Advertisements
Advertisements
Question
Find the percentage of water of crystallisation in CuSO4.5H2O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)
Solution
The relative molecular mass of CuSO4.5H2O
= 64 + 32 + (4 × 16) + 5 [(2 × 1) + 16]
= 160 + 90
= 250
250g of CuSO4.5H2O contains 90g of water of crystallization.
= `90/250 xx 100`
= 36 g
∴ Percentage of water of crystallisation in CuSO4.5H2O = 36%
APPEARS IN
RELATED QUESTIONS
Commercial sodium hydroxide weighing 30 g has some sodium chloride in it. The mixture on dissolving in water and subsequent treatment with excess silver nitrate solution formed a precipitate weighing 14.3 g. What is the percentage of sodium chloride in the commercial sample of sodium hydroxide? The equation for the reaction is
\[\ce{NaCl + AgNO3 -> AgCl + NaNO3}\]
[Relative molecular mass of NaCl = 58, AgCI = 143]
Calculate the percentage of nitrogen and oxygen in ammonium nitrate. [Relative molecular mass of ammonium nitrate is 80, H = 1, N = 14, O = 16].
Calculate the percentage of phosphorus in Calcium phosphate Ca3(PO4)2
Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%
Find the percentage of phosphorus in the fertilizer superphosphate Ca(H2PO4)2.
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
Calculate the percentage composition of calcium nitrate [Ca = 40 , Cl = 35.5 , N = 14 , O = 16]
60 g of a compound on analysis gave 24 g C, 4 g H and 32 g O. The empirical formula of the compound is ______.
Empirical formula of Ethyne.
Find the total percentage of Magnesium in magnesium nitrate crystals, Mg(NO3)2.6H2O.
[Mg = 24, N = 14, O = 16 and H = 1]
