Making a Solution

Quiz
•
Chemistry
•
10th - 12th Grade
•
Hard
Charles Martinez
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the mass of K2CO3 solid needed to prepare 250.0 cm3 0.500 M solution?
(R.a.m. : K = 39.1, C = 12.0, O = 16.0)
138.20 g
34.55 g
17.28 g
8.64 g
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What are the correct steps in preparing a standard solution of 250.0 cm3 of ethanedioic acid solution from its solid? (use the number in correct order)
(1) Add distilled water until the bottom of meniscus reaches the graduation mark.
(2) Dissolve the weighed solids in a beaker using about 100 cm3 of distilled water.
(3) Stopper the flask and invert the flask several times to mix the contents well.
(4) Weigh a calculated mass of ethanedioic acid solid.
(5) Wash the beaker and the glass rod with distilled water several times and pour all the washings into the flask.
(6) Add distilled water into the flask until the meniscus of solution if about 2 cm below the graduation mark.
4, 5, 2, 6, 1, 3
4, 2, 5, 6, 1, 3
4, 1, 5, 2, 6, 3
4, 2, 6, 5, 1, 3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following equipment is used for diluting a 0.500 M NaOH solution to 0.0500 M?
Measuring cylinder, glass rod, volumetric flask, beaker
Pipette, volumetric flask, pipette filler
Pipette filler, pipette, volumetric flask, dropper
Dropper, volumetric flask, measuring cylinder
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following chemicals CANNOT be used for preparing a standard solution directly from its solid?
K2CO3
Ethanedioic acid
Na2CO3
NaOH
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following is NOT the criteria for using as a primary standard?
Pure
Stable
Soluble in water
Colour
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