1. Question

Calculate the volume of 0.5 mol dm^-3 H₂SO₄ that is neutralized by 25 cm³ of 0.1 mol dm^-3 NaOH

5.0 cm³

2.5 cm³

0.4 cm³

0.1 cm³

2. Question

A solution of sodium hydroxide containing 6.0 g in 250 cm³ of solution has a concentration of

[Molar mass of NaOH = 40 g/mol]

0.04 mol dm^-3

0.15 mol dm^-3

0.60 mol dm^-3

0.96 mol dm^-3

3. Question

The colour of methyl orange indicator in acidic medium is

yellow

pink

orange

red

4. Question

0.05 mol dm^-3 HCl is neutralized by 25 cm³ NaOH. If the volume of acid used is 32.00 cm³, what is the concentration of the base?

0.016 mol dm^-3

0.032 mol dm^-3

0.039 mol dm^-3

0.064 mol dm^-3

5. Question

The colour of phenolphthalein indicator in dilute HCl is

colourless

orange

pink

purple

6. Question

Consider the reaction represented by the question below:

KOH_(aq) + HCI_(aq) → KCI_(aq) + H₂O_(l)

What volume of 0.25 mol dm^-3 KOH would be required to completely neutralize 40 cm³ of 0.10 mol dm ^-3 HCl?

40 cm³

32 cm³

24 cm³

16 cm³

7. Question

20 cm³ of 0.09 mol dm³ solution of tetraoxosuiphate(VI) acid requires 30 cm³ of sodium hydroxide solution for complete neutralization. The molar concentration of sodium hydroxide is

[H = 1; S = 32; 0 = 16; Na = 23]

0.03 mol dm^-3

0.12 mol dm^-3

0.27 mol dm^-3

0.45 mol dm^-3

0.90 mol dm^-3

8. Question

Na₂CO₃_(aq) + 2HCl_(aq) → 2NaCl_(aq) + H₂O_(l) + CO_2(g)

How many moles of sodium trioxocarbonate(IV) is there in a 25 cm³ solution which requires 10 cm³ of 0.05 moldm^-3 hydrochloric acid solution to neutralize it?

0.0003 mole

0.1000 mole

0.0100 mole

0.0010 mole

9. Question

What volume of 1.5 M solution of KOH_(aq) would contain 0.045 mole?

67.50 cm³

30.00 cm³

6.75 cm³

3.00 cm³

10. Question

Consider the neutralization reaction represented by the following equation:

Na₂CO_3(aq) + 2HNO_3(aq) → 2NaNO_3(aq) + H₂O_(l) + CO_2(g)

The stoichiometric ratio of acid to base is

2:2

2:1

1:2

1:1

11. Question

25 cm³ of 0.80 moldm^-3 hydrochloric acid neutralized 20 cm³ of sodium hydroxide solution . What is the concentration of sodium hydroxide in moldm^-3?

NaOH_(aq) + HCl_(aq) → NaCl_(aq) + H₂O_(l)

0.08

0.10

0.80

1.00

12. Question

If 20 cm³ of distilled water is added to 80 cm³ of 0.50 moldm^-3 hydrochloric acid, the new concentration of the acid will be

0.10 mol dm^-3

0.20 mol dm^-3

0.40 mol dm^-3

2.00 mol dm^-3

13. Question

If 5.00 cm³ of 0.20 moldm^-3 Na₂CO₃ was dilute with distilled water to obtain a 250 cm³ solution, what is the concentration of the resulting solution?

0.004 mol dm^-3

0.02 mol dm^-3

0.20 mol dm^-3

0.40 mol dm^-3

14. Question

The colour of methyl orange in alkaline medium is

yellow

pink

orange

red

15. Question

If 10 cm³ of distilled water is added to 10 cm³ of an aqueous salt solution , the concentration of the solution ____

increases

decreases

remains constant

doubles

16. Question

Which of the following apparatuses can be used to measure accurately a specific volume of a liquid ?

beaker

conical flask

measuring cylinder

pipette