Tristearin and stearic acid are insoluble in water. however, sodium stearate (soap) is soluble. why is there this difference in solubility?

Explanation:

Sodium stearate , is the soap , it a ionic compound , hence , can easily break to cation and anion , and therefore is soluble in water .It works on the principle of micelle formation .

Tristearin and stearic acid are fatty acids , and have are carboxyl group and have a very huge hydrocarbon chain , making it non polar in nature ,hence is is insoluble in water , since , water is a polar molecule .

1) solid barium

2Ba(s)  &  O2 9g)  -->  2 BaO (s)

2) solid boron

4 B(s) + 3 O2 (g) → 2 B2O3 (s)

3) liquid acetone (C3H6O)

1 C3H6O(l)  & 4 O2 (g)  -->  3CO2(g)  &   3H2O (g)

4) liquid octane (C8H18)

2 C8H18   & 25 O2 (g)  -->  16CO2 (g)  & 18 H2O (g)

Explanation: