How many moles of Mg2+ and NO3- form for each mole of Mg(NO3)2 that dissolves?
Mg(NO3)2 ==> Mg^+2 + 2NO3^-
To determine the number of moles of Mg2+ and NO3- ions that form for each mole of Mg(NO3)2 that dissolves, we need to understand the chemical formula of magnesium nitrate (Mg(NO3)2).
In magnesium nitrate, Mg2+ is the cation (positively charged ion) and NO3- is the anion (negatively charged ion). The subscript numbers within the chemical formula indicate the number of each ion present in one molecule of the compound.
For Mg(NO3)2, there is one Mg2+ ion and two NO3- ions in each molecule. Therefore, when one mole of Mg(NO3)2 dissolves, it forms one mole of Mg2+ ions and two moles of NO3- ions.
To summarize:
- For each mole of Mg(NO3)2 that dissolves, it forms one mole of Mg2+ ions.
- For each mole of Mg(NO3)2 that dissolves, it forms two moles of NO3- ions.