SC8b Acids - Higher Flashcards
what is a concentrated solutions
a solution that contains more dissolved solute in a certain volume than a dilute solution.
concentration g dm3=
amount dissolved g/ volume of solution dm3
If the concentration of hydrogen ions increases by a factor of 10 than what happens to the pH?
decreases by 1
If the concentration of hydrogen ions decreases by a factor of 10 what happens to the pH
increases by 1
an acid with a pH of 3 is diluted by a factor of 10.
What will the new pH be?
pH 4
What is the pH of the solution formed when 10cm3 of hydrochloric acid (pH 1) is made up to 1000cm3 with distilled water?
pH 3
What is a strong acid?
one that completely dissociates (splits up) into ions when it is dissolved in water.
how is hydrochloric acid formed?
when hydrogen chloride gas dissolves in water.
HCl(g) + aq → H+(aq) + Cl–(aq)
example of strong acid and why is it a strong acid?
HYDROCHLORIC ACID, all of the hydrogen chloride molecules split up to form ions when it dissolves in water.
what is a weak acid?
weak acid only partially splits up into ions in dilute solution, and many unchanged molecules remain.
example of a weak acid and why is it a weak acid?
ETHANOIC ACID - only one molecule out of 100 splits up to form ions when dissolved in water.
What is a concentrated acid?
concentrated acid contains a large mass of acid dissolved in a given volume of solution.
what is a dilute acid?
dilute acid contains a smaller mass of acid dissolved in a given volume of solution.
can you dilute a acid?
yes, by adding water
what is a dilute solution?
contains a smaller number of particles in the same volume of solution.
