Set 9 – Concentrations in Reactions

Moles Set 9 - Concentrations in Reactions

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Barium hydroxide solution will neutralise hydrochloric acid according to the equation

Ba(OH)₂+2HCl =>BaCl₂+2H₂O

If 20 cm³ of 2mol dm^-3 HCl neutralises 100 cm³ of Ba(OH)₂ solution, what is the concentration of the Ba(OH)₂ solution?

0.1 mol dm^-3

0.2 mol dm^-3

0.4 mol dm^-3

0.8 mol dm^-3

2 / 12

Barium hydroxide solution will neutralise hydrochloric acid according to the equation

Ba(OH)₂+2HCl =>BaCl₂+2H₂O

If 1 dm³ of 0.1 mol dm^-3 Ba(OH)₂ neutralises 0.5 dm³ of dilute hydrochloric acid, what is the concentration of the acid?

0.05 mol dm^-3

0.1 mol dm^-3

0.2 mol dm^-3

0.4 mol dm^-3

3 / 12

Barium hydroxide solution will neutralise hydrochloric acid according to the equation

Ba(OH)₂+2HCl =>BaCl₂+2H₂O

What volume of 0.1mol dm^-3 HCl will neutralise 250 cm³ of 0.2mol dm^-3 Ba(OH)₂?

125cm³

250cm³

500cm³

1000cm³

4 / 12

Barium hydroxide solution will neutralise hydrochloric acid according to the equation

Ba(OH)₂+2HCl =>BaCl₂+2H₂O

What volume of 0.1mol dm^-3 Ba(OH)₂ will neutralise 1 dm³ of 0.1mol dm^-3 HCl?

0.5dm³

1.0dm³

2.0dm³

4.0dm³

5 / 12

Potassium hydroxide will neutralise nitric acid according to the equation

KOH+ HNO₃=>KNO₃+ H₂O

25 cm³ of 4.0mol dm^-3 HNO₃is neutralised by 100 cm³ of KOH solution.

What is the concentration of the KOH solution?

0.25 mol dm^-3

0.40 mol dm^-3

0.50 mol dm^-3

1.00 mol dm^-3

6 / 12

Potassium hydroxide will neutralise nitric acid according to the equation

KOH+ HNO₃=>KNO₃+ H₂O

0.5 litres of 1mol dm^-3 KOH is neutralised by 1 litre of a solution of HNO₃

What is the concentration of the HNO₃?

0.25 mol dm^-3

0.5 mol dm^-3

1 mol dm^-3

2 mol dm^-3

7 / 12

Potassium hydroxide will neutralise nitric acid according to the equation

KOH+ HNO₃=>KNO₃+ H₂O

What volume of 4mol dm^-3 HNO₃ will neutralise 80 cm³ of 1mol dm^-3 KOH?

10 cm³

20 cm³

40 cm³

80 cm³

8 / 12

Potassium hydroxide will neutralise nitric acid according to the equation

KOH+ HNO₃=>KNO₃+ H₂O

What volume of 4mol dm^-3 KOH will neutralise 2 litres of 1mol dm^-3 HNO₃?

½ dm³

1 dm³

2 dm³

4 dm³

9 / 12

Zinc metal reacts with hydrochloric acid

Zn+ 2HCl=>ZnCl₂+H₂

What volume of H₂ (measured at r.t.p.) would be produced by reaction of 1 litre of 0.5 mol dm^-3 HCl with an excess of zinc?

[1] ½ dm³

[2] 6 dm³

[3] 12 dm³

[4] 24 dm³

½ dm³

6 dm³

12 dm³

24 dm³

10 / 12

Zinc metal reacts with hydrochloric acid

Zn+ 2HCl=>ZnCl₂+H₂

What volume of 2mol dm^-3 HCl will react with 2 mol of Zn?

½ dm³

1 dm³

2 dm³

4 dm³

11 / 12

Zinc metal reacts with hydrochloric acid

Zn+ 2HCl=>ZnCl₂+H₂

How many moles of Zn will react with 10cm3 of 4mol dm^-3 HCl?

0.01

0.02

0.04

0.08

12 / 12

Zinc metal reacts with hydrochloric acid

Zn+ 2HCl=>ZnCl₂+H₂

How many moles of Zn will react with 1 dm³ 1mol dm^-3 HCl?

0.5

1

2

4

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