C1
Atomic Structure
C1
Separation Methods
C2
Bonding
C2
Bonding
C3
Quantitative Chemistry
100

Balance the following equation: 

___Al + ___HCl --> ___AlCl3 + ___H2


2Al + 6HCl --> 2AlCl3 +3H2

100

What's the difference between a compound and a molecule?

Compound = 2 or more atoms of DIFFERENT elements chemically bonded together

Molecule = 2 or more atoms chemically bonded together

100

What type of bonding is present when atoms gain or lose electrons?

ionic bonding

100

In metallic bonding, how are the atoms / positive ions arranged?

layer upon layer 

regular pattern

100
calculate the number of moles in 100g Au 

0.5076 - 0.508

200

Compare the J.J Thompson's plum pudding and Niels Bohr's models of the atom. 

J.J Thompson:

No nucleus

No protons

No electron shells

200

How can a soluble solid be separated from a liquid?

Evaporation OR Crystallisation OR Distillation

200

Name the type of bonding and structure of NH3 

covalent bonding

simple molecules

200

Explain why NaCl cannot conduct electricity as a solid but can conduct electricity when dissolved in water. 

Solid = ions are not free to move

Dissolved in water = ions are free to move

200

How many atoms are there in 100g of Fe?

Avogadro's constant is 6.022 x 1023 

1.075 x 1024 atoms

300

Balance the following equation:

___BF3 + ___ Li2SO3 --> ___B2(SO3)3 + ___LiF

2BF3 + 3Li2SO3 --> B2(SO3)3 + 6LiF

300

What is the method I could use to separate different colours of ink in a pen?

Chromatography

300

Explain the differences in properties between a pure metal and its alloy

Different sized atoms

Layers are disrupted

Layers cannot slide easily

300

In terms of the structures, explain why diamond cannot conduct electricity but graphite can. 

Each C in diamond has 4 C-C strong covalent bonds. 

Each C in graphite has 3 C-C strong covalent bonds. Each C has a delocalised electron which carries the charge through the structure

300

Zinc oxide is heated with carbon to make zinc and carbon monoxide. How much zinc oxide do you need to make 65g of zinc?

ZnO + C → Zn + CO

81g

400

Calculate the relative atomic mass of copper. Give your answer to 3 s.f. 

Copper-63 has percentage abundance of 69.2

Copper-65 has percentage abundance of 30.8

63.6

400

Explain the steps of separating a soluble salt and sand.

In the end, you must have solid salt and sand separately. 

1. Add water, stir until the salt is dissolved. 

2. Filtration, filtrate = salt water,  residue = sand

3. Evaporation / Distillation, salt crystals

400

Suggest 1 reason why silver nanoparticles are more effective than bulk silver at killing bacteria

larger surface area

large surface area : volume ratio 

400

Draw a dot and cross diagram for MgCl2 on the whiteboard.

I decide!

400

How many ions are there in 100g of NaCl? 

Avogadro's constant = 6.022 x 1024


Mr NaCl = 23 + 35.5 = 58.5

moles = 100/ 58.5 = 1.709401709 mols

Particles = mols x 6.022 x 1023 = 1.029401709 x 1024

x2 (there are 2 ions) = 2.0588 x 1024 ions

500

State and explain the reactivity trend shown in Group 1 metals 

Reactivity increases down the group.

There are more electron shells as you go down the group.

Electron in the outer shell further away from the nucleus.

Less attraction to the positive nucleus 

The electron is easily lost.

500

Explain how to calculate the Rf value from a chromatogram 

distance spot travelled 

divided by

distance solvent travelled 

(number is always less than 0 )  

500

Draw a dot and cross diagram for N2

I decide!

500

Describe Buckminster Fullerene.

C60

Allotrope of carbon

Spherical molecule - can insert small molecules inside

500

A student adds 9.6g of magnesium to excess dilute hydrochloric acid. What mass of HCl would be needed?

___ Mg + ___ HCl → ___MgCl2 + ___H2


28.8g

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