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WorksheetsStandard Solution
Total questions: 11
Worksheet time: 15mins
Your name
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
In dilution method, ___________increase but the_____________ remains constant.
volume of solvent
concentration
mass
number of moles of solute
Based on the diagram, what is the preparation method of solution is used?
Dilution of aqueous solution
Neutralisation
Preparation of standard solution from solid substances
Titration
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
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
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
Calculate the new molarity of solution KOH if 200 cm3 of 2 mol dm-3 KOH is added to 200 cm3 of water.
0.5 mol dm-3
1.0 mol dm-3
0.2 mol dm-3
0.01 mol dm-3
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
80 cm3 of KOH solution with concentration of 0.5 mol dm-3 diluted with 10 cm3 of water. Calculate the new molarity of solution produced.
0.31 mol dm-3
0.44 mol dm-3
0.16 mol dm-3
0.23 mol dm-3
Following shows the apparatus that used in preparation of standard solution from solid substances except
Filter funnel
Pipette
Volumetric flask
Beaker
