Question

calculate the molarity of pure water if it's density is 1000kg/m^3
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Answer 1

Answer:

Here is the answer---

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Given 》

Density of the Water = 1000 kg/m3

We know,

1 liter of water = 1 kg.

( Since, Density is 1000 kg/ m^3

Thus, 1000 ml of water = 1 kg.

(Since, 1 liter = 1000 ml)

Now, Mass of Water = 1 kg.

= 1000 g.

Molecular mass of the water molecules = 18 grams.

Using the formula,

No.of moles = Mass/ Molecular mass.

= 1000/18 moles.

= 55.56 moles.

For the Molarity,

Using the Formula,

Molarity =

(No. of Moles/Volume in ml) × 1000

= (55.56/1000) × 1000

= 55.56 M.

Thus, the molarity of the water is 55.56 M.

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Hope it helps.