It is possible to predict whether reactions of this type will occur by studying the solubility rules for inorganic salts in water. Table 7.1 and Figure 7.3 summarize these rules. We can take any two salts and guess the products by assuming a double displacement. Substances like FeCl 3 or HCl are completely soluble in water and exist in water as ions, rather than as molecules in the solid or gas phase. Strong conductor of electricity are called strong electrolytes.
All soluble salts are strong electrolytes.
Tap water, containing soluble salts, is a good conductor or good electrolyte. 7.3 Describing Reactions in Aqueous solutions. Let's look at the reaction between silver nitrate and sodium chloride again. This is called the molecular equation for the reaction. In fact, as long as we mix silver ion with chloride ion together, we would get a reaction.