Determine the concentrations of babr2, ba2 , and br– in a solution prepared by dissolving 1.38 × 10–4 g babr2 in 2.00 l of water. express all three concentrations in molarity. additionally, express the concentrations of the ionic species in parts per million (ppm).

Recognize that every formula unit of BaBr2 has one ion of Ba+2, and 2 ions of Br-1. That means that when this substance dissociates, you'll get one concentration of Ba+2 ions, and a concentration of Br- ions TWICE as large. Whatever the concentration of Ba+2 ions is that you calculate, double it for the conentration of the Br-1 ion.

thats how its supposed to be

a electronegativity decreases beacuse the size of nucleus is bigger.