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6.5 KEPEKATAN LARUTAN AKUEUS

Authored by EIZREEN EIZREEN

Chemistry

8th Grade

Used 5+ times

6.5 KEPEKATAN LARUTAN AKUEUS
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5 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Berapakah kepekatan suatu larutan NaOH dalam g dm-3 jika kemolaran larutan itu ialah 0.5 mol dm-3 ?

[Jisim atom relatif: N= 23;O = 16;H =1 ]


What is the concentration of NaOH with a molarity of 0.5 mol dm-3 in unit g dm-3?

[Relative atomic mass: N= 23;O = 16;H =1]

5 g dm-3

35 g dm-3

20 g dm-3

15 g dm-3

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Berapakah jisim NaOH yang diperlukan untuk menyediakan 250 cm3 larutan NaOH yang berkepekatan 100 g dm-3 ?

[Jisim atom relatif: Na= 23;O = 16;H = 1]


What is the mass of NaOh needed to prepare 250cm3 of NaOH solution with the concentration of 100 g dm-3?

[Relative atomic mass: Na=23, O=16, H=1]

10 g

25 g

55 g

40 g

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

20 cm3 air suling dicampurkan kepada 50 cm3 asid sulfurik 1.0 mol dm-3. Apakah yang akan berlaku?


20cm3 of distilled water is added into 50cm3 of sulphuric acid 1.0 mol dm-3. What will happen?

pH asid sulfurik akan bertambah (pH of the acid will increase)

Bilangan mol asid sulfurik akan berkurang (number of moles of acid will decrease)

Kepekatan asid sulfurik akan bertambah (Cncentration of acid will increase)

Darjah penceraian asid sulfurik akan bertambah (Degree of dissociation of acid will increase)

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Suatu larutan elektrolit mempunyai kepekatan 0.2 mol dm-3. Berapakah bilangan mol bagi 50 cm3 larutan itu?


(An electrolyte solution has a concentration of 0.2 mol dm-3. What is the number of moles for 50cm3 of that solution?)

0.01 mol

1 mol

0.25 mol

4 mol

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Ba(OH)2 => Ba2+ + 2OH-

Kirakan bilangan mol ion hidroksida yang hadir dalam 250 cm3 larutan Ba(OH)2 0.2 mol dm-3.


(Calculate the number of moles of hydroxide ion presents in 250cm3 of Ba(OH)2 solution 0.2 mol dm-3)

0.15 mol

0.01 mol

0.10 mol

0.5 mol

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