chemical reactivity

what does it mean if K_c<1

reactants are favoured

what does it mean if K_c>1

products are favoured

what impact does concentration have on K_c

NOTHING

what is the only things that changes the value of Kc

temperature - when temp goes up equilibrium shifts to favour the endothermic side to absorb the heat which means K_c changes to reflect that eg. forward reaction is exothermic and reverse is endothermic so as temp increase equilibrium shifts to favour reverse and K_c decreases

what is the ethanoate ion

CH₃OO^- acts as a weak base

is bond forming endothermic or exothermic

exothermic

is bond breaking exothermic or endothermic

endothermic

what does malleable or ductile mean

indicates non-directional bonds that can be slid over themselves and pulled into shapes

what does it mean if a substance is hard

it has strong covalent, metallic, or ionic bonds holding it together which require large amounts of energy to be broken

change of state from gas to liquid to solid

exothermic because bonds are being formed

change of state from solid to liquid to gas is endothermic or exothermic

endothermic because bonds are being broken

do products have more or less energy than the reactants in an exothermic reaction

products have less because energy is released to the surroundings when the bonds in the products are formed

do products have more or less energy than reactants in an endothermic reaction

products have more because there is more energy absorbed from the surroundings to break the bonds from the reactants

why does a non-polar substance dissolve in a non-polar solvent

the forces of attraction between the solute molecules are very similar to the attraction between the molecules of the non-polar solvent which means they can replace each other, meaning the solute dissolves