The solubility of copper (II) tetraoxosulphate (Iv) is 75...
The solubility of copper (II) tetraoxosulphate (Iv) is 75g in 100g of water at 100°C and 25g in 100g of water at 30°C. What mass of the salt would crystallize, if 50g of copper (II) tetraoxosulphate (VI) solution saturated at 100°C were cooled to 30°C ?
57.5
42.2
28.6
14.3
Correct answer is D
solute + solvent = solution
at 100oC; 75g + 100g = 175g
at30oC; 25g50g + 100g = 125g
From 100oC - 30oC; 175g CuSO4 ppt 50g
From 100oC - 30oC; 50g CuSO4 ppt 50×50175 = 14.3
Copper can best be purified by ...
The line observed in the sample hydrogen spectrum are due to emission of? ...
The atomic number of an isotope of hydrogen is equal to its mass number because it ...
Which statement is NOT true about the composition of starch? ...
Ethene undergoes mainly addition reactions because it is ...
What is CaHb in the following equation? C a H b + 5O2 → 3CO 2 + 4H2O...