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Elements of the sea > ES- Hydrogen Halides > Flashcards

ES- Hydrogen Halides Flashcards

1
Q

What is produced when making HCl with NaCl + c . H2SO4?

A

HCl only as a gas

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2
Q

What do we use to make the hydrogen halides?

A

Conc H2SO4
Sulphuric acid

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3
Q

What you’ll you see when making HCl?

A

Fizzing and white misty fumes

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4
Q

Is it suitable to make HCl with c. H2SO4?

A

Yes as only HCl is formed

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5
Q

What is produced when making HBr with NaBr+ c . H2SO4?

A

HBr+ So2 + Br2

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6
Q

What you’ll you see when making HBr?

A

Fizzing + white misty fumes + orange/ brown bromine vapour.

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7
Q

Is it suitable to make HBr with c. H2SO4?

A

No as there is a motive of gases

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8
Q

What is produced when making HI with NaI+ c . H2SO4?

A

HI + H2S +I2 vapour

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9
Q

What you’ll you see when making HI ?

A

Fizzing + white misty fumes + purple vapour + egg smell

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10
Q

Is it suitable to make HI with c. H2SO4?

A

No as there is a mix of gasses

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11
Q

What do we use instead of c. H2SO4 to make pure hydrogen halides?

A

Phosphoric acid

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12
Q

Why can we not use a test tube suspended in water to capture hydrogen halides?

A

hydrogen halides are very solvable in water so will produce an acid when they react.

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13
Q

How do we capture hydrogen halides?

A

Downward delivery or gas syringe

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14
Q

What bonding is used in hydrogen halides?

A

Covalent

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15
Q

How do the hydrogen halides react when water is added?

A

They all react to make an acidic solution

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16
Q

How do hydrogen halides react when NH3 is added?

A

They produce NH4x and a white smoke.
E.g. HF + NH3 —> NH4F

17
Q

How do hydrogen halides react when they are heated?

A

HCl + HF do not react due to strong bonds

but HBr and HI decomposes back to its elements H2 + x2

with purple vapour for HI
and HBr produces orange vapour

18
Q

How do hydrogen halides react when conc sulfuric acid is added?

A

HF + HCl have no reaction

HBr reacts to br2 + so2

Hi reacts to I2 + H2S

Elements of the sea (1 decks)

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