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CHEMISTRY > BIG DADDY TOPIC 1 > Flashcards

BIG DADDY TOPIC 1 Flashcards

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1
Q

Balance the equation: Fe+Cl2—–>FeCl3

A

2Fe+3Cl2—->2FeCl3

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2
Q

what is the formula for water

A

H2O

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3
Q

what is the formula for ammonia

A

NH3

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4
Q

what is the formula for ammonium

A

NH4+

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5
Q

what is the formula for nitrate and sulfate

A

NO3- SO42-

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6
Q

what are the formula for hydroxide and carbonate

A

OH- CO32-

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7
Q

how do you write ionic equations

A

take out any aqueous ions that are present on both sides of the equation

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8
Q

what does the nucleus of an atom contain

A

protons and neutrons

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9
Q

how do calculate the amount of neutrons in an atom

A

subtract the atomic number from the mass number

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10
Q

what are isotopes

A

are different forms of the same element, which have the same number of protons but a different number of neutrons

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11
Q

how do you calculate the relative atomic mass of an element from its isotopic abundances

A

multiply each relative atomic mass by its isotopic abundance and add up the result, divide by sum of abundance

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12
Q

what side of the periodic table are the metals

A

left

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13
Q

what type of diagram do you use to show an ionic bond

A

dot and cross

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14
Q

what is an ionic bond

A

when a metal and a non metal react together, the metal atoms loses electrons to form a positive ion and the non metal gains these electrons to form a negative ion

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15
Q

what structure do ionic compounds

A

regular lattice structure

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16
Q

what are the properties of ionic compounds

A

high melting and boiling points, don’t conduct electricity, dissolve in water and conduct electric currents when in the solution

17
Q

adv and disadv of 2D representations

A

show what atoms there are and how they are connected, don’t give idea of size and shape

18
Q

adv and disadv of dot and cross

A

show how things are formed and where the electrons came from but dont show size or arrangement

19
Q

adv and disadv of 3D models

A

show arrangement but only show outer layer of substance

20
Q

adv and disadv of ball and stick models

A

help visualize structure, realistic but make it seem like there are big gaps between atoms dont show correct scales of atoms or ions

21
Q

what is a covalent bond

A

a strong bond that forms when a pair of electrons is shared between two atoms

22
Q

what are the properties of simple molecular substances

A

melting and boiling points very low, gases or liquids at room temp, dont conduct electricity

23
Q

what are the properties of giant covalent structures

A

high melting and boiling points, don’t conduct electricity apart from graphite and graphene, aren’t soluble

24
Q

tell me about diamonds

A

made up of a network or carbon atoms, four covalent bonds, high bp and mp, its rlly hard ;) doesnt conduct electricity

25
Q

tell me about graphite

A

three covalent bonds, sheets of atoms in hexagons, ideal lubricating material ;) high mp, conduct electricity

26
Q

tell me about graphene

A

one layer of graphite, one atom thick sheet

27
Q

what is metallic bonding

A

the electrons in the outer shell of the metal atoms are delocalised, strong forces between positive metal ions and negative electrons

28
Q

properties of metals

A

strong, high mp and bp, shiny at room temp, not soluble, dense, some malleable, good conductors

29
Q

in a chemical reaction what does it tell you if the mass has increased

A

one of the reactant is gas and the products are aqueous, solids or liquids

30
Q

in a chemical reaction what does it tell you if the mass decreases

A

reactants are solids, liquids or aqueous and one of the products is a gas

31
Q

how to calculate number of moles

A

mass in g/ Mr of compound or Ar of element

32
Q

how to calulate the concentration

A

mass/volume

33
Q

how do you find the empirical formula

A

work out how many moles of each element you have, then work out the smallest whole number ratio

34
Q

what is a limiting reactant

A

that reactant that’s used up, once used up the reaction will stop

CHEMISTRY (16 decks)

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