C5 - Chemical Changes (titrations)

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

Card preview (24)

Front (Question)

Reactions: 1. Metal + acid 2. Metal hydroxide + acid 3. metal carbonate + acid 4. Metal + water 5. Metal + oxygen

Back (Answer)

• Salt + hydrogen • Salt + water • Salt + water + carbon dioxide • Metal hydroxide + hydrogen • Metal oxide

Front (Question)

Neutralisation ionic equation

Back (Answer)

OH- + H+ —> H2O

Front (Question)

Strong vs weak vs dilute acids

Back (Answer)

Strong - Completely ionise in solution. High concentration of H+ ions in the acid Weak - Don’t completely ionise in solution - reversible reactions. (Carboxyllic acids) Dilute - low concentration of acid in water As H+ concentration x10, pH decreases by 1

Front (Question)

Salt endings + charges

Back (Answer)

• OH^- (hydroxide) • NO3^- (nitrate) • SO4^2- (Sulfate) • CO3^2- (carbonate)

Front (Question)

What are alkalis

Back (Answer)

Soluble bases pH greater than 7 Dissociate into OH- ions in solution

Front (Question)

What are the units for concentration?

Back (Answer)

g/dm3 and mol/dm3

Front (Question)

Which formula relates concentration

Back (Answer)

mass / volume mol / volume

Front (Question)

Which formula relates concentration

Back (Answer)

moles and volume?

Front (Question)

What is a strong acid?

Back (Answer)

An acid which completely splits up into its ions in water e.g. when HCl is in water all the HCl molecules split up into H+ and Cl-

#10

Front (Question)

What is a weak acid?

Back (Answer)

An acid which will have some molecules which do not split up into their ions e.g. Ethanoic acid CH3COOH ⇌ CH3COO- + H+

#11

Front (Question)

What is the relationship between the strength of an acid and its pH?

Back (Answer)

As an acid increases in strength

#12

Front (Question)

What is a concentrated acid?

Back (Answer)

An acid where there are lots of acid particles in the water

#13

Front (Question)

What is a dilute acid?

Back (Answer)

An acid where there are fewer acid particles in the water

#14

Front (Question)

How does pH depend on the concentration of the H+ in a solution?

Back (Answer)

As the concentration of H+ increases by a factor of 10

#15

Front (Question)

Define acids in terms of pH

Back (Answer)

A substance with a pH less than 7

#16

Front (Question)

Define acids in terms of ions

Back (Answer)

A substance which releases H+ ions in solution

#17

Front (Question)

State the three common acids and give their formulae

Back (Answer)

Hydrochloric acid HCl (aq)

#18

Front (Question)

Which ions do the common acids form in solution?

Back (Answer)

HCl forms H+ and Cl-

#19

Front (Question)

What is a neutral solution?

Back (Answer)

A solution with a pH of 7

#20

Front (Question)

How do you measure pH?

Back (Answer)

An indicator or a pH probe

#21

Front (Question)

What is a base?

Back (Answer)

A metal oxide

#22

Front (Question)

What is an alkali?

Back (Answer)

A soluble base e.g. NaOH

#23

Front (Question)

Which ions are always present in a solution of an alkali?

Back (Answer)

OH-

#24

Front (Question)

What is a salt?

Back (Answer)

A compound formed where some or all of the hydrogen from an acid is replaced by a metal