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Anhydrous
Sodium Sulphate removes water
1 of 50
Why do molecules absorb infrared of specific frequencies?
They need a specific frequency to make them vibrate
2 of 50
Production of Ozone Equation
3O2 -----> 2O3
3 of 50
Which element is the more reactive in an ionic equation?
the one that becomes an ion
4 of 50
cm3 to dm3
x1000
5 of 50
N=CV units of N
dm3
6 of 50
Chlorine uses
making PVC and treating water
7 of 50
Why do permanent dipoles occur when referring to shape?
when the charges aren't symmetrical on either side
8 of 50
What must you include in hydrogen bonding?
The lone pairs in the bond and making sure there is a line of three
9 of 50
Large molecules don't dissolve because
-there is only one hydrogen bond per molecule -it would disrupt the stronger water bonds -rest of the molecule can't form hydrogen bonds
10 of 50
Why reflux?
-avoids loss of volatile vapours -it contains flammable vapours
11 of 50
Hydrogen bonds requirements
-OH bonds -polarised H
12 of 50
Why distillation?
-to capture certian compounds -some compound do have lower boiling points -weaker molecular bonds -less hydrogen bonds
13 of 50
Differentiating compounds from the same homologous series
Fingerprint region
14 of 50
Current of a light shone on a battery
I = P ÷ area exposed
15 of 50
Why is one pulse sent at a time when measuring distance?
-no interference -no overlap -the time of one pulse can be measured
16 of 50
Finding the EMF on a graph
Look at when the current is zero because then there will be no energy loss
17 of 50
Ionisation enthalpy over a period
increases because of an increase in core charge
18 of 50
Ionisation enthalpy down a group
decreases down a group because of an increase in distance
19 of 50
If the intensity of an incident light is increased, the current will increase and the EMF is independent of the light intensity, how I'll this look on a graph?
The line will begin higher and then end in the same place
20 of 50
In order for the electrons to be released
The energy of the photons need to be large enough to be bigger than the work function of the material
21 of 50
Dynamic Equilibrium
Both forward and backwards reactions are progressing. The concentration of each chemical stays the same
22 of 50
Electron rule in 3 and 4 shell
2 electrons go to 4s before 3d
23 of 50
Radical
a particle with an unpaired electron
24 of 50
Production of a chlorine atom
CH3Cl -----> CH3 + Cl
25 of 50
Activation Energy
the minimum combined energy on collison of particles that will lead to a reaction
26 of 50
What happens if you increase the temperature in a reaction?
-rate of reaction increases -molecules gain more energy and move faster -more collisions with energy greater than the activation enthalpy -more successful collisions
27 of 50
Minimum frequency of radiation equation
energy / plancks constant
28 of 50
Why arent free radicals created in the lower troposphere?
UV does not have a high enough frequency at this point
29 of 50
Sound waves in a vacuum
they do not transfer through a vacuum
30 of 50
Sound waves longitudinal or transverse?
Longitudinal
31 of 50
Frequency unit in equations
Hz
32 of 50
When the angle of incidence is equal to the critical
the angle of refraction is 90 degrees
33 of 50
When the angle of incidence is creater than critical
all the light undergoes reflection
34 of 50
Why does sound decrease in pitch when it moves away?
because the distance travelled by the wavefront increases
35 of 50
180 degress in radians
pi radians
36 of 50
90 degrees in radians
2pi radians (one wavelength)
37 of 50
Current in a circuit
shared out and not used up over components
38 of 50
When you rotate a polaroid why does the light get darker?
-reflected light is polarised -polarised light vibrates -polarised only allows vibrations to pass through -when planes are parallel the puddle appears lighter
39 of 50
WHta are electrons known as in unit 2?
charge carriers
40 of 50
Components in series
-the current is the sam,e all the way around -the resistance is proportionally shared between components -voltage decreases over the circuit
41 of 50
Higher resistance in a component on voltage
voltage increases
42 of 50
Higher resistance in a component on current
current decreases
43 of 50
2d and d
1/r^2 and r
44 of 50
Thermoset
doesnt move when heated
45 of 50
Thermoplastic
moves when heated
46 of 50
Reagents
involved in the reaction
47 of 50
Single bonds and rotation
free rotation around the CC bond
48 of 50
When phenylethene reacts with bromine colour change
brown to colourless
49 of 50
Reagent for for dehydration
-high temp -under reflux -conc H2SO4
50 of 50

Other cards in this set

Card 2

Front

Why do molecules absorb infrared of specific frequencies?

Back

They need a specific frequency to make them vibrate

Card 3

Front

Production of Ozone Equation

Back

Preview of the front of card 3

Card 4

Front

Which element is the more reactive in an ionic equation?

Back

Preview of the front of card 4

Card 5

Front

cm3 to dm3

Back

Preview of the front of card 5
View more cards

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