Why the solubility of Glauber,s salt `(Na_(2)SO_(4)10 H_(2)O)` first increases up to `32.4^(@)C` and then decreases ?

Solubility curve of Na_(2)SO_(4).10H_(2)O in water with temperature is given as

40.25g of Glauber's salt (Na_(2)SO_(4).10H_(2)O) is dissolved in water to obtain 500mL of solution of density 1077.5gdm^(-3) . The molality of Na_(2)SO_(4) in solution is about:

Define (i) Mole fraction (ii) Molality (iii) Raoult's law (b) Assuming complete dissociation, calculate the expected freezing point of a solution prepared by dissolving 6.00 g of Glauber's salt, Na_(2)SO_(4).10 H_(2)O in 0.100 kg of water. ( K_(f) for water = 1.86 K kg "mol"^(-1) , Atomic massess : Na=23, S=32, O=16 , H=1)

Na_(2)SO_(4).xH_(2)O has 50% H_(2)O . Henxe, x is :

The solubility of silver benzoate (C_(6)H_(5)COOAg) in H_(2)O and in a buffer solution of pH = 2, 3 , and 4 are S_(1), S_(2), S_(3) and S_(4) respectively. The decreasing order of solubility is

13.4 g of a sample of unstable hydrated salt Na_(2)SO_(4).XH_(2)O was found to contains 6.3 g of H_(2) O . The number of molecular of water of crystalistion is

If the solubility of Ag_(2)SO_(4) in 10^(-2)M Na_(2)SO_(4) solution be 2xx10^(-8)M then K_(sp) of Ag_(2)SO_(4) will be

If the solubility of Ag_(2)SO_(4) in 10^(-2)M Na_(2)SO_(4) solution be 2xx10^(-8)M then K_(sp) of Ag_(2)SO_(4) will be

The oxidation number of S in Mohr's salt {FeSO_4(NH_4)_2SO_4*6H_2O} is

The crystalline salt Na_(2)SO_(4).xH_(2)O on heating loses 55.9 % of its weight. The formula of the crystalline salt is