Question

the number of milimoles of h2so4 present in 5 litres of 0.2n h2so4 solution ios

Answer 1

There are 1000 milimoles in 1 mole and 1milimole = 0.001 mole

We can use this information to calculate the number of milimoles in this solution of sulphuric acid.

Calculate the number of moles of 5 liters of 0.2N H₂SO₄:

Step 1: Convert the 0.2N( Normality) to Morlarity

- Normality is converted to Morlarity by dividing the Noramilty by the number of hydrogen ions in the acid ( or hydroxide ions in the base)

- Hydrogen ions in H₂SO₄ are 2

∴ Molarity of 0.2N H₂SO₄ = 0.2/2 = 0.1 Molarity

Step 2: Calculate the number of moles of 0.1M H₂SO₄

Molarity = moles of solute / liter of solution

Moles = molarity × liter of solution

∴ Moles of 5 liters of 0.1M H₂SO₄ = 0.1M × 5liters

= 0.5 moles

Therefore the moles of 0.2N H₂SO₄ = 0.5 moles

Convert 0.5 moles to milimoles:

1 mole = 1000milimoles

0.5 moles = 1000milimoles × 0.5 moles/1 mole

= 500 milimoles

Therefore the number of milimoles present in 0.2N H₂SO₄ are 500 milimoles(choice 1)

Answer 2

Answer:

500(a)

Explanation:

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