Atomic Structure
Bonding
Chemical Changes
Energy Changes
Miscellaneous
100
What is the charge of an electron?
-1 (Negative one)
100
Sodium Chloride (table salt) is an example of what type of bonding?
Ionic
100
Name 2 compounds you could react with sulphuric acid to produce copper sulfate.
Copper carbonate or copper oxide
100
A cold pack works after popping and mixing the chemicals together. What type of reaction is used: endothermic or exothermic?
Endothermic
100
What pH is copper sulfate?
What colour will universal indicator turn into?
pH = 7
Green
200
Write the electronic configuration of Chlorine.
2,8,7
200
Chlorine gas (Cl2(g)) is an example of what type of bonding
Covalent bonding
200
Electrolysis of sodium chloride will produce these products at the cathode and anode, respectively.
Cathode - Hydrogen gas
Anode - Chlorine gas
200
Name one example of a combustion reaction found in nature.
Aerobic respiration
200
Explain why ammonia is a weak base while sodium hydroxide is a strong base
Sodium hydroxide fully ionises in solution, ammonia does not.
300
Atoms of the same element, _____ protons and electrons, _______ number of neutrons.
Atoms of the same element, same protons and electrons, different number of neutrons.
300
Zinc and Sodium metal are examples of what type of bonding?
Metallic Bonding
300
Complete a half equation for the formation of chlorine gas
2Cl- _> Cl2 + 2e-
300
What is the catalyst on this graph changing?
Activation Energy (EA)
300
List all the gas tests and the positive result you're looking for.
Burning splint - Popping sound
Glowing splint - Relighting a splint
Damp litmus paper - Bleached paper
Limewater - Turns cloudy/milky
400
Draw the model of an atom that Ernst Rutherford disproved.
400
Name an element that shouldn't bond with any chemical.
Any noble gas.
Helium, neon, krypton, radon, xenon.
400
What is the ionic equation for a neutralisation reaction?
H+ + OH- -> H2O
400
This graph is showing what type of reaction? Exothermic or endothermic?
Exothermic, the products have less energy (lower on the graph) than the reactants.
400
What reactants do I need to produce calcium chloride?
Calcium oxide + hydrochloric acid -> calcium chloride + water
500
Draw Niel Bohrs model of the atom
500
Balance this equation:
CH4 + O2 -> H2O + CO2
Methane + Oxygen -> Water + Carbon Dioxide
CH4 + 2O2 -> 2H2O + CO2
Methane + Oxygen -> Water + Carbon Dioxide
500
Define oxidation and reduction in terms of oxygen.
HIGHER - In terms of electrons.
Oxidation is the addition of oxygen in substances, reduction is the loss of oxygen in substances.
HIGHER - Oxidation is the loss of electrons. Reduction is the gaining of electrons. (OILRIG)
500
After making a chemical reaction, you see a change in energy of +1000 KJ.
Was this reaction endothermic or exothermic? How do you know?
Endothermic (gained energy)
500
What steps do you take during the ''Temperature changes'' practical to ensure a valid result?
Use a polystyrene cup to insulate the reaction.