Determination of water of hydration Essay

Observation of atomic number 29 sulphateNo copper sulphateLight blueAfter heating for about 2-3 minutes, of the pulverize turns lighter and then into grey-white.Water released as vapor is observed from this point. After heating for another 2-3 minutes, of the pulverization turns into grey-white. After heating for 10 minutes, the whole divulge of the powder turns into grey-white with some parts of light super acidThe whole part of the powder remains grey-white with some parts of light greenThe whole part of the powder remains grey-white with some parts of light green* Mass of hydrated copper sulfate (g) = (46.08 0.01) (43.78 0.01) = 2.30 0.02 (g)* Mass of water (g) = ( 46.08 0.01) (45.22 0.01) = 0.86 0.02 (g)* General reaction hydrate anhydrous salt + waterCuSO4.xH2O CuSO4 + xH2Om 2.30 0.02 (g) 0.86 0.02 (g)M 160 +18x (g/mol) 18x (g/mol)* n xH2O (mol) = n CuSO4.xH2O==(0.86 )(160 + 18x) = )18x160(0.86 ) + 18x(0.86 ) = )18x160(0.86 ) = 18x(1.44 0.04)x = = = 5.3 0.3Conc lusion The value of x in CuSO4.xH2O is quite standardised to the value on the label (literal value) of the hydrated copper sulfate jar (% of difference is 6%)military ratingLimitationsEffectsImprovementsThe number of experiments carried out is not enough (Random error)If the data obtained are inaccurate as a result, the value of x calculated will be inaccurateDo the experiment many measureWhen cooling the melting pot, water can be reformed in copper sulfate(random error)Weight of the melting pot may increaseUse a data logger computer to take the mass of the crucible continuously until the mass remains unchangedThe flame is too strong(random error)Some copper sulfate molecules may be decomposedKeep the flame at a reasonable height and temperature