Chemistry revision

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  • Created by: jonesssx
  • Created on: 21-12-16 09:34
Define the terms: Acid, alkali and salt.
An acid is a compound, which releases hydronium ions (H3O+) as the only positive ions in solution. An alkali is a compound, which releases hydroxyl ions (OH-) as the only negative ions in solution. A salt is one of the products of neutraliz
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Identify the number of replaceable hydrogen ions (H+) in the following acids: HCl, CH3COOH, H2SO4, H3PO4.
HCl = 1 CH3COOH = 1 H2SO4 = 2 H3PO4 = 3.
2 of 10
What is a neutralization reaction?
Neutralization is essentially a chemical reaction between H3O+ ions of an acid with OH- ions of the base, to give undissociated molecules of water.
3 of 10
Why is acetic acid called a weak acid though there are 4 'H' atoms in the molecule?
Acetic acid is called a monobasic acid because only one of the 4 'H' atoms of the acid is released as H+ ion in solution.
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What are strong and weak acids? Give one example of each?
A strong acid is one, which is almost completely dissociated in solution. Examples: Dilute nitric acid, dilute sulphuric acid and dilute hydrochloric acid. A weak acid is one, which is only partially ionized in solution (degree of dissociation is >30
5 of 10
How does a strong acid differ from a concentrated acid?
The strength of an acid depends upon its dissociation power whereas concentration depends on water content in the acid.
6 of 10
Name a salt of a strong acid HNO3 and a weak base like NH4OH. Represent the reaction that takes place.
The salt that results due to the above reaction is Ammonium nitrate (NH4NO3). The reaction is represented as: HNO3 + NH4OH --------> NH4NO3
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1) Name a strong base and a weak base. 2) Name a hydrated salt.
1) A strong base is sodium hydroxide (NaOH) and a weak base is ammonium hydroxide (NH4OH). 2) A hydrated salt is copper sulphate crystals (CuSO4.5H2O).
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Name the following: 1) Two non-hydrated crystalline salts 2) Two neutral salts 3) Two basic salts 4) Two acid salts
1) Two non-hydrated crystalline salts are: sodium chloride (NaCl) and potassium nitrate (KnO3) 2) Two neutral salts are: sodium chloride (NaCl) and sodium sulphate (Na2SO4) 3) Two basic salts are: basic copper carbonate (CuCO3.Cu(OH)2) and basic le
9 of 10
Name the salts of sulphuric acid.
The salts of sulphuric acid are bisulphate and sulphate. Examples: NaHSO4, KHSO4 and Na2SO4.
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Other cards in this set

Card 2

Front

Identify the number of replaceable hydrogen ions (H+) in the following acids: HCl, CH3COOH, H2SO4, H3PO4.

Back

HCl = 1 CH3COOH = 1 H2SO4 = 2 H3PO4 = 3.

Card 3

Front

What is a neutralization reaction?

Back

Preview of the front of card 3

Card 4

Front

Why is acetic acid called a weak acid though there are 4 'H' atoms in the molecule?

Back

Preview of the front of card 4

Card 5

Front

What are strong and weak acids? Give one example of each?

Back

Preview of the front of card 5
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