SC8 b Looking at acids
How many time more acidic is HCl with a pH of 0 than vinegar with a pH of 4
0-4= 10x10x10x10= 10000 times more acidic =concentration of H+ ions 10000 times greater
Formula to work out concentration
Concentration amount dissolves /volume of solution
The more concentrated the acid the .... It reacts with magnesium metal
Faster
What does concentration mean?
How much of the solute is located throughout the solvent.
Concentrated means
Large amount of solute in a small volume of solvent
What metal can you use to test the strength of acids?
Magnesium
dilute means
Small amount of solute in a large volume of solvent
The pH level of an acid depends on two factors:
Strength of the acid Concentration of the acid
How does a strong acid differ from a weak acid?
Strong acid molecules break up completely into ions when they dissolve in water whereas weak acids only partially break up into ions.
Between each pH 0-7 level the concentration of H+ ions increases by what?
X10
Units for concentration of a solution
g dm-3