REACTIONS OF IONS IN AQUEOUS SOLUTIONS.

Question 1

WHEN ARE METAL-AQUA COMPLEXES FORMED

Answer 1

WHEN WE ADD A TRANSITION METAL COMPOUND TO WATER

Question 2

WHEN ARE METAL AQUA IONS ACIDIC AND WHAT HAS AN EFFECT ON HOW ACIDIC IT IS

Answer 2

METAL-AQUA IONS ARE ACIDIC WHEN IN SOLUTION. THE CHARGE OF THE ION HAS AN AFFECT ON HOW ACIDIC IT IS.

Question 3

when [fe(h20)6]2+ reacts with water what type of reaction is this and what happens, what makes the solution acidic , mention how strongly 2+ ions dissociate.

Answer 3

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Question 4

why are 3+ ion metal complexes more acidic than 2+ ion metal complexes

Answer 4

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Question 5

how do u make insoluble metal hydroxides (neutral complex) from metal-aqua ions (3+ ion), and show it (with 2 + theres 2 steps instead of 3 for it to form a solid ppt neutral complex)

Answer 5

hydrolyse further using oh- ions (base)
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Question 6

when a complex is neutral (no charge), what state is it

Answer 6

a solid

Question 7

metal hydroxides are amphoteric. what does that mean

Answer 7

they can act as an acid or a base

Question 8

show why aluminium hydroxide (al(h2o)3(oh)3] is amphoteric and give the equations for it when it reacts with an acid and base separately.

Answer 8

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Question 9

if u add ammonia to metal-aqua ions what forms? and what could happen if u add excess amonnia

Answer 9

metal hydroxide precipitates too. sometimes adding excess ammonia leads to ligand exhange reactons.

Question 10

as the reaction nh3 +h2o —-> nh4+ + oh-, produces oh- ions, adding small quanities of ammonia to a metal-aqua ion produces what?

Answer 10

the same metal hydroxides as what you would get by adding a base (oh-ions)

Question 11

with some metal hydroxides when we add excess amonnia solution we get what type of sub

Answer 11

partial ligand substitution.

Question 12

for exampe with cu(oh)2(h2o)4 when excess ammonia is added some ligands are displaced, and a charge soluble complex is formed. give the equation for this

Answer 12

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Question 13

adding metal carbonates to 2+ metal-aqua ions forms what? and give the equation and state ligand is completely substituted.

Answer 13

insoluble metal carbonate ppts
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Question 14

explain what happens when adding sodium carbonate to 3+ complex ions. and give the equation.

Answer 14

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Question 15

when using ammonia it gives offf pungent fumes, so it should be used/conducted in ….

Answer 15

a fume cupboard.

Question 16

test tube reactions. for metal ions: al3+, cu2+, fe2+ and fe3+. for each show what haoppens when u add, aq solution, oh-,excess oh-, nh3, excess nh3 and sodium carbonate. show the colours of every single complex formed when they react. give thte safety precautions.

Answer 16

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