The student uses 25.0 cm3 of 1.60 mol / dm3 sodium hydroxide to prepare the crystals.
2NaOH(aq) + H2SO4(aq) + 8H2O(l) ------ Na2SO4.10H2O(s)
Calculate the maximum mass of hydrated sodium sulfate crystals that can be formed.

Question

The student uses 25.0 cm3 of 1.60 mol / dm3 sodium hydroxide to prepare the crystals.
2NaOH(aq) + H2SO4(aq) + 8H2O(l) ------> Na2SO4.10H2O(s)
Calculate the maximum mass of hydrated sodium sulfate crystals that can be formed.

anonymous · Answer

Very first step is to convert the units into a same unit. 

Then you have to calculate the moles of NaOH used, from this value, obtain the number of moles of $Na_2 SO_4 $ ((2 moles of NaOH gives one mole of sodium sulfate hydrate.)

Find out the weight of sodium sulphate from the no. of moles of sodium sulphate.