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Question 1 of 10
1. Question
1 point(s)28g of NaOH is dissolved in 250cm³ of water. Calculate the concentration of the solution in mol/dm³. [Relative Formula Mass of NaOH = 40]
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Question 2 of 10
2. Question
1 point(s)2K + CuSO₄ → K₂SO₄ + Cu
The equation above represents the reaction between potassium and copper(II) sulphate solution. Find the volume of 0.5 mol/dm³ copper(II) sulphate solution needed to completely react with 3.51g potassium. [Relative Atomic Mass of Potassium = 39]
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Question 3 of 10
3. Question
1 point(s)25 cm³ of 0.5 mol sodium hydroxide solution is diluted with water until its volume becomes 100cm³. What is the concentration of the solution produced?
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Question 4 of 10
4. Question
1 point(s)You are asked to prepare 250 cm³ of the aqueous sodium hydroxide solution of concentration 0.5 moldm⁻³. Find the mass of sodium hydroxide that you need to dissolve into the solution.
[ Relative atomic mass: Na=23, O = 16; H=1]CorrectIncorrect -
Question 5 of 10
5. Question
1 point(s)Which of the following acids contains the greatest number of hydrogen ions?
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Question 6 of 10
6. Question
1 point(s)Calculate the number of mol of hydrogen ions in 200cm³ of 0.4 mol dm⁻³ sulphuric acid.
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Question 7 of 10
7. Question
1 point(s)Find the number of mole of sodium ions in 100cm³ of 0.5 mol/dm³ sodium sulphate solution.
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Question 8 of 10
8. Question
1 point(s)Find the volume of sodium chloride aqueous, 0.5 mol/dm³ that contains 0.7 mol of sodium chloride.
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Question 9 of 10
9. Question
1 point(s)The molarity of acid X is 0.2 mol/dm³. Find the relative molecular mass of acid X if its concentration is 19.6g/dm³.
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Question 10 of 10
10. Question
1 point(s)The concentration of a potassium chloride solution is 14.9 g dm⁻³. What is the molarity ( mol dm⁻³) of the solution? [ Relative Atomic Mass: Cl = 35.5; K = 39 ]
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