things i need to work on SMHHHHHH Flashcards
how do you explain the effects of INcreasing temperature on the reaction rate
you would THINK it would be to do with greater kinetic energy and hence more successful collisions but YOU ALSO HAVE TO SAY THAT THERES MORE PARTICLES WITH ENERGY GREATER THAN THE ACTIVATION ENERGY.
WHAT. DO. YOU. DO. IF. YOU. NEED. TO. BALANCE. ION. ELECTRON. EQUATIONS?
use water.
explain the different between bond enthalpy and mean bond enthalpy
mean bond enthalpy must refer to an average energy and to a number of compounds and bond enthalpy must relate to one compound/diatmoic molecule
in an investigation using the concentration of a reactant, why must the beaker be dry of all water before commencing a repeat experiment
the water can change the concentration. this keeps the concentration constant
why does decreasing concentration of reactants slow down the reaction rate
the frequency of successful collisions will decrease
why must titration be carried out under acidic conditions
to provide H+ ions for the reaction
what are the different reduction reaction atoms to look out for when identifying them for each oxidising agent
tollens; look out for silver (Ag)
benedicts; look out for copper (Cu)
acidified dichromate; Cr2O7
permangenate; MnO4
which type of bond is broken when a protein is denatured
hydrogen bonds
what is volatility relative to
intermolecular attractions; the smaller the molecule the more volatile; think about the boiling point because if something is very volatile it is likely to have a very low boiling point and therefore low intermolecular attractions because not a lot of energy is needed to make it evaporate
what must an emulsifier have
a hydroxyl group and a fatty acid
what is the area under the curve of an energy distribution diagram relative to
the number of particles
what is the molecular formula for an isoprene
2methylbuta-1,3-diene C5H8
what are the factors that can affect the viscosity of alcohols
- the strength of the intermolecular forces
- the size of the molecule
- temperature
if two elements share electrons equally in the bond, what does this mean?
they have the same electronegativity
what method can be used to separate molecules with different boiling points
distillation