EXPERIMENT 2 : ACIDS BASES TITRATION : CONCENTRATION OF HCl

Select the suitable apparatus for transferring 25 mL solution.

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Which diagram shows the correct meniscus level of 10 mL pipette ?

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When diluting an acid with water, always remember to:

• Pour water into acid

• Pour acid into water

• Add both at the same time

Select the suitable apparatus to prepare 250 mL of diluted solution ?

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What is the suitable apparatus that can be used to ensure the volume of the solution

does not exceed the calibrated mark ?

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Before transferring the solution, the burette is rinsed with :

• distilled water and NaOH

• NaOH only

• phenolphthalein, distilled water and NaOH

• distilled water and H₂SO₄

Choose the correct way in filling the burette with NaOH solution .

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The initial burette reading is _________

• 21.70 mL

• 21.07 mL

• 20.03 mL

• 20.30 mL

Choose the best result of titration below :

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If the student observe that the solution does not reach the end point, it shows

that :

• no phenolphthalein added

• no distilled water added

• no acid added

• error in setup of equipment