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Physical Chemistry and Inorganic > 2.3 Halogens > Flashcards

2.3 Halogens Flashcards

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1
Q

What is the affect of adding AgNO3- to F-

A

No precipitate as silver fluoride is soluble

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2
Q

What is the affect and equation of adding AgNO3- to Cl-?

A

White Precipitate
Ag+ + Cl- —> AgCl (s)

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3
Q

What is the action of dilute NH3 on AgCl and what is the equation?

A

Solid precipitate dissolves
AgCl + 2NH3 >< [Ag(NH3)2]+ + Cl-

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4
Q

What is the action of AgNO3- on Br- and what is the equation?

A

Cream precipitate
Ag+ + Br- —> AgBr (s)

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5
Q

What is the effect of dilute NH3 on AgBr?

A

No effect

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6
Q

What is the effect of concentrated NH3 on AgBr?

A

Solid precipitate dissolves

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7
Q

What is the effect of AgNO3 on I-?

A

Yellow precipitate

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8
Q

What effects does NH3 have on AgI?

A

None

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9
Q

What are the features of fluorine ?

A

Yellow gas
Very reactive
Toxic

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10
Q

What are the features of chlorine?

A

Green gas
Still quite reactive
Very toxic

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11
Q

What are the features of bromine?

A

Brown liquid
Easily forms orange vapour

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12
Q

What are the features of iodine?

A

Grey crystalline solid
Forms purple Vapour (sublimates)

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13
Q

What is the equation for chlorine in water?

A

Cl2 +H2O >< HCl + HClO
HClO = Chloric 1 acid

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14
Q

What is the equation for chlorine in water left in sunshine?

A

2Cl2 + H2O —> 4HCl + O2

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15
Q

What is the equation for Cl2 in cold dilute NaOH?

A

Cl2 + 2NaOH —> NaCl + NaClO + H2O

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16
Q

Which Halogen is the best reducing agent and why?

A

Iodine because atoms get larger which increases the shielding and outer electrons are more easily lost

17
Q

Which halogen is the best oxidising agent?

A

Fluorine

18
Q

What are the products and observations of H2SO4 and Cl-?

A

HCl
White Steamy fumes

19
Q

What is produced when NaBr reacts with H2SO4?

A

HBr= White steamy fumes
SO2= Colourless gas
Br2

20
Q

What are the products when NaI + H2SO4?

A
  • HI- White steamy fumes
  • SO2- Colourless gas
  • I2
  • Sulfur- Yellow solid
    -H2S- Choking gas
21
Q

What is disproportionation?

A

When an element oxidises and reduces at the same time
E.g Cl and H2O

Physical Chemistry and Inorganic (20 decks)

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