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Chemistry /Sulphur and Sulphuric Acid Processes

Sulphur and Sulphuric Acid Processes

Chemistry10 CardsCreated about 2 months ago

This deck covers the formation, properties, and uses of sulphur dioxide and sulphuric acid, including the industrial Contact Process for manufacturing sulphuric acid.

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How is sulphur dioxide formed?

Sulphur dioxide is formed by the combustion of sulphur and fossil fuels.

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Key Terms

Term

Definition

How is sulphur dioxide formed?

Sulphur dioxide is formed by the combustion of sulphur and fossil fuels.

What is the laboratory method for preparing sulphur dioxide?

Sulphur dioxide is prepared by the action of warm dilute acids on sulphites, collected by downward delivery.

What are the physical properties of sulphur dioxide?

Sulphur dioxide is a colorless gas with a choking odor, boiling point of -10°C, and is heavier than air.

What are the chemical properties of sulphur dioxide?

Sulphur dioxide is very toxic by inhalation, reacts with water, acts on indicators, and is a reducing agent.

List some uses of sulphur dioxide.

Sulphur dioxide is used as a food preservative, in bleaching wood pulp, and in the manufacture of sulphuric acid.

What is the Contact Process?

The Contact Process is an industrial method to manufacture sulphuric acid, involving the conversion of sulphur dioxide to sulphur trioxide and then to...

How is sulphur dioxide converted to sulphur trioxide in the Contact Process?

Sulphur dioxide is mixed with excess oxygen and passed over a vanadium(V) oxide catalyst at about 450°C.

Why can't sulphur trioxide be directly converted to sulphuric acid with water?

Direct conversion creates a fog of sulphuric acid, so sulphur trioxide is first dissolved in concentrated sulphuric acid to form oleum.

What are the uses of sulphuric acid?

Sulphuric acid is used in explosives, as a drying agent, and in the making of soaps and fertilizers.

What are the conditions for the Contact Process?

The Contact Process uses a vanadium(V) oxide catalyst, a temperature of about 450°C, and moderate pressure.

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Sulphur and Sulphuric Acid Processes

Term	Definition
How is sulphur dioxide formed?	Sulphur dioxide is formed by the combustion of sulphur and fossil fuels.
What is the laboratory method for preparing sulphur dioxide?	Sulphur dioxide is prepared by the action of warm dilute acids on sulphites, collected by downward delivery.
What are the physical properties of sulphur dioxide?	Sulphur dioxide is a colorless gas with a choking odor, boiling point of -10°C, and is heavier than air.
What are the chemical properties of sulphur dioxide?	Sulphur dioxide is very toxic by inhalation, reacts with water, acts on indicators, and is a reducing agent.
List some uses of sulphur dioxide.	Sulphur dioxide is used as a food preservative, in bleaching wood pulp, and in the manufacture of sulphuric acid.
What is the Contact Process?	The Contact Process is an industrial method to manufacture sulphuric acid, involving the conversion of sulphur dioxide to sulphur trioxide and then to sulphuric acid.
How is sulphur dioxide converted to sulphur trioxide in the Contact Process?	Sulphur dioxide is mixed with excess oxygen and passed over a vanadium(V) oxide catalyst at about 450°C.
Why can't sulphur trioxide be directly converted to sulphuric acid with water?	Direct conversion creates a fog of sulphuric acid, so sulphur trioxide is first dissolved in concentrated sulphuric acid to form oleum.
What are the uses of sulphuric acid?	Sulphuric acid is used in explosives, as a drying agent, and in the making of soaps and fertilizers.
What are the conditions for the Contact Process?	The Contact Process uses a vanadium(V) oxide catalyst, a temperature of about 450°C, and moderate pressure.