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- 1. Multiple Choice
What is the meaning of standard solution?
A solution of which its concentration does not accurately known.
Measurement that shows the quantity of solute in one unit of volume of solution
A solution of which its concentration is accurately known.
Concentration that shows the number of mol of solute
- 2. Multiple Choice
A standard solution is prepared by dissolve 2.0 g of sodium hydroxide in distilled water to produce 250 cm3 solution. What is the concentration of the solution?
[RAM: Na = 23; H = 1; O = 16]
0.5 mol dm-3
0.1 mol dm-3
0.2 mol dm-3
0.3 mol dm-3
- 3. Multiple Choice
You want to prepare 100 cm3 of 2.0 mol dm-3 potassium hydroxide solution. What is the mass of potassium hydroxide you need ?
[RAM: K = 39; O =16; H =1]
2.8 g
11.2 g
10.6 g
25.4 g
- 4. Multiple Choice
Calculate the volume of 2.0 mol dm-3 HNO3 needed to prepare 100 cm3 of 1.0 mol dm-3 HNO3 .
10 cm3
50 cm3
20 cm3
25 cm3
- 5. Multiple Choice
Calculate the volume needed to prepare 250 cm3 of 0.05 mol dm-3 H2SO4 from 5.0 mol dm-3 H2SO4 solution.
2.5 cm3
1.5 cm3
5.0 cm3
10.0 cm3
- 6. Multiple Choice
What is the mass of potassium hydroxide needed to prepare 250 cm3 of 0.5 mol/dm3 standard solution? [Relative atomic mass: H = 1, O =16, K=39]
7 g
14 g
21 g
28 g
- 7. Multiple Choice
Calculate the volume of sulphuric acid, H2SO4 of 2.0 mol/dm3 needed for dilution to produce 200 cm3 of 1.0 mol/dm3 of sulphuric acid.
50 cm3
100 cm3
200 cm3
400 cm3
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