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Chem1110 > midterm > Flashcards

midterm Flashcards

(61 cards)

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1
Q

Tera (T)

A

10^12

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2
Q

Giga (G)

A

10^9

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3
Q

Mega (M)

A

10^6

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4
Q

Kilo (k)

A

10^3

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5
Q

Deci (d)

A

10^-1

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6
Q

Centi (c)

A

10^-2

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7
Q

Milli (m)

A

10^-3

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8
Q

Micro (µ)

A

10^-6

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9
Q

Nano (n)

A

10^-9

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10
Q

pico (p)

A

10^-12

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11
Q

how many sig figs to use when multiplying

A

lowest number in problem

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12
Q

how many sig figs to use when adding or subtracting

A

lowest number after decimal place

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13
Q

how many decimals to use with a balance

A

3 decimal places

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14
Q

how many decimal places to use with a ruler

A

2 decimal places

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15
Q

how many decimal places to use with a graduated cylinder

A

1 decimal place

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16
Q

volume equation for a cylinder

A

V=πr^2(h)

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17
Q

volume equation for a cube

A

V=s^3
s= length of a side

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18
Q

density equation

A

D=m/v

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19
Q

reaction 1: copper and nitric acid (HNO3)
what kind of reaction, what does it make

A
  1. oxidation reaction
  2. Cu(NO3)2 or copper (II) nitrate
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20
Q

reaction 2: copper (II) nitrate with sodium hydroxide (NaOH)
what kind of reaction, what does it make

A
  1. double displacement
  2. Cu(OH)2 or copper (II) hydroxide
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21
Q

reaction 3: copper (II) hydroxide with heat
what kind of reaction, what does it make

A
  1. decomposition reaction
  2. CuO and copper (II) oxide
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22
Q

what did you do before reaction 4 (part B)

A

filter CuO from water with a Buchner funnel

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23
Q

reaction 4: copper (II) oxide with sulfuric acid (H2SO4)
what kind of reaction, what does it make

A
  1. double displacement
  2. copper (II) sulfate or CuSO4
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24
Q

reaction 5: copper (II) sulfate with zinc
what kind of reaction, what does it make

A
  1. single displacement
  2. Cu
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25
% recovery formula
(copper final/ cu initial)x100
26
what is a hydrate
a compound that contains a precise composition of water
27
what happens when you heat a hydrate? what is the process called?
the water is removed by evaporation effloresence
28
hydrate formula
Z*nH2O Z= ionic compound n= number of water molecules per unit
29
efflorescence equation
Z*nH2O -> Z+nH2O
30
anhydrous salt? how is it created in lab?
a salt that does not contain water molecules created by heating a hydrate
31
weight % of water in a hydrate formula
(weight of water/weight of hydrate)x100
32
moles of water calculation hint: g-> mol
mass of water(g)x(1 mol H2O/18.01 g H2O) *18.01= 1 mol water
33
formula weight of an anhydrous salt (molar mass) ex: CuCl2
63.55 g/mol+(2) 35.46 g/mol= 134.45 g/mol
34
2 calculations for weight of an anhydrous salt
1. weight of anhydrous salt (after heating) & weight of crucible - weight of crucible 2. weight of hydrate- weight of water
35
moles of anhydrous salt formula hint: g-> mol
mass of A.S. x (1 mol/ molar mass A.S.)
36
ratio of mols of water to mols anhydrous salt formula
n= (mols of water/ mols of A.S)
37
mols of water lost equation
mass of hydrate- mass of A.S.
38
what hybridization does linear electron geometry give
sp
39
what hybridization does trigonal planar electron geometry give
sp2
40
what hybridization does tetrahedral electron geometry give
sp3
41
what hybridization does trigonal bipyramidal electron geometry give
sp3d
42
what hybridization does octahedral electron geometry give
sp3d2
43
is a symmetrical (2 types of atoms) molecule polar or nonpolar
nonpolar
44
is an asymmetrical (3+ types of atoms) molecule polar or nonpolar
polar
45
are symmetrical atoms polar or nonpolar
nonpolar
46
are molecules of the same element (H2, O2) polar or nonpolar
nonpolar
47
are hydrocarbons (CH4) polar or nonpolar
nonpolar
48
solubility of copper (II) nitrate Cu(NO3)2
yes
49
solubility of copper (II) hydroxide Cu(OH)2
no
50
solubility of copper (II) oxide CuO
no
51
solubility of copper (II) sulfate CuSO4
yes
52
state of matter of copper (II) nitrate Cu(NO3)2
aqueous
53
state of matter of copper (II) hydroxide Cu(OH)2
solid
54
state of matter of copper (II) oxide CuO
solid
55
state of matter of copper (II) sulfate CuSO4
aqueous
56
what are the hazards of the copper labs (5)
NO2 sulfuric acid (H2SO4) hydrochloric acid (HCl) nitric acid (HNO3) sodium hydroxide (NaOH)
57
linear electron geometry bond angle
180
58
trigonal planar electron geometry bond angle
120
59
tetrahedral electron geometry bond angle
109.5
60
trigonal bipyramidal electron geometry bond angle
120, 90
61
octahedral electron geometry bond angle
90

Chem1110 (6 decks)

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