Unit 1
Solubility and Concentration
Water
Acids and Bases
Redox Reactions
100

Which molecule, CO2, CH4, CF4 or PH3 is the most polar molecule?

Molecule: PH3 

Individual bond: CF4 


100

The point of solubility where all the solvent molecules are already occupied by solute particles. They cannot form anymore solute-solvent interactions. 

Saturated

100

The group name of H2O, H2S, H2Se...

Hydrides

100

A pair of molecules where one donates and one accepts a proton

Conjugate acid-base pairs
100

What goes through oxidation

Reducing agent

200

The dilution formula

C1 x V1 = C2 x V2

200

The maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature

Solubility

200

The quantity of particles in a given space. It can be calculated by dividing mass in grams by volume in L or cm3

Density

200

H2O, HCO3-, H2PO4- and HSO4- are all examples of...

Amphiprotic substances

200

The mnemonic aid to help remember the steps used to balance half equations under acidic conditions at 25oC

K- key elements

O- oxygen by adding H2O

H- hydrogen by adding H+ ions

E- electrons

S- states

300

Match these: oxidation number, charge, +3, 3+

Oxidation number = +3

Charge = 3+

300

A tea bag contains 13g of tea in 45mL of water. What is this concentration in %m/m?

29%g/g

300

The amount of heat energy needed to increase the temperature of 1 gram of a substance by 1oC

Specific Heat Capacity

300

In a neutralisation reaction, salt, water and carbon dioxide are products from reacting... (provide 2 possible answers)

1. Acid + Metal carbonate

2. Acid + Metal hydrogen carbonate

300

The table which orders conjugate oxidising/ reducing agent pairs based on their strength

Electrochemical series

400

Put these in order of strongest to weakest intermolecular forces:  FeCl (aq), Fe (s), HCl (aq),

Fe (s), FeCl (aq), HCl (aq),

400

Calculate the concentration in ppm of 218mg of Mercury in 1.25L of solution. (assume density of mercury is 1g/ml)

174ppm

400

The amount of heat energy needed to change 1 mole of a substance from a solid to a liquid at its' melting point without changing the temperature of the substance

Latent heat of fusion

400
Calculate the pH of 0.34M of Calcium carbonate 

13.5

400

For this reaction: 

Mg(s) + 2H+ (aq) --> Mg2+ (aq) + H2 (g)

The reduction reaction is...

2H+ (aq) + 2e --> H2 (g)

500

Location of the most negative dipole for PH3. 
(Draw an image if needed)

Most negative dipole is on the lone pair connected to the Phosphorus atom

500

The 2 scientists who created the current definitions of acids and bases

Bronsted and Lowry

500

The amount of heat energy needed to change 1 mole of a substance from a liquid to a gas at its' boiling point without changing the temperature of the substance

Latent heat of vaporisation

500

Ions that don't participate in a chemical reaction

Spectator ions

500

Explain the 3rd oxidation number rule (hint- O)

3rd rule tells us that Oxygen will always have an oxidation number of -2. However, OF2 and -O22- are exceptions with oxidation numbers of +2 and -1 respectively.