Chemistry
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An acid is a compound which when dissolved in water forms hydronium ions as the only …………… ions. A base is a compound which is soluble in water contains …………… ions. A base reacts with an acid to form a …………… and water only. This type of reaction is known as …………….
Acids Bases Salts
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Answer
An acid is a compound which when dissolved in water forms hydronium ions as the only positively charged ions. A base is a compound which is soluble in water and contains O2- ions. A base reacts with an acid to form a salt and water only. This type of reaction is known as neutralisation.
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Related Questions
The following is a list of methods for the preparation of salts:
A — direct combination of two elements
B — reaction of a dilute acid with a metal
C — reaction of a dilute acid with an insoluble base
D — titration of a dilute acid with a solution of soluble base.
E — reaction of two solutions of salts to form a precipitate.
Choose from the list A to E, the best method of preparing the following salts by giving a suitable equation in each case:
- Anhydrous ferric chloride
- Lead chloride
- Sodium sulphate
- Copper sulphate
Name:
(a) a chloride which is insoluble in cold water but dissolves in hot water,
(b) a chloride which is insoluble
(c) two sulphates which are insoluble
(d) a basic salt,
(e) an acidic salt,
(f) a mixed salt,
(g) a complex salt,
(h) a double salt.
What would you observe when:
(a) blue litmus is introduced into a solution of hydrogen chloride gas.
(b) red litmus paper is introduced into a solution of ammonia in water,
(c) red litmus paper is introduced in caustic soda solution?
Explain why :
(a) it is necessary to find out the ratio of reactants required in the preparation of sodium sulphate,
(b) fused calcium chloride is used in the preparation of FeCl3
(c) Anhydrous FeCl3 cannot be prepared by heating hydrated Iron (III) chloride.