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GCSE chemistry > Chemical Tests > Flashcards

Chemical Tests Flashcards

1
Q

Why must litmus paper be dampened before use with ammonia gas?

A

because ammonia gas reacts with the water on the litmus paper to form ammonium hydroxide and litmus paper turns blue in the presence of hydroxide ions.

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2
Q

What is the example equation for copper (sulphate) and sodium hydroxide reacting?

A

Copper (sulphate) + sodium hydroxide-> copper hydroxide + sodium (sulphate)

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3
Q

What is the example equation for ammonium (chloride) + sodium hydroxide reacting?

A

Ammonium (chloride) + sodium hydroxide -> sodium chloride + ammonia + water

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4
Q

What is the example equation for zinc carbonate and nitric acid reacting?

A

Zinc carbonate + nitric acid -> zinc nitrate + carbon dioxide + water

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5
Q

What is the example equation for barium chloride and sodium sulphate reacting?

A

Barium chloride + sodium sulphate -> sodium chloride + barium sulphate

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6
Q

What is the example equation for silver nitrate and sodium bromide reacting?

A

Silver nitrate + sodium bromide -> sodium nitrate + silver bromide

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7
Q

What happens when carbon dioxide and limewater react?

A

a white precipitate of calcium carbonate forms

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GCSE chemistry (9 decks)

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