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WorksheetsQuestionnaire 5 Chem (11th)
Total questions: 21
Worksheet time: 18mins
What is the %v/v of a solution formed by adding 15 L of acetone with 28 L of water? (Assume volume can be added)
55,55 %
50 %
1,86 %
How would you make 500mL of 30%v/v vinegar in water solution?
150 mL vinegar with 350mL water
150 mL vinegar with 500mL water
150 mL water with 500mL vinegar
What volume of a 40 % m/v solution contains 70 g of solute?
175 mL
17.5 mL
28 mL
5.0 grams of sugar are dissolved in 150 g of water. What is the %w/w of sugar in the solution?
30 %
3,33 %
3,22 %
What is the mass percentage of a solution created by adding 10 g of olive oil to 190 g of vegetable oil?
5 %w/w
5.26 %w/w
19 %w/w
It measures the mass of solute in grams vs the volume of solution in mL.
% w/w
% w/v
%v/v
What volume must be mixed with 25 mL of water to create a 5% v/v mass solution?
13, 2 mL
1,32 mL
1,25 mL
Molarity is a unit of concentration, measuring the number of moles of a solute per liter of solution
True
False
Determine the molarity of 12.3 mol of solute in 5 L of solution
40,6 M
0,406 M
2,46 M
How many moles of solute are dissolved in 30 mL of solution 3,5 M?
0,105 mol
10,5 mol
0,116 mol
In what volume should 0.8 mol of solute be dissolved to get a 4M solution ?
200 mL
2 L
20 mL
Ca(OH)2 molecular weight is
74 g/mol
57 g/mol
50 g/mol
H2SO4 equivalent weight is
98 g/eq
49 g/eq
33 g/eq
NaOH equivalent weight is
40 g/mol
40 g/eq
20 g/eq
Normality is
the number of equivalents of solute per liter of solution.
the number of mol of solute per liter of solution.
the number of equivalens of solute per kilogram of solution.
How many of grams of water are needed to dilute 500 g of solution from 20%w/w down to 8%w/w?
7,5 g
750 g
75 g
500 mL of solution have to be diluted from 15%w/v down to 5%w/v. What would be the final volume of the solution?
1500 mL
150 mL
15 mL
It is the ratio between the molecular weight and the valence
Molarity
Normality
Equivalent Weight
Valence is the number of electrons available for interaction with other element
True
False
Calculte the normality of solution formed by 2 g H2S in 1,5 L of solution
7,8 N
0,078 N
0,157 N
Explain what happens to a solution if we dilute it
