6. Giant ionic lattice structures' melting point are...?

7. Simple molecular structures' solubilities in water are...?

Catalysts increase the rate of the forwards and backwards reaction equally, so overall the rate of the reaction does not change
Catalysts provide an alternative route for the reaction with a lower activation enthalpy. Therefore, more colliding molecules will have greater than the activation enthalpy required for the reaction, increasing the frequency of successful collisions
Catalysts have no effect on the rate of a reaction
Catalysts actually decrease the rate of the reaction because they increase the number of steps in a reaction

Rotating the crops around ensures that they don't have enough time to settle down properly and so grow poor roots, making them easier to extract from the soil
Having a variety of crops means that if a disease of pest kills off one crop, the farmer always has some crops left to sell
Different minerals are taken from the soil by different plants, so there are always sufficient nutrients for each crop as the land has time to recover. Also, crops can be staggered throughout the year and there isn't time for pests to build up
Crops can be grown throughout the year, so the minerals in the soil are always being used

Minimise waste, only use energy from renewable sources, dispose of all hazardous waste safely
Minimise waste (high atom economy + percentage yield or recycling unreacted reactants), minimise the use of environmentally hazardous products such as heavy metal catalysts, maximise energy efficiency
Minimise the time taken for a reaction to occur, donate money towards environment initiatives to compensate for the large carbon footprint of an industrial process, only produce useful products
Use naturally occurring reactants and catalysts extracted from living organisms to reduce human impact on the environment

They take many years to degrade into harmless substances so are more dangerous if released into water supplies; continue to kill organisms after the crop has been harvested; more likely to bioaccumulate and kill top predators
They will last for longer in water supplies and so kill humans as well as pests
None - persistent pesticides last for longer so the crop is protected for longer, thus reducing costs
They take many years to degrade into harmless substances so may harm the crop as well as the pest

A fungicide which spreads throughout the whole of the plant, including new growth
A fungicide which works gradually through a crop to remove fungi
A fungicide which targets only specific fungi
A fungicide which works only on the existing leaves of plants and doesn't protect new growth