Elements and Compounds

# What is the molarity of sodium sulphate in a solution prepared by dissolving 15.5g in enough water to make 35ml of solution?

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###### Wiki User

Get moles sodium sulfate first.

15.5 grams Na2SO4 (1 mole Na2SO4/142.05 grams) = 0.1091 moles Na2SO4

Now,

Molarity = moles of solute/ Liters of solution ( 35 ml = 0.035 Liters )

Molarity = 0.1091 moles Na2SO4/0.035 Liters

= 3.1 M Na2SO4 solution

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## Related Questions

The molarity of a solution made by dissolving 23,4 g of sodium sulphate in enough water to make up a 125 mL solution is 1,318.

fehling's solution is dark blue at room temperature "Fehling's solution" is prepared by dissolving separately 34'639 grammes of copper sulphate, 173 grammes of Rochelle salt, and 71 grammes of caustic soda in water, mixing and making up to l000 ccs.; 10 ccs. of this solution is completely reduced by o 05 grammes of hexose

Dissolving in water (aq):Na2SO4 --> 2(Na+)aq + (SO42-)aq

when copper sulphate solution when we put an iron nail the copper sulphate will become pale green . keep it for 1or more days it will become crystals.

It's prepared by dissolving ferrous and ammonium sulphate in water with some sulphuric acid and recrystallising. For details please see the wikipedia article about ammonium iron (II) sulfate.

copper sulphate solution-blue sodium chloride (salt) solution-clear sodium nitrate solution- white to clear sodium sulphate solution- white copper sulphate solution-blue sodium chloride (salt) solution-clear sodium nitrate solution- white to clear sodium sulphate solution- white

Copper sulphate solution (i.e. aqueous copper sulphate) is an electrical conductor.

What effect would dissolving some copper sulphate crystals in the water have on its boiling point?

Why does the colour of copper sulphate solution change when an iron nail is dipped in it? When an iron nail is placed in a copper sulphate solution, iron displaces copper from copper sulphate solution forming iron sulphate, which is green in colour. Therefore, the blue colour of copper sulphate solution fades and green colour appears.

If we add magnesium to a solution of zinc sulphate then magnesium will displace zinc from zinc sulphate solution as being more reactive.

No. The zinc will react with the ferrous sulphate, dissolving the zinc and forming solid iron. This is due to the positions of iron and zinc in the activity series.See the Related Questions for more information about the activity series.

Copper sulphate is manufactured by dissolving the copper fillings in Sulphuric AcidProf Abdul Khaliq Bakoch

A physical change is different from a chemical change in two ways:1) In a physical change no new substances are made; in a chemical change new substances are made.2) A physical change can be easily reversed; a chemical change cannot be easily reversed.Dissolving copper sulphate in water does not produce a new substance. The copper sulphate solution is a mixture, not a pure substance.Also, by evaporating the water you can easily get the copper sulphate back again.So, dissolving copper sulphate is a physical change.Sometimes, though, when water is added to copper sulphate, it reacts with the water to form copper sulphate pentahydrate, which is a new compound. This would be a chemical change, but actually dissolving it is indeed a physical change only.See these sites for more information:http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/chem_react_2.shtmlhttp://www.chem4kids.com/files/matter_chemphys.html

Yes, copper sulphate(CuSO4) can be separated from its solution in crystalline form.

When an iron nail is placed in a copper sulphate solution, iron displaces copper from copper sulphate solution forming iron sulphate, which is green in colour.Therefore, the blue colour of copper sulphate solution fades and green colour appears.

If you are only dissolving something no reaction is occurring, so it is neither exo or endothermic

Zinc is more reactive than copper, so it'll displace the copper &amp; take on the sulphate ion for itself: Copper sulphate solution + Zinc --&gt; Zinc sulphate + copper Copper sulphate solution is blue &amp; zinc sulphate is colourless, so during the reaction, the blue colour will fade.

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