What? Molarity?

Chemistry Level 2

Find the molarity of pure water, completely filling a cubical container of side length $10 \text{ cm}$ .

The answer is 55.56.

4 solutions

Nehemiah Osei
Dec 17, 2015

Well, it's a cubical container of side length 10cm. The volume of the container is 1000 $cm^3$

1 $cm^3$ is approximately equal to 1 gram

Therefore we have about 1000 grams of water filling the container. dividing this mass by the molar mass, 18g/mol, we get the moles of water in 1000 $cm^3$

the molarity

55.5

Juan Andrew Sasongko
Jan 28, 2015

as molarity of pure water is 55.5 mol/L then :

Find the volume of cubical container in litre = 10x10x10 / 1000 = 1 L
55.5 mol/L times 1 = 55.56 mo l

'General knowledge makes problems easier'....isn't it so ?? @ Andrew Juan .

tanmay goyal - 6 years, 4 months ago

(1000 g/ L)/ (18.01528 g/ mol) $\approx$ 55.5 mol/ L

Lu Chee Ket - 5 years, 4 months ago

I think water doesn't has molarity... cause the water is liquid form, not aquoeus form ._.

Manaman Huang - 5 years, 10 months ago

James Garth Baron Acedera
Feb 7, 2015

(10cm)^3 x (1mL/cm^3) x (1L/1000mL) x (1000g/L) x (1mol/18.02g) x (1/1L) = 55.49mol/L

Tanmay Goyal
Jan 28, 2015

its a very simple deal - the volume of cubical container = 1000 cc -we know tht 1000gm mass covers 1000cc -Molar mass of water= 18 g
- Molarity = Moles/l
- So required no of moles of water = (1000/18 )=55.56

What? Molarity?

The answer is 55.56.

4 solutions

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