. NaOH + HCl → NaCl + H2O.
Acid + metal gives salt + hydrogen (test: squeaky pop). Acid + carbonate gives salt + water + carbon dioxide (test: limewater turns milky).
For a soluble salt, add excess base/metal/carbonate to acid, filter the excess, then crystallise. For an insoluble salt, mix two solutions so the salt drops out as a solid.
Strong acid + strong base → neutral salt (NaCl). Strong acid + weak base → acidic salt. Weak acid + strong base → basic salt (Na2CO3).
Hard words & meanings
| salt | a compound formed when the hydrogen of an acid is replaced by a metal or ammonium ion |
| neutralisation | the reaction of an acid with a base to form a salt and water |
| base | a substance that neutralises an acid, often a metal oxide or hydroxide |
| acid radical | the negative ion left from an acid, e.g. chloride, sulfate, nitrate |
| precipitate | an insoluble solid that forms when two solutions are mixed |
| soluble | able to dissolve in water |
| spectator ion | an ion present in solution but not taking part in the reaction |
| crystallisation | evaporating a solution slowly so the dissolved salt forms crystals |
Model exam answers, grammar & audio
You have read the summary. The board-ready model answers, grammar notes, one-touch audio and writing practice for this chapter are part of Lipi©.
Sign in to unlockSee it, understand it, hear it read aloud, then write the exam answer with confidence, for a fraction of a tutor cost.