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Chemistry
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Chemistry
Heat of Reaction (4)
Chemistry
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Heat of Reaction (4)
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Formation of insoluble salts
Insoluble salts are formed by a double decomposition reaction that involves heat change, which is known as heat of precipitation
The thermochemical equation for the formation of barium sulphate, BaSO4 precipitate
The heat of precipitation of barium sulphate, BaSO4
Is -42 kJ mol−1
White precipitate of barium sulphate, BaSO4
Steps to calculate the heat of precipitation of lead(II) sulphate, PbSO4
Step 1: Calculate the number of moles of lead(II) sulphate, PbSO4 precipitate formed
Steps to calculate the heat of precipitation of lead(II) sulphate, PbSO4
Step 2: Calculate the heat change
Steps to calculate the heat of precipitation of lead(II) sulphate, PbSO4
Step 3 : Calculate the heat change for the formation of 1 mole of precipitate
Steps to calculate the heat of precipitation of lead(II) sulphate, PbSO4
Step 4: Write the heat of reaction, ∆H
Definition of heat of displacement
Is the heat change when one mole of a metal is displaced from its salt solution by a more electropositive metal
Steps to calculate the heat of displacement of iron, Fe from its salt solution
Step 1: Write the chemical equation
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Heat of Reaction (4)
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