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Chemistry > Section 1 > Flashcards

Section 1 Flashcards

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1
Q

rule at the cathode

A

hydrogen will be produced if the metal ions are more reactive than the hydrogen ions

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2
Q

rule at the anode

A

if halide ions are present, halides will be formed

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3
Q

OH- ions at the anode

A

4OH- –> O2 + 2H2O + 4e-

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4
Q

how to increase the amount of substance produced in electrolysis

A
  • electrolyse for a longer time

- increase the current

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5
Q

how many coulombs is one faraday?

A

96,000

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6
Q

what is one faraday?

A

one mole of electrons

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7
Q

how to show diffusion

A

potassium manganate and water

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8
Q

what end does the ammonium chloride ring form closest to?

A

hydrochloric acid end

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9
Q

relative mass of electron

A

1/2000

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10
Q

what is the mass number?

A

number of protons and neutrons

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11
Q

what is the atomic number?

A

number of protons

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12
Q

molecules definition

A

groups of atoms

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13
Q

elements consist of…

A

one type of atom only

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14
Q

compound definition

A

a substance that is made of two or more different elements which are chemically bonded together

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15
Q

what is the difference between a compound and a mixture?

A

there is no chemical bond between the different parts in a mixture

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16
Q

what is filtration used for?

A

separating an insoluble solid from a liquid

17
Q

what is crystallization used for?

A

to separate a soluble solid from a solution

18
Q

what can be separated by filtration and crystallisation?

A

rock salt

19
Q

isotope definition

A

different atomic forms of the same element, which have the same number of protons but different numbers of neutrons

20
Q

what is Avogadro’s number?

A

6.023*10^23

21
Q

volume equation

A

moles of gas * 24

22
Q

concentration formula

A

no. of moles/volume

23
Q

when do ionic compound conduct electricity?

A

when molten or in solution

Chemistry (15 decks)

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