Final answer:
Sodium chloride will be more soluble in water, hexane will be more soluble in heptane, ethanol and sucrose will be more soluble in water.
Step-by-step explanation:
When predicting solubility, it is important to consider the nature of the solute and the solvent. In general, polar solutes tend to dissolve more readily in polar solvents like water, while nonpolar solutes are more soluble in nonpolar solvents like heptane.
a) Sodium chloride (NaCl) is an ionic compound and will be more soluble in water, which is a polar solvent.
b) Hexane (C6H14) is a nonpolar hydrocarbon and will be more soluble in heptane, which is also a nonpolar solvent.
c) Ethanol (C2H5OH) is a polar compound and will be more soluble in water.
d) Sucrose (C12H22O11) is also a polar compound and will be more soluble in water.