Titration experiments: 4.3.4 Using concentrations of solutions in mol/dm3 (chemistry only) (HT only): AQA: GCSE (9:1)

0.5

How many moles are there in 2 dm³ of a solution with concentration of 0.25 mol/dm³?

98

How many grams of H₂SO₄ (Mr = 98) would you need to dissolve in 1 dm³ of water to make a solution of 1 mol/dm³?

0.2

How many moles of sodium chloride (Mr = 58.5) would you need to dissolve in 1 dm³ of water to make a solution of 11.7 g/dm³?

0.3

How many moles are there in 250 cm³ of a solution with a concentration of 1.2 mol/dm³?

0.4

How many moles of sodium hydroxide would you need to dissolve in 200 cm³ of water to make a solution of concentration 2 mol/dm³?

16

How many grams of sodium hydroxide (Mr 40) would you need to dissolve in 200 cm³ of water to make a solution of concentration 2 mol/dm³?

1.0

What concentration of sodium hydroxide, in mol/dm³, would be made by dissolving 10 grams in 250 cm³ water?

2.5

What concentration of glucose (Mr = 180) in mol/dm³, would be made by dissolving 9 grams in 20 cm³?

21.2

A solution of sodium carbonate (Na₂CO₃) has a concentration of 0.2 mol/dm³. What is its concentration in g/dm³?

0.3

A solution of ammonia (NH₃) has a concentration of 5.1 g/dm³. What is its concentration in mol/dm³?

0.08

In a titration experiment, 20 cm³ of a 0.1 mol/dm³ solution of sodium hydroxide was needed to neutralise 25 cm³ of a solution of hydrochloric acid. What is the concentration of the hydrochloric acid solution in mol/dm³?

NaOH + HCl → NaCl + H₂O

0.144

In a titration experiment, 18 cm³ of a 0.1 mol/dm³ solution of sodium carbonate was needed to neutralise 25 cm³ of a solution of hydrochloric acid. What is the concentration of the hydrochloric acid solution in mol/dm³?

Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂

burette

What is the name of this piece of equipment?

methyl orange (could also be Phenolphthalein as both reactants are strong)

What would be a suitable indicator to use in a titration between sodium hydroxide and hydrochloric acid?