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Subject - Chemistry:

Basics

MCQ - 56-2242

Question:

A sample of 2.00 g of iron (III) sulphate, Fe3 (SO3 )3 , is dissolved in water to give 100 cm3 of aqueous solution. What is the concentration of SO4 2 - ions? [The relative formula (molecular) mass of Fe2(SO4 )3 is 400.]

  1. 1.5 × 10-3 mol dm-3
  2. 5 × 10-3 mol dm-3
  3. 1.5 × 10-2 mol dm-3
  4. 5 × 10-3 mol dm-3
  5. 1.5 × 10-1 mol dm-3

Correct Answer: E

Explanation:

1 mole of Fe2(SO4)3 gives 3 moles of SO42- ions.

What is the concentration fo SO32-

=
37 -29970650
= 0.15 mol dm-3

Record Performance

645 MCQ for effective preparation of the test of Basics of Chemistry section.

Read the MCQ statement: A sample of 2.00 g of iron (III) sulphate, Fe3 (SO3 )3 , is dissolved in water to give 100 cm3 of aqueous solution. What is the concentration of SO4 .... Fe2(SO4 )3 is 400.], keenly and apply the method you have learn through the video lessons for Basics to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 56-2242.

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