Introduere in studiul chim Flashcards

1
Q

uree

A

NH4Cl + AgNCO -> NH4NCO + AgCl

NH4NCO la temp -> (NH2)2CO = uree-reziduu alb cristalin

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2
Q

C

C-H

A
tetravalent, exceptie CO
for leg covalente
1s2 2s2 2p2
config stabila de octet
leg cov identice, tetraedru regulat
unghiul C-H=C-C=109,28
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3
Q

leg sigma

A

intrep/ suprap totala a 2 orbitali coaxiali

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4
Q

leg pi

A

intrep partiala a 2 orbitali p paraleli

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5
Q

leg dubla

A

leg pi e perpendiculara pe sigma

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6
Q

formula bruta

A

nat atomilor si rap lor, exprimat in nr intregi

se stab cunoscand comp subst si masele atomice

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7
Q

for molec

A

felul atomilor si nr exact al acestora
e un multiplu intreg al for brute
o for bruta are mai mute for molec

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8
Q

electrovalenta

A

A mai electroneg ca B
F1 > F2
B cedeaza electron -> ion pozitiv

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9
Q

leg covalenta

A

F1 comparabil cu F2
F1=F2 - neploara
F1 dif F2 - polara

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10
Q

lung legaturii scade

A

forte de atractie mari det dist mici si invers

leg tripla < dubla < simpla

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