Yes, Ba(NO3)2 (barium nitrate) is soluble in water. When barium nitrate is added to water, it dissociates into barium ions (Ba2+) and nitrate ions (NO3–) due to the interactions between the polar water molecules and the ionic compound.
This solubility can be attributed to the strong interactions that water has with the ions, effectively overcoming the lattice energy that holds the barium nitrate together in its solid form. As a result, barium nitrate can easily dissolve in water, making it useful in various applications, including in fertilizers and pyrotechnics.