Unit 1
Which molecule, CO2, CH4, CF4 or PH3 is the most polar molecule?
Molecule: PH3
Individual bond: CF4
The point of solubility where all the solvent molecules are already occupied by solute particles. They cannot form anymore solute-solvent interactions.
Saturated
The group name of H2O, H2S, H2Se...
Hydrides
A pair of molecules where one donates and one accepts a proton
What goes through oxidation
Reducing agent
The dilution formula
C1 x V1 = C2 x V2
The maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature
Solubility
The quantity of particles in a given space. It can be calculated by dividing mass in grams by volume in L or cm3
Density
H2O, HCO3-, H2PO4- and HSO4- are all examples of...
Amphiprotic substances
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
Match these: oxidation number, charge, +3, 3+
Oxidation number = +3
Charge = 3+
A tea bag contains 13g of tea in 45mL of water. What is this concentration in %m/m?
29%g/g
The amount of heat energy needed to increase the temperature of 1 gram of a substance by 1oC
Specific Heat Capacity
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
The table which orders conjugate oxidising/ reducing agent pairs based on their strength
Electrochemical series
Put these in order of strongest to weakest intermolecular forces: FeCl (aq), Fe (s), HCl (aq),
Fe (s), FeCl (aq), HCl (aq),
Calculate the concentration in ppm of 218mg of Mercury in 1.25L of solution. (assume density of mercury is 1g/ml)
174ppm
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
13.5
For this reaction:
Mg(s) + 2H+ (aq) --> Mg2+ (aq) + H2 (g)
The reduction reaction is...
2H+ (aq) + 2e --> H2 (g)
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
The 2 scientists who created the current definitions of acids and bases
Bronsted and Lowry
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
Ions that don't participate in a chemical reaction
Spectator ions
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.