Question

19.
CE
The number of moles of KCl present in 500ml of 2M
solution is
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Answer 1

Explanation:

Moles are a product of the concentration in moldm-3 ie M and the volume in dm3 or litre. And 1 litre is equivalent to 1dm3 which is the SI unit for volume. And 1dm3 is equivalent to 1000cm3. Meaning 1ml is also equal to 1cm3. But you volume must always be calculated in SI unit form.

Moles are a product of the concentration in moldm-3 ie M and the volume in dm3 or litre. And 1 litre is equivalent to 1dm3 which is the SI unit for volume. And 1dm3 is equivalent to 1000cm3. Meaning 1ml is also equal to 1cm3. But you volume must always be calculated in SI unit form.Therefore number of moles found in 500ml of 0.2M is equal to

Moles are a product of the concentration in moldm-3 ie M and the volume in dm3 or litre. And 1 litre is equivalent to 1dm3 which is the SI unit for volume. And 1dm3 is equivalent to 1000cm3. Meaning 1ml is also equal to 1cm3. But you volume must always be calculated in SI unit form.Therefore number of moles found in 500ml of 0.2M is equal to500ml/1000ml x 0.2M = 0.1moles.

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