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acids and bases 3.1.12 in papers 1+3

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

whats an acid?

Back (Answer)

proton donator

#2
Front (Question)

whats a base?

Back (Answer)

proton acceptor

#3
Front (Question)

how do weak and strong acids dissociate?

Back (Answer)

• strong acids completely dissociate • weak acids partially dissociate

#4
Front (Question)

what is pH?

Back (Answer)

-log10[H+]

#5
Front (Question)

how do you calculate [H+]?

Back (Answer)

10^-pH

#6
Front (Question)

what does increasing the concetration of H+ ions do?

Back (Answer)

decreases the pH

#7
Front (Question)

what is the ionic product of water?

Back (Answer)

kw= [OH-][H+]

#8
Front (Question)

whats the effect of kw as tempreture increases?

Back (Answer)

increases

#9
Front (Question)

what is ka?

Back (Answer)

dissociation constant for a weak acid

#10
Front (Question)

whats the ka expression?

Back (Answer)

[H+][A-] ——.———- [HA]

#11
Front (Question)

how do you calculate pka?

Back (Answer)

-logka

#12
Front (Question)

how do you calculate ka?

Back (Answer)

10^-pka

#13
Front (Question)

how do you calculate [H+] of pure water?

Back (Answer)

square root kw

#14
Front (Question)

how do you calculate [H+] of a weak acid?

Back (Answer)

square root of ka x its concentration

#15
Front (Question)

how do you calculate [H+] at 1/2 equivilance point?

Back (Answer)

ka

#16
Front (Question)

how do you calculate [H+] of an acidic mixture?

Back (Answer)

n(left over H+ ions) ——-.———————— total volume

#17
Front (Question)

how do you calculate [H+] of an alkaline mixture?

Back (Answer)

kw —.—– ( n(left over OH- ions) —-.—————————- new total volume

#18
Front (Question)

what is the equivilance point?

Back (Answer)

• acid and alkali react as per their balanced equation • salt and water is left over

#19
Front (Question)

why does a pH titration curve start with a straight line?

Back (Answer)

[H+] wouldnt stay constant

#20
Front (Question)

how to choose a suitable indicator?

Back (Answer)

• one that changes rapidly during titration • indicator range must fall into pH range

#21
Front (Question)

what is a buffer solution?

Back (Answer)

a solution that resits a change in pH when small amounts of an acid or an alkali are added?

#22
Front (Question)

what is an acidic buffer made of?

Back (Answer)

weak acid + its salt

#23
Front (Question)

what is a basic buffer made of?

Back (Answer)

weak base + its salt

#24
Front (Question)

what happens when you add an acid to an acidic buffer?

Back (Answer)

• equilibrium shifts to the left to counteract increase in H+ • removing added H+