soalan acids and bases taksonomi bloom

8/8/2019 Soalan Acids and Bases Taksonomi Bloom

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Soalan Acids and Bases mengikut aras Taksonomi Bloom

Aras 1 : Pengetahuan

1. Which of the following is a diprotic acid?

A nitric acid

B sulphuric acid

C hydrochloric acid

D phosphoric acid

Objektif :

2. A solution that can turn blue litmus paper red consists of

A hydroxide ion

B hydrogen ion

C chloride ion

D oxide ion

Objektif :

3. Which of the following is true about an alkali?

A a weak alkali has a high pH value

B a strong alkali has a low degree of ionisation

C an alkali is a base that is soluble in water

D an alkali is volatile

Objektif :

Aras 2 : Kefahaman


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1. Which of the following solution gives the lowest pH value?

A 0.5 moldm-3 sulphuric acid

B 0.5 moldm-3 ethanoic acid

C 0.5 moldm-3 aquoeus ammonia

D 0.5 moldm-3 sodium hydroxide solution

Objektif :

2. Which of the following acidic solutions contains the highest number of hydrogen

ions?

A 25cm3 of 1 moldm-3 hydrochloric acid

B 75cm3 of 1 moldm-3 ethanoic acid

C 25cm3 of 1 moldm-3 sulphuric acid

D 25cm3 of 1 moldm-3 nitric acid

Objektif :

Aras 3 : Aplikasi

1. Based on the equation below, 20cm3 of hydrochloric acid reacts completely with

10cm3 of 0.1 moldm-3 calcium hydroxide solution.

2HCl + Ca(OH)2 CaCl2 + 2H2O

What is the concentration of the hydrochloric acid used?

A 0.05 moldm-3


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B 0.1moldm-3

C 0.2moldm-3

D 0.4moldm-3

Objektif :

2. The equation below shows the reaction between sulphuric acid and potassium

hydroxide.

H2SO4 + 2KOH K2SO4 + 2H2O

What is the volume of 2 moldm-3 potassium hydroxide solution needed to neutralise

50cm3 of 0.5 moldm-3 sulphuric acid?

A 6.25 cm3

B 12.5 cm3

C 25 cm3

D 50cm3

Objektif :

Aras 4 : Analisis


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1.

Experiment

Hydrogen chloride in

Solvent W Solvent Y

Reaction with blue litmus paper No change Blue litmus paper turns red

Reaction with zinc metal No gas bubbles released Bubbles of colourless gas

released

Predict which solvent can conduct electricity and what is the reason?

Solvent that can

conduct electricity

Reason

A W Presence of hydrogen ions

B Y Presence of hydrogen ions

C W Presence of hydroxide ions

D Y Presence of hydroxide ions

Sintesis

Table 2 shows the degree dissociation of four solutions of alkalis which have the same

concentration.

Solution Degree of dissociation

W High

X Medium

Y Very high

Z Low


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Compound N

Hydroxide ion

Arrange the solutions from ascending order of pH value.

A Y, W, X, Z

B X, Z, W, Y

C Z, X, W, Y

D W, X, Y, Z

Evaluation

Compound M

Ionise completely Ionise partially

in water in water

Conclude what is the example of compound M and compound N and compare which one has

the highest pH value.


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Compound M Compound N Highest pH value is compound

A Hydrochloric acid Ethanoic acid N

B Ethanoic acid Hydrochloric acid M

C Sodium hydroxide Ammonia M

D ammonia Sodium hydroxide N

soalan acids and bases taksonomi bloom

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