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If 1 litre of 2.2M sulphuric acid is poured into…

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How Many Liters are in a Gallon
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If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water, and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be

A. 2.2 M

B. 1.1 M

C. 0.22 M

D. 0.11 M

QUICK ANSWER…

C

SOLUTION 

2.2M = 2.2mol/dm-cube

this simply means 2.2moles of sulphuric acid is present in 1 dm-cube of the solution, or 2.2moles of sulphuric acid is present in 1 liter of the solution.

So, 1 litre of 2.2M sulphuric acid contains 2.2 moles of sulphuric acid,

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If this is poured into 10 liters of water, the new concentration will be:

2.2moles/10liters = 0.22mol/liter or 0.22M

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is incorrect.
  3. C is correct.
  4. D is not the correct answer.

QUICK TIPS…

You may please note these/this:

  • Concentration of an acid is simply the quantity of the molecules of the acid, in moles, present in one liter of water.
  • Simple understanding and use of units can help in arriving at the right answer.

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/ culled from 2018 JAMB-UTME Chemistry question 2 /

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