What factors determine the solubility of alt in water? Explain. A student is eva

Question

What factors determine the solubility of alt in water? Explain. A student is evaluating the solubility potassium chlorate (KCIO_3;MW =122.5 g/mol) at various temperatures. She dissolves 2.50 g of KCLO_3 in total volume of 7.5 mL of water. Calculate the concentration of KCIO_3 in this solution in g/100 mL. Calculate the concentration of KCIO_3 in this solution in mol/L. The student heats the solution up to 80 degree C and then removes the test tube containing the salt solution from the hot water bath. Crystals of KClO_3 appear at 74 degree C. Calculate the value of K_sp for KCLO_3 s at this temperature.

Explanation / Answer

1. the factors that determine the solubility of salt in water

a. temeparture, as temperature increases the solubility increases

b. intermolecular forces, polarity

c. solute-solvent interactions: strong solute solvent attractions eqaute to greater solubility while weak solute solvent attractions eqaute to lesser solubilty.

2.we know that molrity= (wt/ m.wt)*1000/volume

= (2.50/122.5)*1000/7.5 = 2.72M

in 100 ml= (2.50/122.5)*1000/100= 0.2040M

in 1000 ml = 2.50/122.5= 0.0204 M

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