17B.4 Flashcards

1
Q

What is the colour of Hexaaquamanganese(II)

A

pale pink, but when dilute will most likely appear colourless

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2
Q

what is the colour of tetraaquadihydroxomanganese(ii) complex

A

a white precipitate that might not be seen as the precipitate rapidly turns pale brown so the final result will be pale brown

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3
Q

what are the reaction, reaction type, and colour change with aq NaOH is added to a solution containing

A

page 207

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4
Q

what happens to the pale brown colour o tetraaquadihydroxomanganese(ii) complex when left in air

A

it will turn dark brown as it is oxidized to form [Mn(H2O)3(OH)3]^-, then it will turn very dark brown forming hydrated manganese(IV) oxide MnO2.xH2O

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5
Q

tetraaquadihydroxomanganese(ii) doesnt dissolve in

A

excess NaOH

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6
Q

what is the reaction, reaction type, colour change when aq ammonia is added to hexaaquamanganese(ii) complex

A

page 207

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7
Q

why is the end colour of the reactions between Hexaaquamanganese(ii) and NH3 AND NaOH (both aq) a brown precipitate and nit white

A

even though the tetraaquadihydroxomanganese(ii) complex is white it will rapidly change to brown so like slay

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